Rolls-Royce T406
| T406 / AE 1107C-Liberty | |
|---|---|
 | |
| A T406 engine Nacelle on a V-22 | |
| Type | Turboshaft |
| National origin | United States |
| Manufacturer | Allison Engine Company Rolls-Royce plc |
| Major applications | V-22 Osprey |
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The Rolls-Royce T406 (company designation AE 1107C-Liberty) is a turboshaft engine that 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).
Design
The T406/AE1107C Liberty shares a common core with the AE 3007 and AE 2100 series of engines.
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.[1]
In 2009 the GAO found that the engines failed after less than 400 hours of service, as compared to the estimated life of 500–600 hours.[2] Multiple updates to the engine platform in 2012-2013 have increased the lifespan significantly.
In April 2012, the DoD ordered 70 AE 1107C engines for the Osprey, with options for up to 268 engines.[3]
Engines with a future block 4 upgrade are expected to deliver ten thousand horsepower.[4]
The MT7 gas turbines that will be used to power the Ship-to-Shore Connector are a derived design of the T406.[5]
Applications
Specifications (T406)
General characteristics
- Type: Turboshaft
- Length: 78.1 in (1,980 mm)
- Diameter: 34.2 in (890 mm)
- Dry weight: 971 lb (440 kg)
Components
- Compressor: 14-stage high pressure axial compressor
- Turbine: 2-stage high pressure and 2-stage power turbine
Performance
- 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
References
- ↑ http://www.rolls-royce.com/defence/products/transporters/ae_1107C_liberty.jsp
- ↑ "Pentagon watchdog to release classified audit on V-22 Osprey."
- ↑ "Rolls-Royce Awarded $598 M V-22 Engine Contract" AeroNews, 24 April 2012. Retrieved 24 April 2012.
- ↑ "Rolls-Royce Boosts Power for V-22 Engines."
- ↑ 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.
External links
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