6/7/2023 0 Comments Radioshack quad copter![]() The C-130-size fuselage would have a 747-inch (19.0 m) cargo bay with a rear loading ramp that could carry 110 paratroopers or 150 standard-seating passengers. The conceptual design featured a large tandem wing aircraft with V-22 type engines and 50-foot (15 m) rotors at each of the four wing tips. The DoD also requested information from the aerospace industry on technologies for JFTL in October 2010. In mid-2010, the US DoD was formulating a vertical lift aircraft plan with JFTL as a part. ![]() JHL became part of the new US Air Force/Army Joint Future Theater Lift (JFTL) program in 2008. The teams were to modify their designs to reach new JHL specifications. Army continued the Joint Heavy Lift (JHL) studies with new contracts to the Bell-Boeing and Karem Aircraft/Lockheed Martin teams. However, additional armor on Future Combat Systems manned ground vehicles caused their weight to increase from 20 tons to 27 tons, requiring a larger aircraft. The study was completed in May 2007, with the Quad TiltRotor selected for further development. Pending approval, first flight of a full-scale prototype aircraft was slated for 2012. After submission of initial concept study reports, testing of full-scale components and possibly a sub-scale vehicle test program was expected to begin. īesides the research performed jointly under the contract, Bell has funded additional research and wind tunnel testing in cooperation with NASA and the Army. These tests used a model with a three-bladed rotor, future tests will explore the effects of using a four-bladed system. Alan Ewing, Bell's QTR program manager, reported that "Testing showed those loads from that vortex on the rear rotor same as the loads we see on the front ," and "Aeroelastic stability of the wing looks exactly the same as the conventional tiltrotor". The primary test objective was to study the aeroelastic effects on the aft wing of the forward wing's rotors and establish a baseline aircraft configuration. The "semi-span" model (representing the starboard half of the aircraft) measured 213 inches in length and had powered 91-inch rotors, operational nacelles, and "dynamically representative" wings. A similar arrangement is used on the V-22.Ī one-fifth-scale wind tunnel model has undergone testing in the Transonic Dynamics Tunnel (a unique transonic wind tunnel) at NASA's Langley Research Center during summer 2006. ĭuring the initial baseline design study, Bell's engineers were designing the wing, engine and rotor, while the Boeing team was designing the fuselage and internal systems. The QTR study is one of five designs one of the five is also a Boeing program, an advanced version of the CH-47 Chinook. The contract was awarded to Bell Helicopter, which is teaming with Boeing's Phantom Works. Army's Aviation Applied Technology Directorate for an 18-month conceptual design and analysis study lasting through March 2007, in conjunction with the Joint Heavy Lift program. In September 2005, Bell and Boeing received a cost-sharing contract worth US$3.45 million from the U.S. A parallel Computational Fluid Dynamics (CFD) study confirmed these findings. An experimental investigation in helicopter mode with ground effect found that it was possible to reduce the download on the aircraft from 10% of the total thrust to an upload of 10% of the thrust. This effort was initially funded by NASA/AFDD and subsequently by Bell. įrom 2000 to 2006, studies of the aerodynamics and performance of a Quad Tilt Rotor were conducted at the University of Maryland, College Park. Development was not pursued by the US Department of Defense. Bell received contracts to study related technologies in 2000. The design was downsized to be more V-22-based and to have a payload of 18,000 to 20,000 lb (8,200 to 9,100 kg). This design was to have a maximum takeoff weight of 100,000 lb (45,000 kg) with a payload of up to 25,000 lb (11,000 kg) in a hover. The design was for a C-130-size V/STOL transport for the US Army's Future Transport Rotorcraft program and would have 50% commonality with the V-22. The Bell Boeing team disclosed a Quad TiltRotor design in 1999 which the companies had been investigating during the previous two years. ![]() Development Background īell developed its model D-322 as a quad tiltrotor concept in 1979. 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. Army's Joint Heavy Lift program (a part of Future Vertical Lift program). 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.
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