|
Mischgerät (V-2 Guidance Computer)
Designed in 1941 by Helmut Hölzer, the Mischgerät (mixer device) was the first fully electronic computing device, used to implement Hölzer’s V-2 rocket stability control equation during powered flight. It differentiated the voltages from the ''Vertikant'' (yaw and roll) and ''Horizont'' (pitch) gyroscopes to sense the gyro platform's divergence from its original orientation in pitch, yaw and roll, - and more crucially derived the rate of divergence - and output amplified correcting voltages to the steering servos for the exhaust vanes and external rudders. Technical concepts tested with the smaller Aggregat#A5 (1938–1942), A5 research rocket included use of the Siemens Vertikant stability control system with rate gyros. This approach didn't scale well for the larger and higher performance V-2. From his previous glider ground speed indicator concept in the mid-1930s, Hölzer realized he could implement an electrical approximation of a stability control equation by processi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Helmut Hölzer
Helmut Hoelzer was a Nazi Germany V-2 rocket engineer who was brought to the United States under Operation Paperclip. Hoelzer was the inventor and constructor of the world's first electronic analog computer. Life In October 1939, while working for the Telefunken electronics firm in Berlin, Hoelzer met with Ernst Steinhoff, Hermann Steuding, and Wernher von Braun regarding guide beams for a flying body.p. 107 In late 1940 at Peenemünde, Hoelzer was head of the guide beam divisionp. 140 (assistant Henry Otto Hirschler), which developed a guide-plane system which alternates a transmitted signal from two antennas a short distance apart, as well as a vacuum tube mixing device () which corrected for momentum that would perturb an object that had been moved back on-track.p. 104 By the fall of 1941, Hoelzer's "mixing device" was used to provide V-2 rocket rate measurement instead of rate gyros.p. 106 Then at the beginning of 1942, Hoelzer built an analog computer to calculate and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
A4 Fin & Axis Labels
A4 commonly refers to: * A4 paper, a paper size defined by the ISO 216 standard, measuring 210 × 297 mm A4 and variants may also refer to: Science and technology * British NVC community A4 (''Hydrocharis morsus-ranae - Stratiotes aloides'' community), one type of Aquatic communities in the British National Vegetation Classification system * Combretastatin A-4, a stilbenoid chemical compound * ''A''4, the alternating group on four elements * A4, a type of stainless steel * Subfamily A4, a rhodopsin-like receptors subfamily * Zeolite A-4, a sodium-type molecular sieve also known as 4A Computing * Apple A4, a microprocessor used in some Apple products * AMD A4, a microprocessor * Samsung Galaxy A04, a smartphone manufactured by Samsung Electronics Medicine * ATC code A04 ''Antiemetics and antinauseants'', a subgroup of the Anatomical Therapeutic Chemical Classification System * Lipoxin A4, a lipoxin * Androstenedione, an androgen steroid hormone Transportation Aero ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mittelbau-Dora Concentration Camp
Mittelbau-Dora (also Dora-Mittelbau and Nordhausen-Dora) was a Nazi concentration camp located near Nordhausen in Thuringia, Germany. It was established in late summer 1943 as a subcamp of Buchenwald concentration camp, supplying slave labour from many Eastern countries occupied by Germany (including evacuated survivors of eastern extermination camps), for extending the nearby tunnels in the Kohnstein and for manufacturing the V-2 rocket and the V-1 flying bomb. In the summer of 1944, ''Mittelbau'' became an independent concentration camp with numerous subcamps of its own. In 1945, most of the surviving inmates were sent on death marches or crammed in trains of box-cars by the SS. On 11 April 1945, US troops freed the remaining prisoners. The inmates at Dora-Mittelbau were treated in a brutal and inhumane manner, working 14-hour days and being denied access to basic hygiene, beds, and adequate rations. Around one in three of the roughly 60,000 prisoners who were sent to Dora- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
V-2 Pitch, Roll, Yaw Gyros
IC power-supply pins are voltage and current supply terminals found on integrated circuits (ICs) in electrical engineering, electronic engineering, and integrated circuit design. ICs have at least two pins that connect to the power rails of the circuit in which they are installed. These are known as the power-supply pins. However, the labeling of the pins varies by IC family and manufacturer. The double-subscript notation usually corresponds to a first letter in a given IC family (transistors) notation of the terminals (e.g. VDD supply for a drain terminal in FETs etc.). The simplest labels are V+ and V−, but internal design and historical traditions have led to a variety of other labels being used. V+ and V− may also refer to the non-inverting (+) and inverting (−) voltage inputs of ICs like op amps. For power supplies, sometimes one of the supply rails is referred to as ground (abbreviated "GND") positive and negative voltages are relative to the ground. In digital ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Das Mischgerät
Das or DAS may refer to: Organizations * Dame Allan's Schools, Fenham, Newcastle upon Tyne, England. * Danish Aviation Systems, a supplier and developer of unmanned aerial vehicles. * Departamento Administrativo de Seguridad, a former Colombian intelligence agency. * Department of Applied Science, UC Davis. * ''Debt Arrangement Scheme'', Scotland, see Accountant in Bankruptcy. Places * Das (crater), a lunar impact crater on the far side of the Moon * Das (island), an Emirati island in the Persian Gulf ** Das Island Airport * Das, Catalonia, a village in the Cerdanya, Spain * Das, Iran, a village in Razavi Khorasan Province * Great Bear Lake Airport, Northwest Territories, Canada (IATA code) Science * 1,2-Bis(dimethylarsino)benzene, a chemical compound. * DAS28, Disease Activity Score of 28 joints, rheumatoid arthritis measure. * Differential Ability Scales, cognitive and achievement tests. Technology * Data acquisition system * Defensive aids system, an aircraft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Missile Oscillation, Case B
A missile is an airborne ranged weapon capable of self-propelled flight aided usually by a propellant, jet engine or rocket motor. Historically, 'missile' referred to any projectile that is thrown, shot or propelled towards a target; this usage is still recognized today with any unguided jet- or rocket-propelled weapons generally described as rocket artillery. Airborne explosive devices without propulsion are referred to as shells if fired by an artillery piece and bombs if dropped by an aircraft. Missiles are also generally guided towards specific targets termed as guided missiles or guided rockets. Missile systems usually have five system components: targeting, guidance system, flight system, engine, and warhead. Missiles are primarily classified into different types based on firing source and target such as surface-to-surface, air-to-surface, surface-to-air and air-to-air missiles. Terminology Missile is derived from Latin "missilis" meaning "that may be thrown". ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
