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Launch Escape System

Launch escape system

A Launch Escape System (LES) is a top-mounted rocket connected to the crew module of a crewed spacecraft and used to quickly separate and launch the crew module away from the rest of the rocket in the case of an emergency. Since the escape rockets are above the crew module, the LES typically use separate nozzles which are angled away from the crew module to prevent the LES exhaust from hitting it. The LES is used in situations where there is an imminent threat to the crew, such as an impending explosion. Historically, LES's were used on American Mercury and Apollo spacecraft. They continue to be used on the Russian Soyuz spacecraft. The only emergency use of a LES occurred during the attempt to launch Soyuz T-10 on September 26, 1983. The rocket caught fire, just before launch. But the LES was able to carry the crew capsule clear, seconds before the rocket exploded. The Russian Vostok and American Gemini spacecraft both made use of ejection seats. The European Space Agency's Hermes and the Russian Buran space shuttles would also have made use of them if they had ever flown with crews. As shown by Soyuz-T10, an LES must be able to carry a crew compartment from the launch pad to a height sufficient for its parachutes to open. Consequently, they must make use of large, powerful (and heavy) solid rockets. If possible, spacecraft designers prefer to use ejection seats as they are lighter and would be available for use when the spacecraft is returning to Earth. solid rockets The Space Shuttle was initially fitted with ejection seats for the initial "shakedown" flights, but these were removed once the vehicle was deemed operational. Following the Challenger disaster, all surviving orbiters were fitted to allow for crew evacuation through the main hatch, though this can only be used when the shuttle is in a controlled glide.

External link

- [http://www.apollosaturn.com/asnr/escape.htm 'Launch Escape Subsystem'] - Detailed description of the Apollo launch escape system at http://www.apollosaturn.com/ Category:Human spaceflight

Rocket

A rocket is a vehicle, missile or aircraft which obtains thrust by the reaction to the ejection of fast moving exhaust gas from within a rocket engine. Often the term rocket is also used to mean a rocket engine. In military terminology, a rocket generally uses solid propellant and is unguided. These rockets can be fired by ground-attack aircraft at fixed targets such as buildings, or can be launched by ground forces at other ground targets. During the Vietnam era, there were also air launched unguided rockets that carried a nuclear payload designed to attack aircraft formations in flight. A missile, by contrast, can use either solid or liquid propellant, and has a guidance system. This distinction generally applies only in the case of weapons, though, and not to civilian or orbital launch vehicles. In all rockets the exhaust is formed from propellant which is carried within the rocket prior to its release. Rocket thrust is due to accelerating the exhaust gases (see Newton's 3rd Law of Motion). There are many different types of rockets, and a comprehensive list can be found in spacecraft propulsion- they range in size from tiny models that can be purchased at a hobby store, to the enormous Saturn V used for the Apollo program. Rockets are used to accelerate, change orbits, de-orbit for landing, for the whole landing if there is no atmosphere (e.g. for landing on the Moon), and sometimes to soften a parachute landing immediately before touchdown (see Soyuz spacecraft). Most current rockets are chemically powered rockets (internal combustion engines). A chemical rocket engine can use solid propellant (see Space Shuttle's SRBs), liquid propellant (see Space shuttle main engine), or a hybrid mixture of both. A chemical reaction is initiated between the fuel and the oxidizer in the combustion chamber, and the resultant hot gases accelerate out of a nozzle (or nozzles) at the rearward facing end of the rocket. The acceleration of these gases through the engine exerts force ('thrust') on the combustion chamber and nozzle, propelling the vehicle (in accordance with Newton's Third Law). See rocket engine for details. Not all rockets use chemical reactions. Steam rockets, for example, release superheated water through a nozzle where it instantly flashes to high velocity steam, propelling the rocket. The efficiency of steam as a rocket propellant is relatively low, but it is simple and reasonably safe, and the propellant is cheap and widely available. Most steam rockets have been used for propelling land-based vehicles but a small steam rocket was tested in 2004 on board the UK-DMC satellite. There are proposals to use steam rockets for interplanetary transport using either nuclear or solar heating as the power source to vaporize water collected from around the solar system. Rockets where the heat is supplied from other than the propellant, such as steam rockets, are classed as external combustion engines. Other examples of external combustion rocket engines include most designs for nuclear powered rocket engines. Use of hydrogen as the propellant for external combustion engines gives very high velocities. Due to their high exhaust velocity (mach ~10+), rockets are particularly useful when very high speeds are required, such as orbital speed (mach 25). The speeds that a rocket vehicle can reach can be calculated by the rocket equation; which gives the speed difference ('delta-v') in terms of the exhaust speed and ratio of initial mass to final mass ('mass ratio'). Rockets must be used when there is no other substance (land, water, or air) or force (gravity, magnetism, light) that a vehicle may employ for propulsion, such as in space. In these circumstances, it is necessary to carry all the propellant to be used. Common mass ratios for vehicles are 20/1 for dense propellants such as liquid oxygen and kerosene, 25/1 for dense monopropellants such as hydrogen peroxide, and 10/1 for liquid oxygen and liquid hydrogen. However, mass ratio is highly dependent on many factors such as the type of engine the vehicle uses and structural safety margins. Often, the required velocity (delta-v) for a mission is unattainable by any single rocket because the propellant, structure, guidance and engines weigh so much as to prevent the mass ratio from being high enough. This problem is frequently solved by staging - the rocket sheds excess weight (usually tankage and engines) during launch to reduce its weight and effectively increase its mass ratio. Typically, the acceleration of a rocket increases with time (even if the thrust stays the same) as the weight of the rocket decreases as fuel is burned. Discontinuities in acceleration will occur when stages burn out, often starting at a lower acceleration with each new stage firing.

History

Origins of rocketry

staging The ancient Chinese invention of gunpowder by Taoist chemists, and their use of it in various forms of weapons: (fire arrows), bombs, and cannons, resulted in the development of the rocket. They were initially developed for religious proceedings that were related to the worship and celebration of the Chinese Gods in the ancient Chinese religion. They were the precursors to modern fireworks and, after extensive research, were adapted for use as artillery in warfare during the 10th century to 12th century. Some of the ancient Chinese rockets were stationed at the military fortification known as the Great Wall of China, and employed by the elite soldiers stationed there. Rocket technology first became known to Europeans following their use by the Mongols Genghis Khan and Ogodei Khan when they conquered Russia, Eastern Europe, and parts of Central Europe(i.e. Austria). The Mongolians had stolen the Chinese technology by conquest of the northern part of China and also by the subsequent employment of Chinese rocketry experts as mercenaries for the Mongol military. Additionally, the spread of rockets into Europe was also influenced by the Ottomans at the siege of Constantinople in 1453. Although it is very likely that the Ottomans themselves were influenced by the Mongol invasions of the previous few centuries. Nevertheless, for several more centuries rockets remained misunderstood curiosities to those in the West. For over two centuries, the work of Polish-Lithuanian Commonwealth nobleman Kazimierz Siemienowicz, "Artis Magnae Artilleriae pars prima" ("Great Art of Artillery, the First Part". also known as "The Complete Art of Artillery"), was used in Europe as a basic artillery manual. The book provided the standard designs for creating rockets, fireballs, and other pyrotechnic devices. It contained a large chapter on caliber, construction, production and properties of rockets (for both military and civil purposes), including multi-stage rockets, batteries of rockets, and rockets with delta wing stabilizers (instead of the common guiding rods). At the end of the 18th century, rockets were successfully used militarily in India against the British by Tipu Sultan of the Kingdom of Mysore during the first Mysore War. The British then took an active interest in the technology and developed it further during the 19th century. The major figure in the field at this time was William Congreve. From there, the use of military rockets spread throughout Europe. At the Battle of Baltimore in 1814, the rockets fired on Fort McHenry by the rocket vessel HMS Erebus were the source of the rockets' red glare described by Francis Scott Key in The Star-Spangled Banner. Early rockets were very inaccurate. Without the use of spinning or any gimballing of the thrust, they had a strong tendency to veer sharply off course. The early British Congreve rockets reduced this somewhat by attaching a long stick to the end of a rocket (similar to modern bottle rockets) to make it harder for the rocket to change course. The largest of the Congreve rockets was the 32 pound (14.5 kg) Carcass, which had a 15 foot (4.6 m) stick. Originally, sticks were mounted on the side, but this was later changed to mounting in the center of the rocket, reducing drag and enabling the rocket to be more accurately fired from a segment of pipe. gimbal The accuracy problem was mostly solved in 1844 when William Hale modified the rocket design so that thrust was slightly vectored to cause the rocket to spin along its axis of travel like a bullet. The Hale rocket removed the need for a rocket stick, travelled further due to reduced air resistance, and was far more accurate.

