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Hydyne
Hydyne is a mixture of 60% unsymmetrical dimethylhydrazine (UDMH) and 40% diethylenetriamine (DETA), developed in 1957 at Rocketdyne for use in liquid-fuel rockets.Morgan, George. It was created by Mary Sherman MorganAmerica's First Lady of Rocketry Caltech News, California Institute of Technology, Vol.42, No.1. Hydyne was used as the fuel for the first stage of the Juno I rocket that launched Explorer 1, the first successful satellite launch conducted by the United States. Improved performance In 1955 Wernher von Braun, employed by the U.S. Army, calculated his Redstone rocket could launch a satellite into orbit if its performance could be improved. A contract to develop a more powerful propellant was awarded to the Redstone's main stage builder, Rocketdyne. The contract required the replacement of the PGM-11 Redstone fuel (including 25% water and 75% ethyl alcohol) with a compound that would boost the rocket's performance by at least 8%. Mary Sherman Morgan was assigned to he ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Redstone Rocket
The PGM-11 Redstone was the first large American ballistic missile. A short-range ballistic missile (SRBM), it was in active service with the United States Army in West Germany from June 1958 to June 1964 as part of NATO's Cold War defense of Western Europe. It was the first US missile to carry a live nuclear weapon, nuclear warhead, in the 1958 Pacific Ocean weapons test, Hardtack Teak. The Redstone was a direct descendant of the German V-2 rocket, developed primarily by a team of List of German rocket scientists in the United States, German rocket engineers brought to the United States after World War II. The design used an upgraded engine from Rocketdyne that allowed the missile to carry the Mark 39 nuclear bomb, W39 warhead which weighed with its reentry vehicle to a range of about . Redstone's prime contractor was the Chrysler Corporation. The Redstone spawned the Redstone (rocket family), Redstone rocket family which holds a number of firsts in the US space program, nota ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PGM-11 Redstone
The PGM-11 Redstone was the first large American ballistic missile. A short-range ballistic missile (SRBM), it was in active service with the United States Army in West Germany from June 1958 to June 1964 as part of NATO's Cold War defense of Western Europe. It was the first US missile to carry a live nuclear warhead, in the 1958 Pacific Ocean weapons test, Hardtack Teak. The Redstone was a direct descendant of the German V-2 rocket, developed primarily by a team of German rocket engineers brought to the United States after World War II. The design used an upgraded engine from Rocketdyne that allowed the missile to carry the W39 warhead which weighed with its reentry vehicle to a range of about . Redstone's prime contractor was the Chrysler Corporation. The Redstone spawned the Redstone rocket family which holds a number of firsts in the US space program, notably launching the first US astronaut. It was retired by the Army in 1964 and replaced by the solid-fueled MGM-31 Per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unsymmetrical Dimethylhydrazine
Unsymmetrical dimethylhydrazine (UDMH; 1,1-dimethylhydrazine, НДМГ or codenamed Geptil) is a chemical compound with the formula H2NN(CH3)2 that is used as a rocket propellant. It is a colorless liquid, with a sharp, fishy, ammonia-like smell typical for organic amines. Samples turn yellowish on exposure to air and absorb oxygen and carbon dioxide. It is miscible with water, ethanol, and kerosene. In concentration between 2.5% and 95% in air, its vapors are flammable. It is not sensitive to shock. Symmetrical dimethylhydrazine, 1,2-dimethylhydrazine is also known but is not as useful. Production UDMH is produced industrially by two routes. Based on the Olin Raschig process, one method involves reaction of monochloramine with dimethylamine giving 1,1-dimethylhydrazinium chloride: :(CH3)2NH + NH2Cl → (CH3)2NNH2 ⋅ HCl In the presence of suitable catalysts, acetylhydrazine can be N-dimethylated using formaldehyde and hydrogen to give the N,N-dimethyl-N'-acetylhydrazine, w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jupiter-C
The Jupiter-C was an American research and development vehicle developed from the Jupiter-A. Jupiter-C was used for three unmanned sub-orbital spaceflights in 1956 and 1957 to test re-entry nosecones that were later to be deployed on the more advanced PGM-19 Jupiter mobile missile. The recovered nosecone was displayed in the Oval Office as part of President Dwight D. Eisenhower's televised speech on November 7, 1957. A member of the Redstone rocket family, Jupiter-C was designed by the U.S. Army Ballistic Missile Agency (ABMA), under the direction of Wernher von Braun. Three Jupiter-C flights were made followed by three satellite launches (Juno I). All were launched from Cape Canaveral, Florida. Description Each vehicle consisted of a modified Redstone ballistic missile with two solid-propellant upper stages. The tanks of the Redstone were lengthened by 8 ft (2.4 m) to provide additional propellant. The instrument compartment was also smaller and lighter than the Reds ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Air & Space
''Air & Space/Smithsonian'' is a quarterly magazine published by the National Air and Space Museum in Washington, D.C. ) , image_skyline = , image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, White House, Adams Morgan, ..., United States. Its first publication was in April 1986. Articles in the magazine involve topics related to aviation and space travel, historical and current. It also covers military aviation and aeronautical technology. References External links * 1986 establishments in Washington, D.C. Bimonthly magazines published in the United States History magazines published in the United States Aviation magazines Magazines established in 1986 Magazines published in Washington, D.C. Smithsonian Institution publications {{hist-mag-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bagel And Cream Cheese
A bagel and cream cheese (also known as bagel ''with'' cream cheese) is a common food pairing in American cuisine, the cuisine of New York City, and American Jewish cuisine, consisting in its basic form of a sliced bagel spread with cream cheese. The bagel with cream cheese is traditionally and most commonly served open-faced, sliced horizontally and spread with cream cheese and other toppings. Beginning in the 1980s as bagels greatly expanded in popularity beyond Jewish communities, the bagel served closed as a sandwich became increasingly popular for its portability. The basic bagel with cream cheese serves as the base for other items such as the "lox and schmear", a staple of delicatessens in the New York City area and across the U.S. While non-Jewish ingredients take well to bagel sandwiches, such as eggs and breakfast meats, cold cuts and sliced cheese, several traditional Jewish toppings for bagels do not work well between bagel halves, including the popular whitefish salad, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bagel
