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The J85 and lift-fan combination was a precursor to developments which led to the first GE high BPR engine, the TF-39. [4] The lift fans were driven by turbine blades mounted around the periphery of the fan, with mass flow 13 times greater than the gas generators mass flow and increased thrust 3 times over that available using a propelling nozzle.
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.
the rear of the F135 engine (nozzle rotated down) that powers the Rolls-Royce LiftSystem. Instead of using separate lift engines, like the Yakovlev Yak-38, or rotating nozzles for engine bypass air, like the Harrier, the "LiftSystem" has a shaft-driven LiftFan, designed by Lockheed Martin and developed by Rolls-Royce, [3] and a thrust vectoring nozzle for the engine exhaust that provides lift ...
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. [1] During 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. [9] A similar arrangement is used on the V-22.
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 ]
[1] [7] [9] For a thin 32-blade fan, the strength of carbon fiber composite material is strong enough, [1] with a weight of only 1.05% of the total aircraft weight. [1] The total weight of the lift fan system including the bearings, gears, and rings can be hopefully controlled to less than 5% of the aircraft weight. [1]
Boeing Rotorcraft Systems (formerly Boeing Helicopters and before that Boeing Vertol) is the former name of an American aircraft manufacturer, now known as Vertical Lift division of Boeing Defense, Space & Security. The headquarters and main rotorcraft factory is in Ridley Park, Pennsylvania, a suburb of Philadelphia.
Inclined elevator design is based on the same basic technology as conventional, vertical elevator. [6] In general standard elevator equipment can be adapted for systems with an inclines up 10 ° from vertical, while an incline with more than 20° from vertical will require some additional adaptation.