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Luftfahrtforschungsanstalt
The ''Deutsche Luftfahrtforschungsanstalt'' (LFA/German Aeronautical Research Institute, also known as the '' Hermann Göring Research Institute'') was a secret German facility for airframe, aeroengine, and aircraft weapons testing during the Second World War. It was located near Völkenrode, on the western outskirts of Braunschweig (Brunswick), near what became the Inner German Border. The site was Germany's "most advanced and extensive viationresearch establishment, outside of the existing ''Erprobungsstelle'' network of military aviation evaluation facilities, themselves headquartered at Rechlin. History and activities Site layout It was a site begun in October 1935. The first wind tunnel was begun in November 1936. Most of the sixty buildings, scattered around the site, did not exceed treetop height, and all were well-camouflaged, to reduce the chance of them being detected by aerial reconnaissance and to avoid making them targets, as the wind tunnels of the '' D ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
German Aerospace Centre
The German Aerospace Center (, abbreviated DLR, literally ''German Center for Air- and Space-flight'') is the national center for aerospace, energy and transportation research of Germany, founded in 1969. It is headquartered in Cologne with 35 locations throughout Germany. The DLR is engaged in a wide range of research and development projects in national and international partnerships. The DLR acts as the German space agency and is responsible for planning and implementing the German space programme on behalf of the Cabinet of Germany, German federal government. As a project management agency, DLR coordinates and answers the technical and organisational implementation of projects funded by a number of German federal ministries. As of 2020, the German Aerospace Center had a national budget of €1.348 billion. Overview DLR has approximately 10.000 employees at 30 locations in Germany. Institutes and facilities are spread over 13 sites, as well as offices in Brussels, Pari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Völkenrode
Völkenrode is a quarter (''Stadtteil'') of Braunschweig, Lower Saxony, Germany. Formerly a municipality in its own right and part of the district of Braunschweig, it was incorporated into the city of Braunschweig in 1974. Today, it is part of the ''Stadtbezirk'' Lehndorf-Watenbüttel. During the Second World War, it was home to the ''Luftfahrtforschungsanstalt'' (Aeronautical Research Institute, ''LFA''), a secret facility for airframe, aeroengine, and aircraft weapons testing. Völkenrode, and the ''LFA'', were visited postwar by the British Ministry of Aircraft Production survey team, headed by Sir Roy Fedden.Christopher, pp.9-10. Today, the Physikalisch-Technische Bundesanstalt The Physikalisch-Technische Bundesanstalt (PTB) is the national metrology institute of the Federal Republic of Germany, with scientific and technical service tasks. It is a higher federal authority and a public-law institution directly under fed ... and the former Federal Agricultural Research ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Braunschweig
Braunschweig () or Brunswick ( ; from Low German , local dialect: ) is a List of cities and towns in Germany, city in Lower Saxony, Germany, north of the Harz Mountains at the farthest navigable point of the river Oker, which connects it to the North Sea via the rivers Aller (Germany), Aller and Weser. In 2024, it had a population of 272,417. The Braunschweig-Wolfsburg-Salzgitter region had 1.02 million residents including the cities Wolfsburg and Salzgitter, it is the second largest urban center in Lower Saxony after Hanover. The urban agglomeration of Braunschweig had a population of 551,000 with almost 45% having a migration background, making it the most diverse urban agglomeration in the whole Niedersachsen, state. The city consists of 37.5% immigrants (approximately 102,000) with a high amount of migrants coming from other European countries, Asia and Africa. 73% of the Germans residing in Braunschweig come from different parts of the country, particularly North Rhine West ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deutsche Versuchsanstalt Für Luftfahrt
The German Aerospace Center (, abbreviated DLR, literally ''German Center for Air- and Space-flight'') is the national center for aerospace, energy and transportation research of Germany, founded in 1969. It is headquartered in Cologne with 35 locations throughout Germany. The DLR is engaged in a wide range of research and development projects in national and international partnerships. The DLR acts as the German space agency and is responsible for planning and implementing the German space programme on behalf of the German federal government. As a project management agency, DLR coordinates and answers the technical and organisational implementation of projects funded by a number of German federal ministries. As of 2020, the German Aerospace Center had a national budget of €1.348 billion. Overview DLR has approximately 10.000 employees at 30 locations in Germany. Institutes and facilities are spread over 13 sites, as well as offices in Brussels, Paris and Washington, D. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hermann Göring
Hermann Wilhelm Göring (or Goering; ; 12 January 1893 – 15 October 1946) was a German Nazism, Nazi politician, aviator, military leader, and convicted war criminal. He was one of the most powerful figures in the Nazi Party, which governed Germany from 1933 to 1945. He also served as ''Oberkommando der Luftwaffe, Oberbefehlshaber der Luftwaffe'' (Supreme Commander of the Air Force), a position he held until the final days of the regime. He was born in Rosenheim, Kingdom of Bavaria, Bavaria. A veteran World War I fighter pilot Flying aces, ace, Göring was a recipient of the . He served as the last commander of Jagdgeschwader 1 (World War I), ''Jagdgeschwader'' 1 (JG I), the fighter wing once led by Manfred von Richthofen. An early member of the Nazi Party, Göring was among those wounded in Adolf Hitler's failed Beer Hall Putsch in 1923. While receiving treatment for his injuries, he developed an addiction to morphine that persisted until the last year of his life. Aft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scale (ratio)
