Bell Helicopter and Boeing showcase concept of cargo tiltrotor at Sea-Air-Space is largest maritime exposition in the U.S..

The Bell Boeing Quad TiltRotor (QTR) is a proposed four-rotor derivative of the V-22 Osprey tiltrotor developed jointly by Bell Helicopter and Boeing.

Bell announced in early 1999 that it was studying a proposed Quad TiltRotor (QTR) to meet Future Transport Rotorcraft (FTR) requirements. As projected, the aircraft would feature a fuselage approximately the size of that of a Lockheed-Martin C-130-30, mated to two sets of wings, engines and tiltrotors from the Bell Boeing V-22 Osprey, the rear units mounted on stub wings to extend span and ensure adequate fuselage clearance.

Rear tiltrotors could fold in cruising flight, with their engines providing supplemental thrust. The Quad TiltRotor would be able to accommodate up to 90 passengers, or an AH-64, AH-1Z, RAH-66, UH-1Y or UH-60 helicopter, or three HMMWVs, or up to eight 463L pallets.