Pulsejet
file:Pulse Jet Engine.PNG, 300px, Diagram of a valved pulsejet. 1 - Air enters through valve and is mixed with fuel. 2 - The mixture is ignited, expands, closes the valve and exits through the tailpipe, creating thrust.3 - Low pressure in the engine opens the valve and draws in air. A pulsejet engine (or pulse jet) is a type of jet engine in which combustion occurs in Pulse (physics), pulses. A pulsejet engine can be made with few or no moving parts, and is capable of running statically (that is, it does not need to have air forced into its inlet, typically by forward motion). The best known example is the Argus As 109-014 used to propel Nazi Germany's V-1 flying bomb. Pulsejet engines are a lightweight form of jet propulsion, but usually have a poor compression ratio, and hence give a low specific impulse. The two main types of pulsejet engines use resonant combustion and harness the combustion products to form a pulsating exhaust jet that intermittently produces thrust. T ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Argus As 014
The Argus As 014 (designated 109-014 by the Ministry of Aviation (Germany), RLM) was a pulsejet engine used on the German V-1 flying bomb of World War II, and the first model of pulsejet engine placed in mass production. License manufacture of the As 014 was carried out in Japan in the latter stages of World War II, as the Kawanishi Maru Ka10 for the Kawanishi Baika kamikaze jet. The United States reverse-engineered the design for the Ford PJ31 powering the Republic-Ford JB-2 cruise missile and the experimental USAAF-developed JB-4 television-guided bomb. Development The origins of the Argus As 014 lie in 1928, when Munich inventor Paul Schmidt (inventor), Paul Schmidt began work on a new design of pulse jet engine. Schmidt received a patent on his design in 1931 and received support from the German Air Ministry in 1933. In 1934, along with Professor Georg Hans Madelung, Georg Madelung, Schmidt proposed a "flying bomb" to be powered by his pulse jet to the Ministry and received ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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V-1 Flying Bomb
The V-1 flying bomb ( "Vengeance Weapon 1") was an early cruise missile. Its official Reich Aviation Ministry () name was Fieseler Fi 103 and its suggestive name was (hellhound). It was also known to the Allies as the buzz bomb or doodlebug and (maybug). The V-1 was the first of the (V-weapons) deployed for the terror bombing of London. It was developed at Peenemünde Army Research Center in 1939 by the at the beginning of the Second World War, and during initial development was known by the codename "Cherry Stone". Due to its limited range, the thousands of V-1 missiles launched into England were fired from V-1 flying bomb facilities, launch sites along the French (Pas-de-Calais) and Dutch coasts or by modified Heinkel He 111 aircraft. The Wehrmacht first launched the V-1s against London on 13 June 1944, one week after (and prompted by) Operation Overlord, the Allied landings in France. At times more than one hundred V-1s a day were fired at south-east England, 9,521 in t ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Pulse Detonation Engine
A pulse detonation engine (PDE) is a type of propulsion system that uses detonation waves to combust the fuel and oxidizer mixture. The engine is pulsed because the mixture must be renewed in the combustion chamber between each detonation wave and the next. Theoretically, a PDE can operate from subsonic up to a hypersonic flight speed of roughly Mach 5. An ideal PDE design can have a thermodynamic efficiency higher than other designs like turbojets and turbofans because a detonation wave rapidly compresses the mixture and adds heat at constant volume. Consequently, moving parts like compressor spools are not necessarily required in the engine, which could significantly reduce overall weight and cost. Key issues for further development include fast and efficient mixing of the fuel and oxidizer, the prevention of autoignition, and integration with an inlet and nozzle. , no practical PDE has been put into production, but several testbed engines have been built and one was ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Jet Engine
A jet engine is a type of reaction engine, discharging a fast-moving jet (fluid), jet of heated gas (usually air) that generates thrust by jet propulsion. While this broad definition may include Rocket engine, rocket, Pump-jet, water jet, and hybrid propulsion, the term typically refers to an internal combustion airbreathing jet engine, air-breathing jet engine such as a turbojet, turbofan, ramjet, pulse jet engine, pulse jet, or scramjet. In general, jet engines are internal combustion engines. Air-breathing jet engines typically feature a Axial compressor, rotating air compressor powered by a turbine, with the leftover power providing thrust through the propelling nozzle—this process is known as the Brayton cycle, Brayton thermodynamic cycle. Jet aircraft use such engines for long-distance travel. Early jet aircraft used turbojet engines that were relatively inefficient for subsonic flight. Most modern subsonic jet aircraft use more complex High-bypass turbofan, high-bypas ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Aviolanda AT-21
The Aviolanda AT-21 was a target drone developed in the Netherlands by Aviolanda. Powered by a pulsejet engine, it was the Netherlands' first drone to be successfully developed, and saw limited use in the late 1950s and early 1960s. Design and development Developed in 1955, the AT-21 was of conventional aircraft design, with a high-mounted, constant- chord monoplane wing and a twin tail empennage. Power was provided by a SNECMA AS-11 Ecrevisse pulsejet, mounted in a fairing underneath the aircraft's fuselage; the construction of the airframe made extensive use of plastic in the nose and tail, with the center-section being of metal construction, and the wings and tail were made of foam-filled plastic with metal stabilizers and rudders. Launch was by JATO-type booster rockets from a zero-length launch ramp; a trolley for conventional takeoff from a runway was also available. Control was by radio commands from a remote guidance station, set up like an aircraft cockpit; if r ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Robert Lusser
Robert Lusser (19 April 1899 – 19 January 1969) was a German engineer, aircraft designer and aviator. He is remembered both for several well-known Messerschmitt and Heinkel designs during World War II, and after the war for his theoretical study of the reliability of complex systems. In the post-war era, Lusser also pioneered the development of modern ski bindings, introducing the first teflon anti-friction pads to improve release. Biography Lusser was born in Ulm. As a pilot, he won the International Light Aircraft Contest in France in 1928. Next he participated in three out of four FAI International Tourist Plane Contests, flying Klemm aircraft, and completed all three taking quite high places ( Challenge 1929: 4th, Challenge 1930: 13th, and Challenge 1932: 10th). In August 1930 he was 3rd in the handicapped race ''Giro Aereo d'Italia'' in Italy. Lusser's first jobs were with the Klemm and Heinkel companies, before joining the newly relaunched ''Bayerische Flugzeugwerke ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Georg Hans Madelung
