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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).
Around 2005 [13] –2010, [14] Bell and Boeing teamed up again to perform a conceptual study of a larger Quad TiltRotor (QTR) for the US Army's Joint Heavy Lift (JHL) program. The QTR is a larger, four rotor version of the V-22 with two tandem wings sets of fixed wings and four tilting rotors.
Bell 65 ATV ; Bell/Agusta BA609 (tiltrotor), presently known as AgustaWestland AW609; Bell Boeing Quad TiltRotor (proposal) Bell Boeing V-22 Osprey ; Bell Eagle Eye (tiltrotor UAV) Bell V-280 Valor ; Bell X-14 (vectored thrust) Bell X-22 ; Bell XV-3 (first tiltrotor) Bell XV-15 (tiltrotor) Bensen B-10 (ducted fan)
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For the U.S. Department of Defense Joint-service Vertical take-off/landing Experimental (JVX) aircraft program, Bell Helicopter and Boeing Vertol teamed to submit a bid for an enlarged version of the XV-15 in 1983. The Bell Boeing team received a preliminary design contract that year, which led to the Bell Boeing V-22 Osprey. [2]
Bell and Boeing have studied larger Quad Tiltrotor (QTR) military models for possible application to the US Army's Joint Heavy Lift (JHL) program. A Quad Tiltrotor is a larger four rotor version of a Tiltrotor aircraft. It has 2 sets of fixed wings and 4 tilting rotors mounted at the tips of the wings.
Bell-Boeing V-22 Osprey, the only crewed tiltrotor in production to date. A tiltrotor is a type of vertical takeoff and landing (VTOL) aircraft that convert from vertical to horizontal flight by rotating propellers or ducted fans from horizontal positions like conventional aircraft propellers to vertical like a helicopter's rotors.
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