Rolls-Royce AE 1107C Turboshaft: The 7,000 shp Engine Behind the V-22 Osprey Tiltrotor — Full Technical Profile 2026
The Rolls-Royce AE 1107C (military designation T406) is the turboshaft engine that makes the Bell-Boeing V-22 Osprey’s unique tiltrotor capability possible. Producing 6,150 shp in production configuration — and 8,800+ shp in tested Block 3+ trim — it must function reliably at every angle from 0° (helicopter hover) to 90° (turboprop cruise), a demand no conventional turboshaft design meets.
Development History
Originally developed by Allison Engine Company from 1985 under the JVX programme, the T406 first ran in 1987 and powered V-22’s maiden flight on 19 March 1989. When Rolls-Royce acquired Allison in 1995, the engine was redesignated AE 1107C and development continued. Full operational capability was declared in 2007. The FLRAA programme (Bell V-280 Valor) uses a derivative AE 1107 to replace the Black Hawk.
Technical Specifications
| Parameter | Value |
|---|---|
| Configuration | Two-spool axial free-turbine turboshaft |
| Rated Power | 6,150 shp (4,590 kW) production |
| Tested Power (Block 3+) | 8,800+ shp |
| Compressor | 14-stage axial; 6-stage VIGV |
| Turbine | 2-stage gas generator + 2-stage free-power turbine |
| Control | Dual-channel FADEC |
| Oil System | Self-contained; vertical operation capable |
| Operating Temp | -54°C to +49°C |
Operators
- USMC MV-22B: 360 aircraft, 720 engines — assault support missions
- USAF AFSOC CV-22B: 56 aircraft, 112 engines — special operations
- USN CMV-22B: 53 aircraft, 106 engines — carrier onboard delivery
- Japan JGSDF MV-22B: 17 aircraft, 34 engines — Southwest Islands defence
Combat Record
MV-22B entered combat in Iraq in 2007 and served throughout Afghanistan (2009–2021), where its 509 km/h cruise speed and 576 km combat radius significantly exceeded the UH-60. CV-22B aircraft have supported classified AFSOC operations worldwide. No combat losses have been attributed to AE 1107C engine failure; accident investigations have consistently pointed to vortex ring state or crew factors rather than propulsion issues.
Competitors
There is no direct competitor to the AE 1107C because no other production aircraft requires a turboshaft to operate across the 0°–90° nacelle envelope. The closest in raw power is the GE T408-GE-400 (7,500 shp, CH-53K King Stallion), but that engine is purely rotary-wing optimised and cannot perform turboprop-mode operation.
Turkey Assessment
Turkey has no tiltrotor programme and no turboshaft in the AE 1107C’s power class. TEI-TS1400 (1,740 shp) addresses a completely different weight category. The V-22/AE 1107C combination represents a capability gap — particularly relevant for Aegean island assault scenarios and long-range special operations — but bridging it would require platform acquisition (V-22 is only sold to close allies) or an entirely new national tiltrotor programme that does not currently exist in Turkey’s defence roadmap.