The scale ratio of a model represents the proportional ratio of a linear dimension of the model to the same feature of the original. Examples include a 3-dimensional scale model of a building or the scale drawings of the elevations or plans of a building. In such cases the scale is dimensionless and exact throughout the model or drawing. The scale can be expressed in four ways: in words (a lexical scale), as a ratio, as a fraction and as a graphical (bar) scale. Thus on an architect's drawing one might read 'one centimeter to one meter', 1:100, 1/100, or . A bar scale would also normally appear on the drawing. Colon may also be substituted with a specific, slightly raised ratio symbol , ie. . General representation Generally, a representation may involve more than one scale at the same time. For example, a drawing showing a new road in elevation might use different horizontal and vertical scales. An elevation of a bridge might be annotated with arrows with a length proportion ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Steam
Steam is water vapor, often mixed with air or an aerosol of liquid water droplets. This may occur due to evaporation or due to boiling, where heat is applied until water reaches the enthalpy of vaporization. Saturated or superheated steam is invisible; however, wet steam, a visible mist or aerosol of water droplets, is often referred to as "steam". When liquid water becomes steam, it increases in volume by 1,700 times at standard temperature and pressure; this change in volume can be converted into work (physics), mechanical work by steam engines such as reciprocating engine, reciprocating piston type engines and steam turbines, which are a sub-group of steam engines. Piston type steam engines played a central role in the Industrial Revolution and modern steam turbines are used to generate more than 80% of the world's electricity. If liquid water comes in contact with a very hot surface or depressurizes quickly below its vapor pressure, vapour pressure, it can create a steam exp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Heating
In thermodynamics, heat is energy in transfer between a thermodynamic system and its surroundings by such mechanisms as thermal conduction, electromagnetic radiation, and friction, which are microscopic in nature, involving sub-atomic, atomic, or molecular particles, or small surface irregularities, as distinct from the macroscopic modes of energy transfer, which are thermodynamic work and transfer of matter. For a closed system (transfer of matter excluded), the heat involved in a process is the difference in internal energy between the final and initial states of a system, after subtracting the work done in the process. For a closed system, this is the formulation of the first law of thermodynamics. Calorimetry is measurement of quantity of energy transferred as heat by its effect on the states of interacting bodies, for example, by the amount of ice melted or by change in temperature of a body. In the International System of Units (SI), the unit of measurement for heat, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Direct Current
Direct current (DC) is one-directional electric current, flow of electric charge. An electrochemical cell is a prime example of DC power. Direct current may flow through a conductor (material), conductor such as a wire, but can also flow through semiconductors, electrical insulation, insulators, or even through a vacuum as in electron beam, electron or ion beams. The electric current flows in a constant direction, distinguishing it from alternating current (AC). A archaism, term formerly used for this type of current was galvanic current. The abbreviations ''AC'' and ''DC'' are often used to mean simply ''alternating'' and ''direct'', as when they modify ''Electric current, current'' or ''voltage''. Direct current may be converted from an alternating current supply by use of a rectifier, which contains Electronics, electronic elements (usually) or electromechanical elements (historically) that allow current to flow only in one direction. Direct current may be converted into alt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mach Number
The Mach number (M or Ma), often only Mach, (; ) is a dimensionless quantity in fluid dynamics representing the ratio of flow velocity past a boundary to the local speed of sound. It is named after the Austrian physicist and philosopher Ernst Mach. \mathrm = \frac, where: * is the local Mach number, * is the local flow velocity with respect to the boundaries (either internal, such as an object immersed in the flow, or external, like a channel), and * is the speed of sound in the medium, which in air varies with the square root of the thermodynamic temperature. By definition, at Mach1, the local flow velocity is equal to the speed of sound. At Mach0.65, is 65% of the speed of sound (subsonic), and, at Mach1.35, is 35% faster than the speed of sound (supersonic). The local speed of sound, and hence the Mach number, depends on the temperature of the surrounding gas. The Mach number is primarily used to determine the approximation with which a flow can be treated as an i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telephone Exchange
A telephone exchange, telephone switch, or central office is a central component of a telecommunications system in the public switched telephone network (PSTN) or in large enterprises. It facilitates the establishment of communication circuits, enabling telephone calls between subscribers. The term "central office" can also refer to a central location for fiber optic equipment for a fiber internet provider. In historical perspective, telecommunication terminology has evolved with time. The term ''telephone exchange'' is often used synonymously with ''central office'', a Bell System term. A central office is defined as the telephone switch controlling connections for one or more central office prefixes. However, it also often denotes the building used to house the inside plant equipment for multiple telephone exchange areas. In North America, the term ''wire center'' may be used to denote a central office location, indicating a facility that provides a telephone with a dial tone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
