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Bell Boeing Quad TiltRotor
The Bell Boeing Quad TiltRotor (QTR) is a proposed four-rotor derivative of the Bell Boeing V-22 Osprey developed jointly by Bell Helicopter and Boeing. The concept is a contender in the U.S. Army's Joint Heavy Lift program (a part of Future Vertical Lift program). It would have a cargo capacity roughly equivalent to the C-130 Hercules, cruise at 250 knots, and land at unimproved sites vertically like a helicopter."Diversity in Design: Boeing offers 2 of 5 development options in rotorcraft program" Boeing Frontiers magazine, January 2007. Development Background Bell developed its model D-322 as a |
WikiProject Aircraft
A WikiProject, or Wikiproject, is a Wikimedia movement affinity group for contributors with shared goals. WikiProjects are prevalent within the largest wiki, Wikipedia, and exist to varying degrees within sister projects such as Wiktionary, Wikiquote, Wikidata, and Wikisource. They also exist in different languages, and translation of articles is a form of their collaboration. During the COVID-19 pandemic, CBS News noted the role of Wikipedia's WikiProject Medicine in maintaining the accuracy of articles related to the disease. Another WikiProject that has drawn attention is WikiProject Women Scientists, which was profiled by '' Smithsonian'' for its efforts to improve coverage of women scientists which the profile noted had "helped increase the number of female scientists on Wikipedia from around 1,600 to over 5,000". On Wikipedia Some Wikipedia WikiProjects are substantial enough to engage in cooperative activities with outside organizations relevant to the field at issue. For e ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subsonic And Transonic Wind Tunnel
Low subsonic tunnel Low-speed wind tunnels are used for operations at very low Mach number, with speeds in the test section up to 480 km/h (~ 134 m/s, M = 0.4). They may be of open-return type (also known as the Eiffel type, see figure), or closed-return flow (also known as the Prandtl type, see figure) with air moved by a propulsion system usually consisting of large axial fans that increase the dynamic pressure to overcome the viscous losses. Open wind tunnel The working principle is based on the continuity and Bernoulli's equation: The continuity equation is given by: A V = constant \Rightarrow \frac=-\frac The Bernoulli equation states:- P_=P_ + P_ = P_s + \frac\rho V^2 Putting Bernoulli into the continuity equation gives: V_m^2=2 \frac \frac \approx 2 \frac The contraction ratio of a windtunnel can now be calculated by: C = \frac Closed wind tunnel In a return-flow wind tunnel the return duct must be properly designed to reduce the pressure losses and to en ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Military Aircraft Of The United States
Lists of military aircraft of the United States cover current and former aircraft of the United States Armed Forces. By designation * List of United States Air Force aircraft designations (1919–1962) * List of United States Navy aircraft designations (pre-1962) * List of United States Army aircraft designations (1956–1962) * List of United States Tri-Service aircraft designations * List of U.S. DoD aircraft designations * List of undesignated military aircraft of the United States Other lists * List of active United States military aircraft * List of United States military helicopters * List of aircraft of the United States during World War II *Future military aircraft of the United States * List of U.S. DoD aircraft designations *List of currently active United States naval aircraft *List of active United States Air Force aircraft *List of military aircraft of the United States *UAVs in the U.S. military External links OrBat United States of America – MilAvia Press.c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curtiss-Wright X-19
The Curtiss-Wright X-19, company designation Model 200, was an American experimental tiltrotor aircraft of the early 1960s. It was noteworthy for being the last aircraft of any kind manufactured by Curtiss-Wright. Design and development In March 1960 the Curtiss-Wright Corporation developed the X-100, a prototype for a new, vertical takeoff transport aircraft. The X-100 had a single turboshaft engine, which propelled two tilting-propellers, while at the tail swivelling nozzles used the engine's exhaust gases to give additional control for hovering or slow flight. Although sometimes classified as a tiltrotor aircraft, the design differed from the Bell VTOL XV tiltrotor designs. The X-19 utilized specially designed radial lift propellers, rather than helicopter-like rotors, for vertical takeoff and augmenting the lift provided by the wing structures. From the X-100 Curtiss-Wright developed the larger X-200, of which the United States Air Force ordered two prototypes designated the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell X-22
The Bell X-22 is an American V/STOL X-plane with four tilting ducted fans. Takeoff was to selectively occur either with the propellers tilted vertically upwards, or on a short runway with the nacelles tilted forward at approximately 45°. Additionally, the X-22 was to provide more insight into the tactical application of vertical takeoff troop transporters such as the preceding Hiller X-18 and the X-22's successor, the Bell XV-15. Another program requirement was a true airspeed in level flight of at least 525 km/h (326 mph; 283 knots). Design and development In 1962, the United States Navy announced their request for two prototype aircraft with V/STOL capability, powered by four ducted fan nacelles. Bell Helicopters already had extensive experience with VTOL aircraft and was able to utilize an already developed test mockup. In 1964 the prototype, internally referred to by Bell as Model D2127, was ordered by the Navy and received the X-22 designation. It was unvei ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell V-280 Valor
The Bell V-280 Valor is a tiltrotor aircraft being developed by Bell and Lockheed Martin for the United States Army's Future Vertical Lift (FVL) program.Bell Helicopter and Lockheed Martin team on V-280 Valor , ''AirFramer'', September 9, 2013. Accessed: September 9, 2013. The aircraft was officially unveiled at the 2013 Army Aviation Association of America's (AAAA) Annual Professional Forum and Exposition in Fort Worth, Texas. The V-280 made its first flight on 18 December 2017 in Amarillo, Texas. On 5 December 2022, the V-280 was chosen by the US Army as the winner of the program to r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Powered Lift