Modern rocketry

In 1903, high school mathematics teacher Konstantin Tsiolkovsky (1857-1935) published Исследование мировых пространств реактивными приборами (The Exploration of Cosmic Space by Means of Reaction Motors), the first serious scientific work on space travel. The Tsiolkovsky rocket equation—the principle that governs rocket propulsion—is named in his honor. His work was essentially unknown outside the Soviet Union, where it inspired further research, experimentation, and the formation of the Cosmonautics Society. His work was republished in the 1920s in response to Russian interest in the work of Robert Goddard. Among other ideas, Tsiolkovsky accurately proposed to use liquid oxygen and liquid hydrogen as a nearly optimal propellant pair and determined that building staged and clustered rockets to increase the overall mass efficiency would dramatically increase range. Early rockets were grossly inefficient because of the heat energy that was wasted in the exhaust gases. Modern rockets were born when, after receiving a grant in 1917 from the Smithsonian Institution, Robert Goddard attached a supersonic (de Laval) nozzle to a rocket engine's combustion chamber. These nozzles turn the hot gas from the combustion chamber into a cooler, hypersonic, highly directed jet of gas; more than doubling the thrust and enormously raising the efficiency. In 1923, Hermann Oberth (1894-1989) published Die Rakete zu den Planetenräumen ("The Rocket into Planetary Space"), a version of his doctoral thesis, after the University of Munich rejected it. This book is often credited as the first serious scientific work on the topic that received international attention. During 1920s, a number of rocket research organizations appeared in America, Austria, Britain, Czechoslovakia, France, Italy, Germany, and Russia. In the mid-1920s, German scientists had begun experimenting with rockets which used liquid propellants capable of reaching relatively high altitudes and distances. A team of amateur rocket engineers had formed the Verein für Raumschiffahrt (German Rocket Society, or VfR) in 1927, and in 1931 launched a liquid propellant rocket (using oxygen and gasoline). From 1931 to 1937, the most extensive scientific work on rocket engine design occurred in Leningrad, at the Gas Dynamics Laboratory. Well funded and staffed, over 100 experimental engines were built under the direction of Valentin Glushko. Work included regenerative cooling, hypergolic ignition, and fuel injector designs that included swirling and bi-propellant mixing injectors. Work was curtailed by Glushko's arrest during Stalinist purges in 1938. Similar but much less extensive work was also done by the Austrian professor Eugen Sänger. In 1932, the Reichswehr (which in 1935 became the Wehrmacht) began to take an interest in rocketry. Artillery restrictions imposed by the Treaty of Versailles limited Germany's access to long distance weaponry. Seeing the possibility of using rockets as long-range artillery fire, the Wehrmacht initially funded the VfR team, but seeing that their focus was strictly scientific, created its own research team, with Hermann Oberth as a senior member. At the behest of military leaders, Wernher von Braun, at the time a young aspiring rocket scientist, joined the military (followed by two former VfR members) and developed long-range weapons for use in World War II by Nazi Germany, notably the A-series of rockets, which led to the infamous V-2 rocket (initially called A4). In 1943, production of the V-2 rocket began. The V-2 represented the biggest step forward in rocketry ever. The V-2 had an operational range of 300 km (185 miles) and carried a 1000 kg (2204 lb) warhead, with an amatol explosive charge. The vehicle was only different in details from most modern rockets, with turbopumps, inertial guidance and many other features. Thousands were fired at various Allied nations, mainly England, as well as Belgium and France. While they could not be intercepted, their guidance system design and single conventional warhead meant that the V-2 was insufficiently accurate against military targets. 2,754 people in England were killed, and 6,523 were wounded before the launch campaign was terminated. While the V-2 did not significantly affect the course of the war, it provided a lethal demonstration of the potential for guided rockets as weapons. At the end of World War II, competing Russian, British, and U.S. military and scientific crews raced to capture technology and trained personnel from the German rocket program at Peenemünde. Russia and Britain had some success, but the United States benefited most. The US captured a large number of German rocket scientists (many of whom were members of the Nazi Party, including von Braun) and brought them to the United States as part of Operation Paperclip. There the same rockets that were designed to rain down on Britain were used instead by scientists as research vehicles for developing the new technology further. The V-2 evolved into the American Redstone rocket, used in the early space program. After the war, rockets were used to study high-altitude conditions, by radio telemetry of temperature and pressure of the atmosphere, detection of cosmic rays, and further research. This continued in the U.S. under von Braun and the others, who were destined to become part of the U.S. scientific complex. Independently, research continued in the Soviet Union under the leadership of Sergei Korolev. With the help of German technicians, the V-2 was duplicated and improved as the R-1, R-2 and R-5 missiles. German designs were abandoned in the late 1940s, and the foreign workers were sent home. A new series of engines built by Glushko and based on inventions of Aleksei Isaev formed the basis of the first ICBM, the R-7. The R-7 launched the first satellite, the first man into space and the first lunar and planetary probes, and is still in use today. These events attracted the attention of top politicians, along with more money for further research. Rockets became extremely military important in the form of ICBMs when it was realised that nuclear weapons carried on a rocket vehicle were essentially not defensible against once launched, and they became the delivery platform of choice for these weapons. Fuelled partly by the cold war, the 1960s became the decade of rapid development of rocket technology in the Soviet Union (Vostok, Soyuz, Proton) and in the United States (e.g. X-20 Dyna-Soar, Gemini), including research in other countries, such as Britain, Japan, Australia, etc., culminating at the end of the 60s with the manned landing on the moon via the Saturn V. Rockets remain a popular military weapon. The use of large battlefield rockets of the V-2 type has given way to guided missiles, but rockets are often used by helicopters and light aircraft for ground attack, being more powerful than machine guns, but without the recoil of a heavy cannon. In the 1950s there was a brief vogue for air-to-air rockets, including the formidable AIR-2 'Genie' nuclear rocket, but by the early 1960s these had largely been abandoned in favor of air-to-air missiles. However in the heart of many of the public, the most important use of rockets is manned spaceflight. Vehicles such as Soyuz for orbital tourism and Spaceship One for suborbital tourism show the way towards greater commercialisation of rocketry, away from government funding, and towards more widespread access to space.

Regulation

Under international law, the nationality of the owner of a launch vehicle determines which country is responsible for any damages resulting from that vehicle. Due to this, some countries require that rocket manufacturers and launchers adhere to specific regulations to indemnify and protect the safety of people and property that may be affected by a flight. In the US any rocket launch that is not classified as amateur, and also is not "for and by the government," must be approved by the Federal Aviation Administration's Office of Commercial Space Transportation (FAA/AST), located in Washington, DC.

Accidents

Because of the enormous chemical energy in all useful rocket fuels (greater weight for weight than in explosives), accidents can and have happened. The number of people injured or killed is usually small because of the great care typically taken, but this record is not perfect. See List of space disasters

Future

- Nuclear thermal rockets have also been developed, but never deployed, they are particularly promising for interplanetary use because of their high efficiency.
- [http://www.neofuel.com Neofuel] - Nuclear/solar steam rockets for interplanetary use, using abundant extraterrestrial ice.
- Nuclear pulse propulsion rocket concepts give very high thrust and exhaust velocities. Another class of rocket-like thrusters in increasingly common use are ion drives, which use electrical rather than chemical energy to accelerate their reaction mass.

