Volvo RM8
| RM8 | |
|---|---|
| |
| An RM8 on display at the Swedish Air Force Museum | |
| Type | Turbofan |
| Manufacturer | Volvo Flygmotor/Pratt & Whitney |
| First run | 1964 |
| Major applications | Saab 37 Viggen |
| Developed from | Pratt & Whitney JT8D |
The Volvo RM8 is a low-bypass afterburning turbofan jet engine developed for the Saab 37 Viggen fighter. Basically a licensed-built version of the Pratt & Whitney JT8D with a Swedish-designed afterburner, the RM8 was produced by Svenska Flygmotor (now Volvo Aero).[1] In 1962, the basic JT8D-22 engine was chosen to power the Viggen in absence of a suitable and available engine designed for military use.
Variants and applications
- RM8A - AJ 37 Viggen
- RM8B - JA 37 Viggen
Specifications (RM8B)
Data from Flight International.[2]
General characteristics
- Type: Afterburning turbofan
- Length: 6.23 m (20.44 ft)
- Diameter: 1.03 m (40.55 in)
- Dry weight: 2,350kg (5,180lb)
Components
- Compressor: Axial flow, 3-stage fan, 3-stage LP, 7-stage HP
- Combustors: 9 chambers in can-annular arrangement, four injectors per chamber
Performance
- Maximum thrust: 72,2kN (16,200 lbf) dry, 125kN (28,100 lbf) wet
- Overall pressure ratio: 16.5:1
- Bypass ratio: 0.97:1
- Turbine inlet temperature: 1,120°C (RM8A)
- Specific fuel consumption: 65 kg/(kN*hr) (0,64lb/(lbf*hr)) dry, 257 kg(kN*hr) (2,52lb/(lbf*hr)) wet
- Thrust-to-weight ratio: 5.4:1
See also
Related development
Related lists
References
- Notes
- Bibliography
- Gunston, Bill (1999). The Development of Piston Aero Engines, 2nd Edition. Sparkford, Somerset, England, UK: Patrick Stephens, Haynes Publishing. ISBN 0-7509-4478-1.
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External links
Wikimedia Commons has media related to Volvo RM8.
- Saab Viggen engine trivia
- RM8 history in Swedish