| M45H | |
|---|---|
 M45H engine on display | |
| Type | Turbofan |
| National origin | United Kingdom /France |
| Manufacturer | Rolls-Royce/SNECMA |
| First run | 1970 |
| Major applications | VFW-Fokker 614 |
| Developed from | SNECMA M45 |
TheRolls-Royce/SNECMA M45H is an Anglo-French mediumbypass ratio turbofan produced specifically for the twin-enginedVFW-Fokker 614 aircraft in the early 1970s.
The design was started as a collaborative effort betweenBristol Siddeley andSNECMA.[1]
The VFW 614 was designed to operate over short sectors with up to a dozen flights a day. The engines were optimized for 30-minute sectors at a cruise altitude of 21,000 feet at Mach 0.65. Only a few minutes would be spent at the cruise rating and most of the flight would be at the higher climb rating or at a descent setting. The engine had a low turbine entry temperature and comparatively low rotational speed.[2]
The engine was designed to be uprated without drastic redesign. Three options were water injection (+10% thrust), improved HP turbine (+10% thrust), addition of a zero-stage to the LP compressor (+25% thrust).[2] The M45H-01 was to have athrust-specific fuel consumption (TSFC) of 12.91 grams per kilonewton per second (0.456 pounds per pound-force per hour).[3]
The engine was developed at the time of the Rolls-Royce bankruptcy which resulted in delays in developing the engine.[4]
Rolls-Royce/SNECMA M45H engines are on display as part of the aero engine collection at theRoyal Air Force Museum Cosford and theMusée aéronautique et spatial Safran. Additionally, an engine, with its cowl and pylon, is displayed at theDeutsches Museum Flugwerft Schleissheim; this museum also displays a VFW-614, which has two engines mounted.
Data fromJane's All the World's Aircraft 1971-72.[6]
Related development
Comparable engines
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