Osprey Tiltrotor
by Richard Reeve
Title
Osprey Tiltrotor
Artist
Richard Reeve
Medium
Photograph - Photograph
Description
Close up of the tiltrotors of the remarkable Boeing Osprey vertical take off and landing (VTOL) aircraft.
The Osprey is the world's first production tiltrotor aircraft, with one three-bladed proprotor, turboprop engine, and transmission nacelle mounted on each wingtip. It is classified as a powered lift aircraft by the Federal Aviation Administration. For takeoff and landing, it typically operates as a helicopter with the nacelles vertical and rotors horizontal. Once airborne, the nacelles rotate forward 90� in as little as 12 seconds for horizontal flight, converting the V-22 to a more fuel-efficient, higher speed turboprop aircraft. Short take off and landing (STOL) rolling-takeoff and landing capability is achieved by having the nacelles tilted forward up to 45�. Other orientations are possible, such as the "80 Jump" takeoff which uses nacelles at 80� to quickly achieve high altitude and speed.
Composite materials make up 43% of the airframe, and the proprotor blades also use composites. For storage, the V-22's rotors fold in 90 seconds and its wing rotates to align, front-to-back, with the fuselage. Due to the requirement for folding rotors, their 38-foot diameter is 5 feet less than optimal for vertical takeoff, resulting in high disk loading.
Uploaded
March 18th, 2015
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