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Pulsejet Engine
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. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
Paul Schmidt (inventor)
Paul Schmidt (26 March 1898 18 October 1976) was a German aerospace engineer and inventor based in Munich, mainly known for his contribution to the development of the pulsejet. Life Schmidt was born on 26 March 1898 in Hagen, Westphalia. His early work involved efforts to improve the performance and efficiency of aircraft power plants. In 1928 he decided the most promising technology was intermittent thrust generation. With meagre resources, he worked on developing pulse engines. German ministry officials visited him in the early 1930s to make an assessment of his work. He initially started pushing the concept of the pulse engine in 1931. Patent DE523655 contained the first sketch of an impulsive duct. In the mid 1930s, the Luftwaffe was interested in applying Schmidt's work . His development of the Pulse Engine was referred to as the Schmidtrohr (Schmidttube) and he obtained both German and British patents for it. He used the term "pulsating incineration" in reference to the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ignition Coil
An ignition coil is used in the ignition system of a spark-ignition engine to transform the battery voltage to the much higher voltages required to operate the spark plug(s). The spark plugs then use this burst of high-voltage electricity to ignite the air-fuel mixture. The ignition coil is constructed of two sets of coils wound around an iron core. Older engines often use a single ignition coil which has its output directed to each cylinder by a distributor, a design which is still used by various small engines (such as lawnmower engines). Modern car engines often use a distributor-less system (such as ''coil-on-plug''), whereby every cylinder has its own ignition coil. Diesel engines use compression ignition and therefore do not have ignition coils. Design An ignition coil consists of an iron core surrounded by two coils (''windings'') made from copper wire. The primary winding has relatively few turns of heavy wire, while the secondary winding consists of thousands o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cycles Per Second
The cycle per second is a once-common English name for the unit of frequency now known as the ''hertz'' (Hz). Cycles per second may be denoted by c.p.s., c/s, or, ambiguously, just "cycles" (Cyc., Cy., C, or c). The term comes from repetitive phenomena such as sound waves having a frequency measurable as a number of oscillations, or cycles, per second. With the organization of the International System of Units in 1960, the cycle per second was officially replaced by the hertz, or reciprocal second, "s−1" or "1/s". Symbolically, "cycle per second" units are "cycle/second", while hertz is "Hz" or "s−1". For higher frequencies, ''kilocycles'' (kc), as an abbreviation of ''kilocycles per second'' were often used on components or devices. Other higher units like ''megacycle'' (Mc) and less commonly ''kilomegacycle'' (kMc) were used before 1960 and in some later documents. These have modern equivalents such as kilohertz (kHz), megahertz (MHz), and gigahertz (GHz). Following the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peenemünde
Peenemünde (, ) is a municipality on the Baltic Sea island of Usedom in the Vorpommern-Greifswald district in Mecklenburg-Vorpommern in north-eastern Germany. It is part of the ''Amt (country subdivision), Amt'' (collective municipality) of Usedom-Nord. The community is known for the Peenemünde Army Research Center, where the world's first functional large-scale liquid-propellant rocket, the V-2 rocket, V-2, was developed. Geography The village with its seaport is located on the westernmost extremity of a long sand-spit, where the Peene empties into the Baltic Sea, in the northwestern part of Usedom Island. To the southeast it borders on the sea resort of Karlshagen. Peenemünde harbour can be reached by ferry boat across the Peene from Kröslin, liners also run along the Baltic coast to Rügen Island. The local railway station is the northern terminus of the ''Usedomer Bäderbahn'' line to Zinnowitz. Air service for the village is available at the Peenemünde Airfield. Hist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Siemens
Siemens AG ( ) is a German multinational technology conglomerate. It is focused on industrial automation, building automation, rail transport and health technology. Siemens is the largest engineering company in Europe, and holds the position of global market leader in industrial automation and industrial software. The origins of the conglomerate can be traced back to 1847 to the ''Telegraphen Bau-Anstalt von Siemens & Halske'' established in Berlin by Werner von Siemens and Johann Georg Halske. In 1966, the present-day corporation emerged from the merger of three companies: Siemens & Halske, Siemens-Schuckert, and Siemens-Reiniger-Werke. Today headquartered in Munich and Berlin, Siemens and its subsidiaries employ approximately 320,000 people worldwide and reported a global revenue of around €78 billion in 2023. The company is a component of the DAX and Euro Stoxx 50 stock market indices. As of December 2023, Siemens is the second largest German company by market ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fritz Gosslau
Fritz Gosslau (25 March 1898 – 1 December 1965) was a German engineer, known for his work on the V-1 flying bomb. Study Gosslau was born in Berlin. In 1923, he completed his engineering studies by gaining a diploma from the ''Königliche Technische Hochschule'' in Berlin-Charlottenburg (now Technische Universität Berlin). In 1926, he obtained his PhD on the topic ''Rechnerische und experimentelle Untersuchungen über Wärmebeherrschung und Leistungssteigerung in luftgekühlten Flugmotorenzylindern'' – calculated and experimental studies on heat control and performance improvement in air-cooled aircraft engine cylinders. Work During the 1930s, Gosslau worked on the development of aircraft engines at Siemens. When the company abandoned production of aircraft engines, he moved to '' Argus Motoren Gesellschaft''. Gosslau was part of the construction team of the Argus As 410 and 411 engines. He was also involved in the construction of a 24-cylinder air-cooled engine that dev ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
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] |
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] |
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] |
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] |