Patents of interest

- - Rocket apparatus - R. H. Goddard
- - Rocket apparatus - R. H. Goddard

External links

; Governing agencies
- [http://ast.faa.gov/ FAA Office of Commercial Space Transportation]
- [http://www.nasa.gov National Aeronautics and Space Administration (NASA)]
- [http://www.nar.org National Association of Rocketry]
- [http://www.tripoli.org Tripoli Rocketry Association]
- [http://www.canadianrocketry.org Canadian Association of Rocketry]
- [http://www.hobby.org Hobby Industry Association]
- [http://www.rchta.org Radio Control Hobby Trade Association]
- [http://www.ja-r.net Japan Association of Rocketry (site in Japanese)]
- [http://www.isro.org Indian Space Research Organisation] ; Information sites
- [http://www.astronautix.com/lvs/ Encyclopedia Astronautica - Rocket and Missile Alphabetical Index]
- [http://space.skyrocket.de Gunter's Space Page - Complete Rocket and Missile Lists] Category:Rocket-powered aircraft Category:Rocketry ja:ロケット ms:Roket

Project Mercury

Project Mercury was the United States first successful manned spaceflight program. It ran from 1959 through 1963 with the goal of putting a man in orbit around the Earth. Early planning and research was carried out by NACA, while the program was officially carried out by the newly created NASA. The name Mercury comes from the Roman god (it is also the name of the innermost planet of the solar system). The Mercury program cost $1.5 billion in 1994 dollars. See NASA Budget.

Spacecraft

__NOTOC__ Mercury spacecraft (also called a capsule or space capsule) were very small one-man vehicles; it was said that the Mercury spacecraft were not ridden, they were worn. Only 1.7 cubic meters in volume, the Mercury capsule was barely big enough to include its pilot. Inside were 120 controls: 55 electrical switches, 30 fuses and 35 mechanical levers. The spacecraft was designed by Max Faget and NASA's Space Task Group. During the launch phase of the mission, the Mercury spacecraft and astronaut were protected from launch vehicle failures by the Launch Escape System. The LES consisted of a solid fuel, 52,000 lbf (231 kN) thrust rocket mounted on a tower above the spacecraft. In the event of a launch abort, the LES fired for 1 second, pulling the Mercury spacecraft away from a defective launch vehicle. The spacecraft would then descend on its parachute recovery system. After booster engine cutoff (BECO), the LES was no longer needed and was separated from the spacecraft by a solid fuel, 800 lbf (3.6 kN) thrust jettison rocket, that fired for 1.5 seconds. To separate the Mercury spacecraft from the launch vehicle, the spacecraft fired three small solid fuel, 400 lbf (1.8 kN) thrust rockets for 1 second. These rockets are called the Posigrade rockets. The spacecraft had only attitude control thrusters. After orbit insertion and before retrofire they could not change their orbit. The spacecraft had three sets of control jets for each axis (yaw, pitch and roll), supplied from two separate fuel tanks. An automatic set of high and low powered jets and a set of manual jets, fueled from either the automatic tank or the manual tank. The pilot could use any one of the three thruster systems and fuel them from either of the two fuel tanks to provide spacecraft attitude control. The Mercury spacecraft were designed to be totally controllable from the ground in the event that the space environment impaired the pilot's ability to function. The spacecraft had three solid fuel, 1000 lbf (4.5 kN) thrust retrorockets that fired for 10 seconds each. One was sufficient to return the spacecraft to earth if the other two failed. The first retro was fired, five seconds later the second was fired (while the first was still firing). Five seconds after that, the third retro fires (while the second retro is still firing). This is called ripple firing. There was a small metal flap at the nose of the spacecraft called the "spoiler". If the spacecraft started to reenter nose first (another stable reentry attitude for the capsule), airflow over the "spoiler" would flip the spacecraft around to the proper, heatshield first reentry attitude. Suborbital Mercury capsules encountered lower reentry temperatures and used beryllium heat-sink heat shields. Orbital missions encountered much higher atmospheric friction and temperatures during reentry and used ablative shields. NASA ordered 20 production spacecraft, numbered 1 through 20, from McDonnell Aircraft Company, St. Louis, Missouri. Five of the twenty spacecraft were not flown. They were, Spacecraft #10, 12, 15, 17, and 19. Two unmanned spacecraft were destroyed during flights. They were Spacecraft #3 and #4. Spacecraft #11 sank and was recovered from the bottom of the Atlantic Ocean after 38 years. Some spacecraft were modified after initial production (refurbished after launch abort, modified for longer missions, etc) and received a letter designation after their number, examples 2B, 15B. Some spacecraft were modified twice, example, spacecraft 15 became 15A and then 15B. A number of boilerplate spacecraft (mockup/prototype/replica spacecraft, made from non-flight materials or lacking production spacecraft systems and/or hardware) were also made by NASA and McDonnell Aircraft and used in numerous tests, including launches.

Boosters

ablative The Mercury program used three boosters: Little Joe, Redstone, and Atlas. Little Joe was used to test the escape tower and abort procedures. Redstone was used for suborbital flights, and Atlas for orbital ones. Starting in October, 1958, Jupiter missiles were also considered as suborbital launch vehicles for the Mercury program, but were cut from the program in July, 1959 due to budget constraints. The Atlas boosters required extra strengthening in order to handle the increased weight of the Mercury capsules beyond that of the nuclear warheads they were designed to carry. Little Joe was a solid-propellant booster designed specially for the Mercury program. The Titan missile was also considered for use for later Mercury missions, however the Mercury program was terminated before these missions were flown. The Titan was used for the Gemini program which followed Mercury

Astronauts

Gemini program The first Americans to venture into space were drawn from a group of 110 military pilots chosen for their flight test experience and because they met certain physical requirements. Seven of those 110 became astronauts in April 1959. Six of the seven flew Mercury missions (Deke Slayton was removed from flight status due to a heart condition). Beginning with Alan Shepard's Freedom 7 flight, the astronauts named their own spacecraft, and all added 7 to the name to acknowledge the teamwork of their fellow astronauts Mercury had seven prime astronauts, all former military test pilots, known as the Mercury 7. NASA announced the selection of these astronauts on April 9, 1959.
- M. Scott Carpenter (1925-)
- L. Gordon Cooper, Jr. (1927-2004)
- John H. Glenn. Jr. (1921-)
(first American to orbit the earth)
- Virgil I. "Gus" Grissom (1926-1967)
- Walter M. Schirra, Jr. (1923-)
- Alan B. Shepard, Jr. (1923-1998)
(first American in space)
- Donald K. "Deke" Slayton (1924-1993)
(grounded in 1962 due to irregular heartbeat, reinstated in 1972 and later flew on Apollo-Soyuz Test Project in 1975)

Flights

The program included 20 robotic launches. Not all of these were intended to reach space and not all were successful in completing their objectives. The fifth flight in 1959 launched a monkey named Sam (a rhesus monkey named after the Air Force School of Aviation Medicine) into space. Other non-human space-farers were Miss Sam (a rhesus monkey), Ham and Enos, both chimpanzees. The Mercury program used the following launch vehicles:
- Little Joe - Suborbital, robotic, and primate flights. Launch escape system tests
- Redstone - Suborbital robotic, primate and piloted orbital flights.
- Atlas - Suborbital robotic, robotic, primate, and piloted orbital flights.