A bagel ( yi, בײגל, translit=beygl; pl, bajgiel; also spelled beigel) is a bread roll originating in the Jewish communities of Poland. It is traditionally shaped by hand into a roughly hand-sized ring from yeasted wheat dough that is first boiled for a short time in water and then baked. The result is a dense, chewy, doughy interior with a browned and sometimes crisp exterior. Bagels are often topped with seeds baked on the outer crust—traditional choices include poppy and sesame seeds—or with salt grains. Different dough types include whole-grain and rye. The basic roll-with-a-hole design, hundreds of years old, allows even cooking and baking of the dough; it also allows groups of bagels to be gathered on a string or dowel for handling, transportation, and retail display. The earliest known mention of a boiled-then-baked ring-shaped bread can be found in a 13th-century Syrian cookbook, where they are referred to as . Bagels have been widely associated with Ashkenazi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Downey, California
Downey is a city located in Southeast Los Angeles County, California, United States, southeast of downtown Los Angeles. It is considered part of the Gateway Cities. The city is the birthplace of the Apollo space program. It is also the home of the oldest operating McDonald's restaurant in the world. As of the 2020 census, the city had a total population of 114,355. History 18th century to World War II Mission San Gabriel Arcángel was initially founded on September 8, 1771, near settlements of the Tongva people. It was located in the Whittier Narrows on a bluff overlooking the Rio Hondo, near the intersection of today's San Gabriel Blvd and Lincoln Avenue.Kyle, Douglas E. (1990). ''Historic Spots in California'', 4th ed. Stanford, CA: Stanford University Press. After five years, flooding forced the relocation of the mission to its present site in San Gabriel. In 1784, Governor Pedro Fages granted to former soldier Manuel Nieto (1734–1804) the largest of the land conce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North American Aviation
North American Aviation (NAA) was a major American aerospace manufacturer that designed and built several notable aircraft and spacecraft. Its products included: the T-6 Texan trainer, the P-51 Mustang fighter, the B-25 Mitchell bomber, the F-86 Sabre jet fighter, the X-15 rocket plane, the XB-70, the B-1 Lancer, the Apollo command and service module, the second stage of the Saturn V rocket, and the Space Shuttle orbiter. Through a series of mergers and sales, North American Aviation became part of North American Rockwell, which later became Rockwell International, and is now part of Boeing. History Early years On December 6, 1928, Clement Melville Keys founded North American as a holding company that bought and sold interests in various airlines and aviation-related companies. However, the Air Mail Act of 1934 forced the breakup of such holding companies. North American became a manufacturing company, run by James H. Kindelberger, James H. "Dutch" Kindelberger, who had bee ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Liquid Oxygen
Liquid oxygen—abbreviated LOx, LOX or Lox in the aerospace, submarine and gas industries—is the liquid form of molecular oxygen. It was used as the oxidizer in the first liquid-fueled rocket invented in 1926 by Robert H. Goddard, an application which has continued to the present. Physical properties Liquid oxygen has a pale blue color and is strongly paramagnetic: it can be suspended between the poles of a powerful horseshoe magnet. Liquid oxygen has a density of , slightly denser than liquid water, and is cryogenic with a freezing point of and a boiling point of at . Liquid oxygen has an expansion ratio of 1:861 under and , and because of this, it is used in some commercial and military aircraft as a transportable source of breathing oxygen. Because of its cryogenic nature, liquid oxygen can cause the materials it touches to become extremely brittle. Liquid oxygen is also a very powerful oxidizing agent: organic materials will burn rapidly and energetically in liquid o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Explorer I
Explorer 1 was the first satellite launched by the United States in 1958 and was part of the U.S. participation in the International Geophysical Year (IGY). The mission followed the first two satellites the previous year; the Soviet Union's Sputnik 1 and Sputnik 2, beginning the Cold War Space Race between the two nations. Explorer 1 was launched on 1 February 1958 at 03:47:56 GMT (or 31 January 1958 at 22:47:56 Eastern Time) atop the first Juno booster from LC-26A at the Cape Canaveral Missile Test Center of the Atlantic Missile Range (AMR), in Florida. It was the first spacecraft to detect the Van Allen radiation belt, returning data until its batteries were exhausted after nearly four months. It remained in orbit until 1970. Explorer 1 was given Satellite Catalog Number 00004 and the Harvard designation 1958 Alpha 1, the forerunner to the modern International Designator. Background The U.S. Earth satellite program began in 1954 as a joint U.S. Army and U.S. Navy pro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Specific Impulse
Specific impulse (usually abbreviated ) is a measure of how efficiently a reaction mass engine (a rocket using propellant or a jet engine using fuel) creates thrust. For engines whose reaction mass is only the fuel they carry, specific impulse is exactly proportional to the effective exhaust gas velocity. A propulsion system with a higher specific impulse uses the mass of the propellant more efficiently. In the case of a rocket, this means less propellant needed for a given delta-v, so that the vehicle attached to the engine can more efficiently gain altitude and velocity. In an atmospheric context, specific impulse can include the contribution to impulse provided by the mass of external air that is accelerated by the engine in some way, such as by an internal turbofan or heating by fuel combustion participation then thrust expansion or by external propeller. Jet engines breathe external air for both combustion and by-pass, and therefore have a much higher specific impulse than ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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