A powered lift aircraft takes off and lands vertically under engine power but uses a fixed wing for horizontal flight. Like helicopters, these aircraft do not need a long runway to take off and land, but they have a speed and performance similar to standard fixed-wing aircraft in combat or other situations. Some powered-lift aircraft, like the Bell Boeing V-22 Osprey used by the United States Marines, use a tiltrotor or tiltwing. These are called a convertiplane. Others like the British Harrier jump jet use thrust vectoring or other direct thrust techniques. The first powered-lift ratings on a civilian pilot certificate were issued by the Federal Aviation Administration (FAA) on 21 August 1997 to pilots of Bell Helicopter, Boeing, and the United States Marine Corps. Definition The term is an aircraft classification used by the International Civil Aviation Organization (ICAO) and the United States' FAA: Convertiplane A convertiplane uses rotor power for vertical takeoff an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stryker
The Stryker is a family of eight-wheeled armored fighting vehicles derived from the Canadian LAV III. Stryker vehicles are produced by General Dynamics Land Systems-Canada (GDLS-C) for the United States Army in a plant in London, Ontario. It has four-wheel drive (8×4) and can be switched to all-wheel drive (8×8). The Stryker was conceived as a family of vehicles forming the backbone of a new medium-weight brigade combat team (BCT) that was to strike a balance between heavy armor and infantry. The service launched the Interim Armored Vehicle competition, and in 2000, the service selected the LAV III proposed by GDLS and General Motors Defense. The service named this family of vehicles the "Stryker". Ten variants of the Stryker were initially conceived, some of which have been upgraded with v-hulls. Development history Interim Armored Vehicle competition In October 1999, General Eric Shinseki, then U.S. Army Chief of Staff, outlined a transformation plan for the Army tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
463L Pallet
The HCU-6/E or 463L Master Pallet is a standardized pallet used for transporting military air cargo. It is the main air-cargo pallet of the United States Air Force, designed to be loaded and offloaded on today's military airlifters as well as many civilian Civil Reserve Air Fleet (CRAF) cargo aircraft. Description The "SS-463L" project was developed by a U.S. Air Force committee in 1957 and awarded to the Douglas Aircraft Company in 1959. The "SS-463L Pallet Cargo Handling System" specifications for aircraft (aka "463L") included a "Master Pallet" design to meet a component of the material handling specifications of this system. The "Master Pallet" was contracted to the AAR Cadillac Manufacturing Corporation, at one time AAR Cadillac Corp, and now AAR Corp. In the 1950s, the U.S. Air Force used a standard designation system for all awarded projects. The "SS" represents Support System, the "463" represents an assigned general system category, 400–499 series for "Support Sy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tandem Wing
QAC Quickie Q2 A tandem wing is a wing configuration in which a flying craft or animal has two or more sets of wings set one behind another. All the wings contribute to lift. The tandem wing is distinct from the biplane in which the wings are stacked one above another, or from the canard or "tail-first" configuration where the forward surface is much smaller and does not contribute significantly to the overall lift. In aviation, tandem wings have long been experimented with, but few designs have ever been put into production. Tandem wings in nature occur only in insects and flying fish, although in the past there have been tandem-wing flying dinosaurs. Design principles A tandem wing configuration has two main wing planes, with one located forward and the other to the rear. The difference is greater than the wing chord, so there is a clear gap between them and the aircraft centre of gravity (CG) lies between the wings.Bottomley (1977) Compared to the conventional layout, wher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Future Combat Systems Manned Ground Vehicles
The Manned Ground Vehicles (MGV) was a family of lighter and more transportable ground vehicles developed by BAE Systems and General Dynamics as part of the U.S. Army's Future Combat Systems (FCS) program. The MGV program was intended as a successor to the Stryker of the Interim Armored Vehicle program. The MGV program was set in motion in 1999 by Army Chief of Staff Eric Shinseki. The MGVs were based on a common tracked vehicle chassis. The lead vehicle, and the only to be produced as a prototype, was the Non-Line-of-Sight Cannon. Seven other vehicle variants were to follow. The MGV vehicles were conceived to be exceptionally lightweight (initially capped at 18 tons base weight) in order to meet the Army's intra-theatre airmobility requirements. The vehicles that the Army sought to replace with the MGVs ranged from 30 to 70 tons. In order to reduce weight, the Army substituted armor with passive and active protection systems. The FCS program was terminated in 2009 due to co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Future Combat Systems
Future Combat Systems (FCS) was the United States Army's principal modernization program from 2003 to early 2009. Formally launched in 2003, FCS was envisioned to create new brigades equipped with new manned and unmanned vehicles linked by an unprecedented fast and flexible battlefield network. The U.S. Army claimed it was their "most ambitious and far-reaching modernization" program since World War II. Between 1995 and 2009, $32 billion was expended on programs such as this, with little to show for it. In April and May 2009, Pentagon and army officials announced that the FCS vehicle-development effort would be canceled. The rest of the FCS effort would be swept into a new, pan-army program called the Army Brigade Combat Team Modernization Program. Development history The early joint DARPA–Army Future Combat Systems program to replace the M1 Abrams main battle tank and Bradley Fighting Vehicles envisioned robotic vehicles weighing under six tons each and controlled remotely ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