Robotic

- Mercury-Jupiter - Cancelled in July, 1959 - Proposed suborbital launch vehicle for Mercury. Not flown.
- Little Joe 1 - August 21, 1959 - test of launch escape system during flight
- Big Joe 1 - September 9, 1959 - test of heat shield and Atlas / spacecraft interface
- Little Joe 6 - October 4, 1959 - Test of capsule aerodynamics and integrity
- Little Joe 1A - November 4, 1959 - test of launch escape system during flight
- Little Joe 2 - December 4, 1959 - carried Sam the monkey to 85 kilometres in altitude
- Little Joe 1B - January 21, 1960 - carried Miss Sam the monkey to 9.3 statute miles (15 kilometres) in altitude
- Beach Abort - May 9, 1960 - test of the Off-The-Pad abort system
- Mercury-Atlas 1 - July 29, 1960 - first flight of Mercury spacecraft and Atlas Booster
- Little Joe 5 - November 8, 1960 - first flight of a production Mercury spacecraft
- Mercury-Redstone 1 - November 21, 1960 - Launched 4 inches (100 mm). Settled back on pad due to electrical malfunction
- Mercury-Redstone 1A - December 19, 1960 - first flight of Mercury spacecraft and Redstone booster
- Mercury-Redstone 2 - January 31, 1961 - carried Ham the Chimpanzee on suborbital flight
- Mercury-Atlas 2 - February 21, 1961 - test of Mercury spacecraft and Atlas Booster
- Little Joe 5A - March 18, 1961 - test of the launch escape system during the most severe conditions of a launch
- Mercury-Redstone BD - March 24, 1961 - Redstone Booster Development - test flight
- Mercury-Atlas 3 - April 25, 1961 - test of Mercury spacecraft and Atlas Booster
- Little Joe 5B - April 28, 1961 - test of the launch escape system during the most severe conditions of a launch
- Mercury-Atlas 4 - September 13, 1961 - test of Mercury spacecraft and Atlas Booster
- Mercury-Scout 1 - November 1, 1961 - test of Mercury tracking network
- Mercury-Atlas 5 - November 29, 1961 - carried Enos the Chimpanzee on a two orbit flight

Primate flights

- Little Joe 2 - December 4, 1959 - carried Sam the monkey to 85 kilometres in altitude
- Little Joe 1B - January 21, 1960 - carried Miss Sam the monkey to 9.3 statute miles (15 kilometres) in altitude
- Mercury-Redstone 2 - January 31, 1961 - carried Ham the Chimpanzee on suborbital flight
- Mercury-Atlas 5 - November 29, 1961 - carried Enos the Chimpanzee on a two orbit flight

Piloted

Suborbital

- Mercury-Redstone 3 (Freedom 7) - 5 May 1961 - Alan Shepard
- Mercury-Redstone 4 (Liberty Bell 7) - 21 July 1961 - Gus Grissom

Orbital

- Mercury Atlas 6 (Friendship 7) - 20 February 1962 - John Glenn
- Mercury-Atlas 7 (Aurora 7) - 24 May 1962 - Scott Carpenter (replaced Deke Slayton)
- Mercury-Atlas 8 (Sigma 7) - 3 October 1962 - Wally Schirra
- Mercury-Atlas 9 (Faith 7) - 15 May 1963 - Gordon Cooper
- Mercury-Atlas 10 (Freedom 7-II) - October 1963 - Cancelled June 13, 1963 1963 1963

Piloted Mercury launches

1963

Mercury Flight insignias

Flight patches are available to the public that purport to be patches from various Mercury missions. In reality, these patches were designed long after the Mercury program ended by private entrepreneurs. When genuine flight patches were created by crews in the Gemini program, this caused a public demand for Mercury flight patches, which was filled by these private entrepreneurs. The only patches the Mercury astronauts wore were the NASA logo and a name tag. Each manned Mercury spacecraft, however, was decorated with a flight insignia. These are the genuine Mercury flight insignias. They were approved by the Mercury astronauts and painted on their spacecraft. Each flight insignia is illustrated in the photo above.

Follow-on programs

Miscellaneous

The Mercury astronauts trained, in part, at Langley Air Force Base in Hampton, Virginia, under Flight Surgeon William K. Douglas and Keith G. Lindell (COL, USAF). Several bridges throughout the city bear the name of the Mercury astronauts, and the main route in the city is named Mercury Boulevard, honoring the Mercury program. The names of five of the Mercury astronauts are also commemorated in the popular 1960s TV show Thunderbirds. In the series, Jeff Tracy, the founder of the fictional International Rescue organisation, is a millionaire ex-astronaut who has named his five sons -- Scott, Virgil, Alan, John and Gordon -- after the real-life Mercury astronauts.

External links

- [http://www-pao.ksc.nasa.gov/kscpao/history/mercury/mercury.htm The Mercury Project (Kennedy Space Center)]
- [http://history.nasa.gov/SP-4001/contents.htm Project Mercury A Chronology (Prepared by James M. Grimwood)]
- [http://history.nasa.gov/SP-4003/cover.htm Space Medicine In Project Mercury By Mae Mills Link]
- [http://www.hq.nasa.gov/office/pao/History/diagrams/mercury.html Project Mercury Drawings and Technical Diagrams]
- [http://www.hq.nasa.gov/office/pao/History/diagrams/diagrams.htm Technical Diagrams and Drawings]
- [http://www.geocities.com/atlas_missile/mercury.htm Mercury-Atlas Diagrams]
- [http://projectmercury5.moonport.org Project Mercury Simulator for the PC (Orbiter)]
- [http://youarego.com Project Mercury Simulator for the Mac]
- [http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19670028606_1967028606.pdf The Mercury Redstone Project (PDF) December 1964]
- [http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19740076527_1974076527.pdf Project Mercury familiarization manual (PDF) November 1961]
- [http://www.ibiblio.org/mscorbit/document.html Various PDFs of historical Mercury documents including familiarization manuals.] Category:Manned spacecraft Category:Human spaceflight programmes
- ja:マーキュリー計画

Soyuz programme

The Soyuz human spaceflight programme was initiated in the early 1960s as part of the manned lunar programme that was intended to put a Soviet cosmonaut on the Moon. The Soyuz spacecraft and the Soyuz launch vehicle are both part of this programme. The Moon objective was abandoned when technological problems meant that the US would reach the Moon first. Soyuz survived the demise of the manned lunar programme in that it developed into a variety of projects (both military and civilian), mostly in conjunction with space stations. The manned Soyuz spacecraft can be classified into design generations. Soyuz 1 through 11 (1967-1971) were first-generation vehicles, carrying a crew of up to three without spacesuits and distinguished from those following by their bent solar panels and their use of the Igla automatic docking navigation system, which required special radar antennas. This first generation encompassed the original Soyuz and Salyut 1 Soyuz. Variations within it were primarily docking fixtures; the first nine examples had no internal hatch and crew transfer had to take place by means of spacewalks, employing spacesuits kept in the orbital module, which functioned as an airlock. The second generation, the Soyuz Ferry, comprised Soyuz 12 through 40 (1973-1981). Although still using the Igla system, these had no solar panels, employing batteries; the crew could now wear spacesuits throughout their flight, though their number was reduced to two. ASTP Soyuz served as a technological bridge to the third generation Soyuz-T spacecraft (1976-1986). These used new flat solar panels and could carry a crew of three, now wearing spacesuits. Soyuz-TM was fourth generation (1986-2003) and used for ferry flights to the Mir space station. These had a new, more fault-tolerant automatic docking navigation system, called Kurs, meaning "course." The Soyuz-TMA (2003- ) is the latest design developed as a ferry craft and assured crew return vehicle for the International Space Station. It is able to accommodate taller occupants with new adjustable crew couches. The basic Soyuz design was the basis for many projects, many of which never came to light. Its earliest form was intended to travel to the moon without employing a huge booster like the Saturn V or the Soviet N-1 by repeatedly docking with upper stages that had been put in orbit using the same rocket as the Soyuz. This and the initial civilian designs were done under the Soviet Chief Designer Sergei Pavlovich Korolev, who did not live to see the craft take flight. Several military derivatives actually took precedence in the Soviet design process, though they never came to pass. The Zond spacecraft was another derivative, designed to take a crew traveling in a figure-of-eight orbit around the Earth and the moon but never achieving the degree of safety or political need to be used for such. Finally, the Progress series of unmanned cargo ships for the Salyut and Mir space laboratories used the automatic navigation and docking mechanism, but not the re-entry capsule, of Soyuz. As of 2005, Soyuz derivatives provide Russia's human spaceflight capability and are used to ferry personnel and supplies to and from the International Space Station. International Space Station International Space Station International Space Station

Soyuz Manned Flights

Soyuz Unmanned Flights

Category:Human spaceflight programmes Category:Soyuz programme ja:ソユーズ

Soyuz T-10-1

Crew

- Vladimir Titov (1)
- Gennady Strekalov (3)

Mission Parameters

- Mass: 6850 kg
- Perigee: N/A km
- Apogee: N/A km
- Inclination: N/A°
- Period: N/A minutes

