|M45H engine on display|
|National origin||United Kingdom / France|
|Major applications||VFW-Fokker 614|
|Developed from||SNECMA M45|
Design and developmentEdit
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.
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).
The engine was developed at the time of the Rolls-Royce bankruptcy which resulted in delays in developing the engine.
- Civil low bypass turbofan 7,915 lbf (35.21 kN) for take-off.
- Military low bypass turbofan 13,200 lbf (58.72 kN) for take-off, wet.
- Civil medium bypass turbofan 7,880 lbf (35.05 kN) for take-off, wet.
- Rolls-Royce designation for the M45SD-02 geared turbofan
- citation needed] [
Engines on displayEdit
Rolls-Royce/SNECMA M45H engines are on display as part of the aero engine collection at the Royal Air Force Museum Cosford and the Musée aéronautique et spatial Safran. Additionally, an engine, with its cowl and pylon, is displayed at the Deutsches Museum Flugwerft Schleissheim; this museum also displays a VFW-614, which has two engines mounted.
Specifications (M45H Mk.501)Edit
Data from Jane's All the World's Aircraft 1971-72.
- Type: Turbofan
- Length: 2,600 mm (102.4in)
- Diameter: 909 mm (35.8 in)
- Dry weight: 673 kg (1,483 lb)
- Compressor: 5-stage intermediate pressure and 7-stage high-pressure axial compressor with a single-stage fan
- Bypass ratio: 2.85:1
- Combustors: Annular with 24 vapourising burners
- Turbine: 3-stage low pressure and single-stage high pressure turbines
- Fuel type: Aviation kerosene (JetA-1 typically)
- Oil system: pressure return system at 207 kPa (30 psi)
- Flight 6 January 1966
- Swanborough 1971, p.371.
- Wilkinson, Paul H. (1966). Aircraft engines of the World 1966/77 (21st ed.). London: Sir Isaac Pitman & Sons Ltd. pp. 165–167.
- J W R Taylor 1971,p.650.
- "Archived copy" (PDF). Archived from the original (PDF) on 6 June 2011. Retrieved 21 October 2007.CS1 maint: archived copy as title (link)
|Wikimedia Commons has media related to Rolls-Royce/SNECMA M45H.|
- Stol Fans from Dowty a 1971 Flight article