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The Bell V-280 Valor is a tiltrotor aircraft being developed by Bell Helicopter for the United States Army's Future Vertical Lift (FVL) program. [2] The aircraft was officially unveiled at the 2013 Army Aviation Association of America's (AAAA) Annual Professional Forum and Exposition in Fort Worth, Texas.
[1] The FAA states "The height–velocity diagram or H/V curve is a graph charting the safe/unsafe flight profiles relevant to a specific helicopter. As operation outside the safe area of the chart can be fatal in the event of a power or transmission failure it is sometimes referred to as the dead man's curve."
Future Vertical Lift (FVL) is a plan [1] to develop a family of military helicopters for the United States Armed Forces. Five different sizes of aircraft are to be developed, sharing common hardware such as sensors, avionics, engines, and countermeasures. [2] The U.S. Army has been considering the program since 2004. [3]
For helicopter movement, the chart shall provide information between the helicopter stand, the touchdown and lift-off area, and the final approach and take-off area; the chart should also supplement information along helicopter ground and air taxiways and air transit routes. In addition, essential operational information should also be provided ...
The Transcendental 1-G is the first tiltrotor aircraft to have flown and accomplished most of a helicopter to aircraft transition in flight (to within 10 degrees of true horizontal aircraft flight). Built in 1953, the experimental Bell XV-3 flew until 1966, proving the fundamental soundness of the tiltrotor concept and gathering data about ...
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Their transport helicopters are the most-used in the Army currently. [12] Up to 2013, Sikorsky and partners have spent $250 million on X2 and Raider. [6] The team and aircraft will be separate from the S-97 Raider. [10] The team feels confident in the SB-1 Defiant and is paying for more than half of its design costs.