Mission Highlights

The Soyuz T-10-1 mission (often called Soyuz-T 10a in the West) never lifted off, the launch vehicle being destroyed on the launch pad by fire. Fortunately the Soyuz spacecraft's escape rocket fired two seconds before the launch vehicle exploded, saving the crew. Shortly before the planned liftoff fuel spilled around the base of the Soyuz launch vehicle and caught fire. Launch control activated the escape system but the control cables had already burned, and the crew could not activate or control the escape system themselves. Twenty seconds later ground control was finally able to activate the escape system by radio command, by which time the booster was engulfed in flames. Explosive bolts fired to separate the descent module from the service module and the upper launch shroud from the lower. Then the escape system motor fired, dragging the orbital module and descent module, encased within the upper shroud, free of the booster with an acceleration of 14 to 17 G (137 to 167 m/s²) for five seconds. Two seconds after the escape system activated the booster exploded, destroying the launch complex (which was, incidentally, the one used to launch Sputnik 1 and Vostok 1). Four paddle-shaped stabilizers on the outside of the shroud opened and the descent module separated from the orbital module at an altitude of 650 m, dropping free of the shroud. The descent module discarded its heat shield, exposing the solid-fuel landing rockets, and deployed a fast-opening emergency parachute. Landing occurred about 4 kilometers from the launch pad.

September 26

September 26 is the 269th day of the year (270th in leap years) in the Gregorian Calendar, with 96 days remaining.

Events

- 46 BC - Julius Caesar dedicates a temple to his mythical ancestor Venus Genetrix in fulfilment of a vow he made at the battle of Pharsalus.
- 1580 - Sir Francis Drake circumnavigates the globe.
- 1687 - The Parthenon in Athens is partially destroyed after an explosion caused by the bombing from Venetian forces led by Morosini who were besieging the Ottoman Turks stationed in Athens.
- 1777 - British troops occupy Philadelphia, Pennsylvania during the American Revolution.
- 1789 - Thomas Jefferson is appointed the first United States Secretary of State, John Jay is appointed the first Chief Justice of the United States, Samuel Osgood is appointed the first United States Postmaster General, and Edmund Randolph is appointed the first United States Attorney General.
- 1810 - A new Act of Succession is adopted by the Riksdag of the Estates and Jean Baptiste Bernadotte becomes heir to the Swedish throne.
- 1907 - New Zealand and Newfoundland each becomes a dominion of the British Empire.
- 1914 - The US Federal Trade Commission (FTC) is established by the Federal Trade Commission Act.
- 1918 - World War I: Battle of Meuse.
- 1934 - Steamship RMS Queen Mary is launched.
- 1944 - World War II: Operation Market Garden fails.
- 1950 - United Nations troops recapture Seoul from the North Koreans.
- 1954 - Japanese rail ferry Toya Maru sinks during a typhoon in the Tsugaru Strait, Japan killing 1,172.
- 1957 - Leonard Bernstein's West Side Story opens on Broadway
- 1960 - In Chicago, Illinois, the first televised debate takes place between presidential candidates Richard M. Nixon and John F. Kennedy.
- 1961 - Bob Dylan makes his public debut.
- 1962 - Yemen Arab Republic is proclaimed
- 1962 - Premiere of The Beverly Hillbillies on CBS.
- 1969 - The Chicago Seven trial begins.
- 1969 - The Beatles album Abbey Road is released in the UK.
- 1973 - Concorde makes its first non-stop crossing of the Atlantic in record-breaking time.
- 1970 - The Laguna Fire starts in San Diego County, California, burning 175,425 acres (710 km²).
- 1981 - Baseball: Nolan Ryan sets a Major League record by throwing his fifth no-hitter.
- 1983 - Soviet military officer Stanislav Petrov averts a worldwide nuclear war.
- 1983 - Australia II, the first non-American winner, wins the Americas Cup.
- 1984 - United Kingdom agrees handover of Hong Kong.
- 1988 - Ben Johnson is stripped of his gold medal in the 100 m sprint at the Seoul Olympics for failing a drug test.
- 1991 - Biosphere 2 opens.
- 1996 - Nintendo 64 went on sale in the United States.
- 1997 - A Garuda Indonesia Airbus A-300 crashes near Medan, Indonesia, airport, killing 234
- 1997 - An earthquake strikes the Italian regions of Umbria and the Marche, causing part of the Basilica of St. Francis at Assisi to collapse.
- 2001 - Anti-globalization protests in Prague (some 20,000 protesters) police turned violent during the IMF and World Bank summits.
- 2001 - Star Trek: Enterprise begins airing in the US.
- 2002 - The overcrowded Senegalese ferry Joola capsizes off the coast of Gambia killing 1,836 people.
- 2002 - Thirty people are killed in a gun attack at a temple in Gandhinagar, India
- 2002 - Five people are shot dead in a botched bank robbery in Norfolk, Nebraska, United States.
- 2005 - The shock elimination of favoured to win, Teresa Bergman, on New Zealand Idol.

Births

- 1406 - Thomas de Ros, 9th Baron de Ros, English soldier and politician (d. 1430)
- 1711 - Richard Grenville-Temple, 2nd Earl Temple, English politician (d. 1779)
- 1750 - Cuthbert Collingwood, 1st Baron Collingwood, British admiral (d. 1810)
- 1774 - Johnny Appleseed, American environmentalist (d. 1847)
- 1791 - Théodore Géricault, French painter (d. 1824)
- 1869 - Komitas, Armenian composer (d. 1935)
- 1870 - King Christian X of Denmark (d. 1947)
- 1871 - Winsor McCay, American cartoonist (d. 1934)
- 1873 - Aleksey Shchusev, Russian architect (d. 1949)
- 1874 - Lewis Hine, American photographer and social activist (d. 1940)
- 1875 - Edmund Gwenn, Welsh actor (d. 1959)
- 1876 - Edith Abbott, American social worker, educator, and author (d. 1957)
- 1877 - Ugo Cerletti, Italian neurologist (d. 1963)
- 1877 - Alfred Cortot, Swiss pianist (d. 1962)
- 1886 - Archibald Vivian Hill, English physiologist, Nobel Prize laureate (d. 1977)
- 1887 - Antonio Moreno, Spanish-born actor (d. 1967)
- 1887 - Sir Barnes Neville Wallis, British scientist, engineer and inventor (d. 1979)
- 1888 - J. Frank Dobie, American folklorist and newspaper columnist (d. 1964)
- 1888 - T. S. Eliot, American writer and editor, Nobel Prize laureate (d. 1965)
- 1889 - Martin Heidegger, German philosopher (d. 1976)
- 1891 - Charles Munch, French conductor and violinist (d. 1968)
- 1895 - George Raft, American actor (d. 1980)
- 1897 - Arthur Rhys Davids, English pilot (d. 1917)
- 1897 - Pope Paul VI (d. 1978)
- 1898 - George Gershwin, American composer (d. 1937)
- 1907 - Anthony Blunt, English art historian and Soviet spy (d. 1983)
- 1907 - Bep van Klaveren, Dutch boxer (d. 1992)
- 1909 - Bill France, Sr., American founder of NASCAR (d. 1992)
- 1914 - Jack LaLanne, American fitness advocate
- 1923 - Dev Anand, Indian actor and film producer
- 1925 - Marty Robbins, American singer (d. 1982)
- 1926 - Masatoshi Koshiba, Japanese physicist, Nobel Prize laureate
- 1926 - Julie London, American singer and actress (d. 2000)
- 1930 - Fritz Wunderlich, German tenor (d. 1966)
- 1932 - Richard Herd, American actor
- 1932 - Dr. Manmohan Singh, Prime Minister of India
- 1932 - Vladimir Voinovich, Russian writer and dissident
- 1933 - Donna Douglas, American actress
- 1936 - Winnie Mandela, South African anti-apartheid activist
- 1942 - Kent McCord, American actor
- 1943 - Ian Chappell, Australian test cricket player and broadcaster
- 1944 - Anne Robinson, British television host
- 1945 - Bryan Ferry, British singer
- 1946 - Andrea Dworkin, American feminist (d. 2005)
- 1946 - Christine Todd Whitman, American politician
- 1947 - Lynn Anderson, American singer
- 1948 - Olivia Newton-John, Australian singer
- 1949 - Clodoaldo, Brazilian football player
- 1951 - Stuart Tosh, Scottish musician
- 1954 - Kevin Kennedy, baseball manager and television host
- 1956 - Linda Hamilton, American actress
- 1962 - Melissa Sue Anderson, American actress
- 1963 - Lysette Anthony, British actress
- 1967 - Shannon Hoon, American singer (Blind Melon) (d. 1995)
- 1968 - James Caviezel, American actor
- 1973 - Chris Small, Scottish snooker player
- 1974 - Martin Müürsepp, Estonian basketball player
- 1975 - Emma Härdelin, Swedish singer (Garmarna and Triakel)
- 1976 - Michael Ballack, German footballer
- 1976 - Yoshiko Horie, Japanese singer and voice actor.
- 1981 - Christina Milian, American actress and singer
- 1981 - Serena Williams, American tennis player

