|T406 / AE 1107C-Liberty|
|A T406 engine Nacelle on a V-22|
|National origin||United States|
|Manufacturer||Allison Engine Company
|Major applications||V-22 Osprey|
The Rolls-Royce T406 (company designation AE 1107C-Liberty) is a turboshaft engine which powers the Bell-Boeing V-22 Osprey tiltrotor. The Osprey is in service with the United States Marine Corps and United States Air Force. The engine delivers 6,000 shp (4,470 kW).
The V-22's T406 powerplants are housed in wing-tip tilting nacelles, allowing the distinctive flight characteristics of the V-22. For take off and landing the nacelles are directed vertically (90° to fuselage), while for forward flight they are rotated parallel to fuselage. The engine has been considered as a cost-effective upgrade for existing heavylift helicopters such as the CH-47 Chinook and the CH-53.
Specifications (T406) 
- Type: Turboshaft
- Length: 78.1 in (1,980 mm)
- Diameter: 34.2 in (890 mm)
- Dry weight: 971 lb (440 kg)
- Compressor: 14-stage high pressure axial compressor
- Turbine: 2-stage high pressure and 2-stage power turbine
- Maximum power output: 6,150 shp (4,586 kW)
- Overall pressure ratio: 16.7:1
- Power-to-weight ratio: 6.33 shp/lb (10.4 kW/kg)
See also 
- Related development
- Related lists
- "Rolls-Royce Awarded $598 M V-22 Engine Contract" AeroNews, 24 April 2012. Retrieved 24 April 2012.
- Benbow, Dana Hunsinger. "Rolls-Royce to produce engines for Navy's new hovercraft fleet." Indianapolis Star, 22 October 2012.
- Leyes II, Richard A.; William A. Fleming (1999). The History of North American Small Gas Turbine Aircraft Engines. Washington, DC: Smithsonian Institution. ISBN 1-56347-332-1.
|This aircraft engine article is missing some (or all) of its specifications. If you have a source, you can help Wikipedia by adding them.|