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Allison T406 / AE 1107C-Liberty
Rolls-Royce T406

A T406 engine Nacelle on a V-22

The Rolls-Royce T406 (company designation AE 1107C-Liberty) is a turboshaft engine which powers the Bell-Boeing V-22 Osprey tiltrotor. The engine delivers 6,000 shp (4,470 kW) and 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.

In April 2012, the DoD ordered 70 AE 1107C engines for the Osprey, with options for up to 268 engines.

V-22 Osprey


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)



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