Deaths

- 1417 - Francesco Zabarella, Italian jurist (b. 1360)
- 1468 - Juan de Torquemada, Spanish Catholic cardinal (b. 1388)
- 1626 - Wakisaka Yasuharu, Japanese warrior (b. 1554)
- 1763 - John Byrom, English poet (b. 1692)
- 1764 - Benito Jerónimo Feijóo y Montenegro, Spanish scholar (b. 1767)
- 1802 - Baron Jurij Vega, Slovenian mathematician, physicist, and military officer (b. 1754)
- 1820 - Daniel Boone, American frontiersman (b. 1734)
- 1868 - August Ferdinand Möbius, German mathematician and astronomer (b. 1790)
- 1877 - Hermann Grassmann, German mathematician and physicist (b. 1809)
- 1904 - John F. Stairs, Canadian businessman and statesman (b. 1848)
- 1937 - Bessie Smith, American singer (b. 1894)
- 1945 - Béla Bartók, Hungarian composer (b. 1881)
- 1947 - Hugh Lofting, British writer (b. 1886)
- 1952 - George Santayana, Spanish philosopher (b. 1863)
- 1965 - James Fitzmaurice, Irish aviation pioneer (b. 1898)
- 1972 - Charles Correll, American radio actor (b. 1890)
- 1976 - Lavoslav Ružička, Croatian chemist, Nobel Prize laureate (b. 1887)
- 1978 - Manne Siegbahn, Swedish physicist, Nobel Prize laureate (b. 1886)
- 1984 - John Facenda, American broadcaster and sports announcer (b. 1913)
- 1998 - Betty Carter, American singer (b. 1930)
- 2000 - Richard Mulligan, American actor (b. 1932)
- 2003 - Robert Palmer, British singer (b. 1949)

Holidays and observations

- Calendar of Saints - Sts. Cosmas and Damian Also see September 26 (Eastern Orthodox liturgics)
- Discordianism - Bureflux
- [http://www.ecml.at/edl/ European Day of Languages]

External links

- [http://news.bbc.co.uk/onthisday/hi/dates/stories/september/26 BBC: On This Day] ---- September 25 - September 27 - August 26 - October 26 - more historical anniversaries ko:9월 26일 ms:26 September ja:9月26日 simple:September 26 th:26 กันยายน

Vostok program

The Vostok programme (Восто́к, translated as "East") was a Soviet human spaceflight project that succeeded in putting a person into Earth orbit for the first time. The programme developed the Vostok spacecraft from the Zenit photo-reconnaissance project and adapted the Vostok rocket from an existing ICBM design. Just before the first release of the name Vostok to the press, it was a classified word. A series of prototype Vostoks, including at least five with animals and some with a test dummy aboard, were used to qualify the spacecraft for human flight. Dates given are dates of spacecraft launch. ICBM
- Sputnik 4 (Korabl-Sputnik 1) - May 15, 1960.
- Sputnik 5 (Korabl-Sputnik 2) - August 19, 1960.
- Sputnik 6 (Korabl-Sputnik 3) - December 1, 1960.
- Sputnik 9 (Korabl-Sputnik 4) - March 9, 1961.
- Sputnik 10 (Korabl-Sputnik 5) - March 25, 1961.
- Vostok 1 - April 12, 1961. First human spaceflight.
- Vostok 2 - August 6, 1961. First full day in space.
- Vostok 3 - August 11, 1962, and Vostok 4 - August 12, 1962. First dual flight.
- Vostok 5 - June 14, 1963. Longest solo spaceflight of the twentieth century.
- Vostok 6 - June 16, 1963. First woman in space. Another seven Vostok flights were originally planned, going through to the April of 1966, but these were cancelled as the race to the moon intensified. Vostok was followed by the Voskhod programme.

Project Gemini

Project Gemini was the second human spaceflight program in which the United States of America sent humans into space, between Projects Mercury and Apollo, during the years 1963-1966. Its objective was to develop techniques for advanced space travel, notably those necessary for Apollo, whose objective was to land men on the Moon. Gemini missions involved extravehicular activity and orbital maneuvers including rendezvous and docking. Gemini was originally seen as a simple extrapolation of the Mercury program, and thus early on was called Mercury Mark II. The final program had little in common with Mercury and was in fact superior to even Apollo in some ways. (See Big Gemini.) This was mainly a result of its late start date, which allowed it to benefit from much that had been learned by that time on the Apollo project (which, despite its later launch dates, was actually begun before Gemini). Its primary difference from Mercury was that the earlier spacecraft had all systems other than the reentry rockets sited within the capsule, nearly all of which had to be accessed through the astronaut's hatchway, while Gemini had many power, propulsion, and life-support systems in a detachable module like a huge bowl; many components in the capsule itself were reachable each through its own small access door. The original intention was for Gemini to use a paraglider instead of a parachute, and the crew to be seated upright controlling the forward motion of the craft before its landing. To facilitate this, the parachute cord does not just attach to the nose of the craft; there is an additional attachment point for balance near the heat shield. This cord is covered by a strip of metal between the doors. Early, short-duration missions had their electrical power supplied by batteries; later endurance missions had the first fuel cells in manned spacecraft. The "Gemini" designation comes from the fact that each spacecraft held two men, as "gemini" in Latin means "twins". Gemini is also the name of the third constellation of the Zodiac and its twin stars, Castor and Pollux. Unlike Mercury, which could only change its orientation in space, the Gemini capsule could alter its own orbit. It could also dock with other spacecraft--one of which, the Agena Target Vehicle, had its own large rocket engine which was used to perform large orbital changes. Gemini was the first American manned spacecraft to include an onboard computer, the Gemini Guidance Computer, to facilitate management and control of mission maneuvers. The main contractor was McDonnell who had lost out on main contracts for the Apollo Project. McDonnell sought to extend the program by proposing a Gemini craft could be used to fly a cislunar mission and even achieve a manned lunar landing earlier and at less cost than Apollo but these were rejected. The Gemini program cost $5.4 billion in 1994 dollars. See NASA Budget.

Announcement

The National Aeronautics and Space Administration NASA announced December 7, 1961, a plan to extend the existing manned space flight program by development of a two-man spacecraft. The program was officially designated Gemini on January 3, 1962.

Team

The Gemini program was managed by the Manned Spacecraft Center, Houston, Texas, under direction of the Office of Manned Space Flight, NASA Headquarters, Washington, D.C, Dr. George E. Mueller, Associate Administrator of NASA for Manned Space Flight, served as acting director of the Gemini program. William C. Schneider, Deputy Director of Manned Space Flight for Mission Operations, served as Mission Director on all Gemini flights beginning with Gemini V. The Manned Spacecraft Center Gemini effort was headed by Dr. Robert R. Gilruth, director of the Center, and Charles W. Matthews, Gemini Program Manager.

Program objectives

The Gemini Program was conceived after it became evident to NASA officials that an intermediate step was required between the projects Mercury and Apollo. The major objectives assigned to Gemini were:
- To subject two men and supporting equipment to long-duration flights, a requirement for projected later trips to the moon or deeper space.
- To effect rendezvous and docking with other orbiting vehicles, and to maneuver the docked vehicles in space, using the propulsion system of the target vehicle for such maneuvers.
- To perfect methods of reentry and landing the spacecraft at a pre-selected land-landing point.
- To gain additional information concerning the effects of weightlessness on crew members and to record the physiological reactions of crew members during long duration flights.