Georg Hans Madelung (31 July 1889 in Rostock – 17 August 1972 in Uffing) was a German academic and aeronautical engineer. Madelung studied at several German universities of technology before his service as a pilot in the First World War. After the war he lectured and worked in Germany and the United States, working on a number of significant aeronautical achievements. Madelung joined the Nazi Party in 1937, and during the Second World War was involved with aeronautical warfare research, including work with Wernher von Braun's rocket program. After the cessation of hostilities, Madelung resumed academic work in both Germany and the USA. Madelung's research at the Naval Medical Research Institute, Bethesda, Maryland included the effects of high acceleration on the human body. He permanently returned to live in Germany from 1954 until his death in 1972. The second son of his marriage to Elisabeth Emma née Messerschmitt was Wilferd Madelung, a noted scholar in Islamic stud ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Reich Air Ministry
The Ministry of Aviation (, abbreviated RLM) was a government department during the period of Nazi Germany (1933–45). It is also the original name of the Detlev-Rohwedder-Haus building on the Wilhelmstrasse in central Berlin, Germany, which houses the modern German Finance Ministry (). The Ministry was in charge of development and production of all aircraft developed, designed, and built in Germany during the existence of the Third Reich, overseeing all matters concerning both military and civilian designs – it handled military aviation matters as its top priority, particularly for the Luftwaffe. As was characteristic of government departments in the Nazi era, the Ministry was personality-driven and formal procedures were often ignored in favour of the whims of the Minister, ''Reichsmarschall'' Hermann Göring. As a result, early successes in aircraft development progressed only slowly and erratically during World War II. History The Ministry was formed on 27 April 1933 f ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Argus Motoren
''Argus Motoren'' was a German manufacturing firm known for their series of small inverted-V engines and the Argus As 014 pulsejet for the V-1 flying bomb. History Started in Berlin in 1906 as a Argus (automobile), subsidiary of Henri Jeannin's automobile business, ''Argus Motoren'' company spun off entirely in November 1906. Their early products were car and boat engines, but later that year they were contracted to produce engines for the France, French airship, ''La Ville de Paris (airship), Ville de Paris'', supplying them with a converted boat motor. They turned increasingly to the aviation market, and were widely used by 1910, receiving an order from Igor Sikorsky, Sikorsky for one of his large airplanes under construction in Russia. During World War I Argus produced engines for the German Army (German Empire), German army and Luftstreitkräfte, air corps. After World War I the company manufactured automobile engines and acquired a majority interest in Horch, Horch Automobile ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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The Askania Company
''The'' is a grammatical article in English, denoting nouns that are already or about to be mentioned, under discussion, implied or otherwise presumed familiar to listeners, readers, or speakers. It is the definite article in English. ''The'' is the most frequently used word in the English language; studies and analyses of texts have found it to account for seven percent of all printed English-language words. It is derived from gendered articles in Old English which combined in Middle English and now has a single form used with nouns of any gender. The word can be used with both singular and plural nouns, and with a noun that starts with any letter. This is different from many other languages, which have different forms of the definite article for different genders or numbers. Pronunciation In most dialects, "the" is pronounced as (with the voiced dental fricative followed by a schwa) when followed by a consonant sound, and as (homophone of the archaic pronoun ''thee' ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Pulse Jet Engine
In medicine, the pulse refers to the rhythmic pulsations (expansion and contraction) of an artery in response to the cardiac cycle (heartbeat). The pulse may be felt (palpated) in any place that allows an artery to be compressed near the surface of the body close to the skin, such as at the neck (carotid artery), wrist (radial artery or ulnar artery), at the groin (femoral artery), behind the knee (popliteal artery), near the ankle joint (posterior tibial artery), and on foot (dorsalis pedis artery). The pulse is most commonly measured at the wrist or neck for adults and at the brachial artery (inner upper arm between the shoulder and elbow) for infants and very young children. A sphygmograph is an instrument for measuring the pulse. Physiology Claudius Galen was perhaps the first physiologist to describe the pulse. The pulse is an expedient Touch, tactile method of determination of Systole (medicine), systolic blood pressure to a trained observer. Diastolic blood pressure i ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |
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Fieseler
The Gerhard Fieseler Werke (GFW) in Kassel was a German aircraft manufacturer of the 1930s and 1940s. The company is remembered mostly for its military aircraft built for the Luftwaffe during the Second World War. History Gerhard Fieseler, the World War I flying ace and aerobatic champion, purchased the Segel Flugzeugbau Kassel on April 1, 1930; it was renamed the Fieseler Flugzeugbau in 1932.Green, p. 163 Fieseler had been a manager for the Raab-Katzenstein, but when this company went bankrupt, Fieseler bought a sailplane factory in Kassel and quickly turned it to building sports planes. At the same time, Fieseler still custom-built sailplanes for some of Germany's most prominent designers and pilots, including Wolf Hirth's "Musterle" and Robert Kronfeld's "Wien" and "Austria" (for many years the largest sailplane ever built). In 1934, the company achieved prominence when Fieseler won the World Aerobatics Championship in an aircraft his company had built, the F2 Tiger. ... [...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]   |