Gemini Applications

The United States Air Force had an interest in the system, and decided to use their own modification of the spacecraft as the crew vehicle for the Manned Orbiting Laboratory. To this end, one of the unmanned Gemini spacecraft was refurbished and flown again atop a mockup of the MOL, sent into space by a Titan III-M. This was the first time a spacecraft went into space twice. The USAF also had the notion of adapting the Gemini spacecraft for trying out military applications, such as crude observation of the ground (no specialized reconnaissance camera could be carried) and practicing making rendezvous with suspicious satellites. This project was called Blue Gemini. The US Air Force did not like the fact that Gemini would have to be recovered by the US Navy, so they intended for Blue Gemini eventually to use the paraglider and land on three skids, something from the original design of Gemini. At first some within NASA welcomed sharing of the cost with the USAF, but it was later agreed that NASA was better off operating Project Gemini by itself. MOL was cancelled in 1968 and Blue Gemini too was cancelled without any use by military astronauts.

Missions

1968 and Thomas Stafford aboard]] Gemini involved 12 flights, including two unmanned flight tests of the equipment.

Unmanned

- Gemini 1 - First test flight of Gemini; April 8-12, 1964
- Gemini 2 - Suborbital flight to test heat shield; January 19, 1965

Manned

- Gemini III , MOLLY BROWN March 23, 1965 Virgil "Gus" Grissom, John W. Young 04 hours, 52 minutes 31 seconds First manned Gemini flight, three orbits. The only major incident during the mission involved a contraband corned beef sandwich that Young had snuck on board. The crew each took a few bites before the sandwich had to be restowed. The crumbs it released could have wreaked havoc with the craft's electronics, so the crew were reprimanded when they returned to Earth. The capsule's name, 'Molly Brown', was a reference to the musical "The Unsinkable Molly Brown", and was allegedly chosen by Grissom in honour of his Mercury capsule ("Liberty Bell 7"), which did sink. Following this, Nasa banned crews from naming their vehicles until relatively late in the Apollo program, and even then only with supervision.
- Gemini IV June 03-07, 1965 James A. McDivitt, Edward H. White II 4 days 1 hour 56 min 12 seconds Included first extravehicular activity (EVA) by an American; White's "space walk" was a 22 minute EVA exercise.
- Gemini V August 21-29, 1965 L. Gordon Cooper Jr., Charles Conrad Jr. 7 days 22 hours 55 min 14 seconds First week-long flight First use of fuel cells for electrical power; evaluated guidance and navigation system for future rendezvous missions. Completed 120 orbits.
- Gemini VII December 04-18, 1965 Frank Borman, James A. Lovell Jr. 13 days, 18 hours, 35 minutes 1 seconds When the original Gemini VI mission was scrubbed because its Agena target for rendezvous and docking failed, Gemini VII was used for the rendezvous instead. Primary objective was to determine whether humans could live in space for 14 days.
- Gemini VI-A December 15-16, 1965 Walter M. Schirra Jr., Thomas P. Stafford 1 Day 1 hour 51 min 24 seconds First space rendezvous accomplished with Gemini VII, station-keeping for over five hours at distances from 0.3 to 90 m (1 to 295 ft).
- Gemini VIII March 16, 1966 Neil A. Armstrong, David R. Scott 10 hours, 41 minutes 26 seconds Accomplished first docking with another space vehicle, an unmanned Agena stage. A malfunction caused uncontrollable spinning of the craft; the crew undocked and effected the first emergency landing of a manned U.S. space mission.
- Gemini IX June 03-06, 1966 Thomas P. Stafford, Eugene A. Cernan 3 days, 21 hours Rescheduled from May to rendezvous and dock with augmented target docking adapter (ATDA) after original Agena target vehicle failed to orbit. ATDA shroud did not completely separate, making docking impossible. Three different types of rendezvous, two hours of EVA, and 44 orbits were completed.
- Gemini X July 18-21, 1966 John W. Young, Michael Collins 2 days 22 hours 46 min 39 seconds First use of Agena target vehicle's propulsion systems. Spacecraft also rendezvoused with Gemini VIII target vehicle. Collins had 49 minutes of EVA standing in the hatch and 39 minutes of EVA to retrieve experiment from Agena stage. 43 orbits completed.
- Gemini XI September 12-15, 1966 Charles Conrad Jr., Richard F. Gordon Jr. 2 days 23 hours 17 min 8 seconds Gemini record altitude, 1,189.3 km (739.2 mi) reached using Agena propulsion system after first orbit rendezvous and docking. Gordon made 33-minute EVA and two-hour standup EVA. 44 orbits.
- Gemini XII November 11-15, 1966 James A. Lovell Jr., Edwin "Buzz" Aldrin 3 days, 22 hours, 34 minutes 31 seconds Final Gemini flight. Rendezvoused and docked manually with its target Agena and kept station with it during EVA. Aldrin set an EVA record of 5 hours, 30 minutes for one space walk and two stand-up exercises.

Crew Selection

Deke Slayton as head of the Astronaut Office had the main role in choice of crews for the Gemini program. This selection process, with the prospect of more ambitious missions that would follow with Apollo, became even more political that with the Mercury Program. With Gemini it became a procedure that each flight had a prime crew and back up crew and that the back up crew would rotate to prime crew status three flights later. Slayton also sought that first choice of mission Commands would be given to the original Mercury Seven astronauts (excepting John Glenn who retired from NASA in January 1964, Scott Carpenter who was not acceptable to NASA management, and Gordon Cooper was questionable). In late 1963, Slayton choose Alan Shepard and Thomas Stafford for Gemini 3, James McDivitt and Ed White for Gemini 4, and Wally Schirra and John Young for Gemini 5 (the first Agena rendezvous mission). Gemini 3 was backed up by Gus Grissom and Frank Borman who were also slated for Gemini 6 the first long duration mission. Finally Pete Conrad and James Lovell were assigned as the backup for Gemini 4 Delays in the production of the Agena Target Vehicle caused the first rearrangement of the crew rotation. Schirra and Young mission was bumped to Gemini-6 and now were the backup for Shepard and Stafford. Grissom and Borman now had their long duration mission assigned to Gemini 5. The second rearrangment occurred when Alan Shepard developed Meniere's disease, an inner ear problem. Gus Grissom was moved to command Gemini 3. Slayton felt that Young was a better personality match and switched Stafford and Young. Finally Slayton tapped Gordon Cooper to command the long duration Gemini 5. Again for reasons of compatibility he move Pete Conrad from being the backup commander of Gemini 4 to the pilot of Gemini 5 and Frank Borman to the backup command of Gemini 4. Finally he assign Neil Armstrong and Elliot See to be the backup crew for Gemini 5. The third rearrangement of crew assignment occurred when Deke Slayton felt that Elliot See wasn't up to the physical demands of EVA on Gemini 8. He placed Elliot See as the prime commander of Gemini 9 and put Dave Scott as pilot of Gemini 8 and Charles Bassett as the pilot of Gemini 9. The fourth and final rearrangement of the Gemini crew assignment occurred after the death of Elliot See and Charles Bassett in a plane death in St. Louis. The backup crew of Tom Stafford and Eugene Cernan was moved up to become the new prime crew of Gemini 9. James Lovell and Edwin "Buzz" Aldrin was moved from being the backup crew of Gemini 10 to the backup crew of Gemini 9. This cleared the way through the crew rotation for Lovel and Aldrin to become the prime crew of Gemini 12. Along with the death of Grissom, White, and Chaffee in the fire of Apollo 1, this rearrangement is what finally determined the makeup of the early Apollo crews. These events were decisive in determining who would be in position to walk on the moon. In his autobiography "Deke!" Slayton relates that he would have probably replaced Aldrin with the backup pilot for Gemini 12 Eugene Cernan if the second flight of the AMU had flow on Gemini 12.

Gemini-Titan launches and serial numbers

Gemini 4 The Gemini-Titan launch vehicles, like the Mercury-Atlas vehicles before them, were ordered by NASA through the U. S. Air Force and were in reality missiles. The Gemini-Titan II rockets were assigned U.S. Air Force serial numbers, which were painted in four places on each Titan II (on opposite sides on each of the first and second stages). U.S. Air Force crews maintained Launch Complex 19 and prepared and launched all of the Gemini-Titan II launch vehicles. Atlas These are the USAF serial numbers assigned to the Gemini-Titan launch vehicles. They were ordered in 1962 so the serial is "62-12XXX", but only "12XXX" is painted on the Titan II:
- 12556 - GLV-1 - Gemini 1
- 12557 - GLV-2 - Gemini 2
- 12558 - GLV-3 - Gemini 3
- 12559 - GLV-4 - Gemini 4
- 12560 - GLV-5 - Gemini 5
- 12561 - GLV-6 - Gemini 6A
- 12562 - GLV-7 - Gemini 7
- 12563 - GLV-8 - Gemini 8
- 12564 - GLV-9 - Gemini 9A
- 12565 - GLV-10 - Gemini 10
- 12566 - GLV-11 - Gemini 11
- 12567 - GLV-12 - Gemini 12
- 12568 - GLV-13 Ordered by NASA 1962, not built, cancelled July 30, 1964
- 12569 - GLV-14 Ordered by NASA 1962, not built, cancelled July 30, 1964
- 12570 - GLV-15 Ordered by NASA 1962, not built, cancelled July 30, 1964

External links:

- [http://www.hq.nasa.gov/office/pao/History/SP-4203/toc.htm On the Shoulders of Titans: A History of Project Gemini by Barton C. Hacker and James M. Grimwood]
- [http://www-pao.ksc.nasa.gov/kscpao/history/gemini/gemini.htm John F. Kennedy Space Center - The Gemini Program]
- [http://science.ksc.nasa.gov/history/gemini/gemini.html NASA Project Gemini site]
- [http://www.thespaceplace.com/history/gemini2.html Space history: Gemini Program space history - Gemini missions spaceflight]
- [http://www.hq.nasa.gov/office/pao/History/diagrams/gemini.html Project Gemini Drawings and Technical Diagrams]
- [http://www.hq.nasa.gov/office/pao/History/diagrams/diagrams.htm Technical Diagrams and Drawings]
- [http://www.ibiblio.org/mscorbit/document.html Gemini familiarization Manuals (PDF).] Apollo Category:Gemini program Category:Human spaceflight programmes Category:Manned spacecraft ja:ジェミニ計画

Ejection seat

In (mostly military) aircraft, the ejection seat is a system designed to rescue the pilot or other crew in the event of the aircraft becoming unflyable. In most designs, the seat is propelled out of the aircraft by a rocket motor, carrying the pilot with it. The concept of an ejectable escape capsule has also been tried. Once clear of the aircraft, the ejection seat deploys a parachute, and descends safely to earth.

History

While a bungee-assisted escape from an aircraft took place in 1910, the ejection seat as we recognise it today was invented in Germany during World War II. Prior to this, the only means of escape from an incapacitated aircraft was to jump clear, and in many cases this was difficult due to injury, the difficulty of egress from a confined space, the airflow past the aircraft and other factors. The first ejection seats were developed during the war by Heinkel. Early models were powered by compressed air and the first aircraft to be fitted with such a system was the Heinkel He 280 prototype jet fighter in 1941. One of the He 280 test pilots, Helmut Schenk, became the first person to escape from a stricken aircraft with an ejection seat on January 13, 1942 after his control surfaces iced up and became inoperable. This aircraft never reached production status, and the first operational type to provide ejection seats for the crew was the Heinkel He 219 night fighter in 1942. In late 1944, the Heinkel He 162 featured a new type of ejection seat, this time fired by an explosive cartridge. In this system the seat rode on wheels set between two pipes running up the back of the cockpit. When lowered into position, caps at the top of the seat fitted over the pipes to close them. Cartridges, basically identical to shotgun shells, were placed in the bottom of the pipes, facing upward. When fired the gases would fill the pipes, "popping" the caps off the end and thereby forcing the seat to ride up the pipes on its wheels, and out of the aircraft. After World War 2, the need for such systems became pressing, as aircraft speeds were getting ever higher, and it was not long before the sound barrier was broken. Manual escape at such speeds would be impossible. The United States Army Air Corps experimented with downward-ejecting systems operated by a spring, but it was the work of the British company Martin-Baker that was to prove crucial. The first live flight test of the M-B system took place on July 24, 1946, when Bernard Lynch ejected from a Gloster Meteor Mk III. Shortly afterwards, on August 17, 1946, 1st Sgt. Larry Lambert was the first live US ejectee. M-B ejector seats were fitted to prototype and production aircraft from the late 1940s, and the first emergency use of a Martin-Baker seat occurred in 1949 while testing the Armstrong-Whitworth AW.52 Flying Wing. Armstrong-Whitworth AW.52 Flying Wing. Stricklin was not injured.]] Early seats used a solid propellant charge to drive the seat out, by exploding the charge inside a telescoping tube attached to the seat. Effectively the seat was fired from the aircraft like a bullet from a gun. As jet speeds increased still further, this method proved inadequate to get the pilot sufficiently clear of the airframe, so experiments with rocket propulsion began. The F-102 Delta Dagger was the first aircraft to be fitted with a rocket propelled seat, in 1958. MB developed a similar design, using multiple rocket units feeding a single nozzle. This had the advantage of being able to eject the pilot to a safe height even if the aircraft itself was on or very near the ground. In the early 1960s, deployment began of rocket-powered ejection seats designed for bailout at supersonic speeds, in such planes as the F-106 Delta Dart. Six pilots have ejected at speeds exceeding 700 knots (805mph) and the highest altitude a M-B seat was deployed at was 57,000ft (from a Canberra in 1958). It has been rumoured but not confirmed that a SR-71 pilot ejected at Mach 3 at an altitude of 80,000ft. Despite these records, most ejections occur at fairly low speeds and at fairly low altitudes.

Pilot safety

The purpose of an ejection seat is pilot survival, not pilot comfort. Many pilots have suffered career-ending injuries while using ejection seats, including crushed vertebrae. The pilot typically experiences an acceleration of about 12 to 14 g (120 to 140 m/s²). Western seats usually impose lighter loads on the pilots; ex-Soviet technology often goes up to 20-22 Gs. Career-ending injuries are quite common, partly because eastern military pilots usually continue to fly into their late-40s or early-50s, while most western jet jockeys quit in their late-30's to pursue civilian life. By December 2003, Martin-Baker ejection seats had saved 7028 lives. The total figure for all types of ejector seats is unknown, but must be considerably higher.

Soviet K-36 series

The utmost in contemporary ejection seat technology is incorporated in the K-36 series designed by the Russian Zvezda bureau. The K-36D has repeatedly stunned the world with seemingly impossible crew rescue events in a series of high-profile accidents affecting ex-soviet fighter planes which participated at western airshows. The USA conducted tests of the upgraded, digitally-controlled "K-36 3.5" system, but refused to standardize it despite exceptional results. Some of the reasons were:
- The K-36 system is more than twice as heavy as the western ACES II (up to 225 kilograms vs. 90 kilograms)
- The bulbous headrest / parachute container of the K-36 seat greatly reduces the pilot's backwards field of vision
- The US mentality favours better armed and better cloaked planes, so that the pilot never gets shot down. Thus, the performance of crew ejection systems is less important. This, however, fails to address the issue of peacetime accidents, which account for the majority of crashes.

Non-standard ejection systems

The F-104 Starfighter was equipped, uniquely, with a downward firing ejection seat as the T-tail was judged likely to cut the pilot in half. In order to make this work, the pilot was equipped with "spurs" which were attached to cables that would pull the legs inwards so the pilot could be ejected. Note that such a system is of no use on or near the ground. Aircraft designed for low-level usage sometimes will have ejection seats which fire through the plastic of the canopy, as waiting for the canopy to be ejected is too slow. Many aircraft typ

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