Rolls-Royce RB.108
The RB.108 is a very simply constructed and light jet engine from the British manufacturer Rolls-Royce from the 1950s. Due to the special type of shaft bearings and the type of lubrication system, the engine is particularly designed for vertical installation in aircraft.
history
The development of the RB.108 was announced in November 1955. The type test thrust was 9 kN (2030 lb), in addition 11% of this thrust can be delivered as bleed air to the control devices of a VTOL aircraft, which take control of all three axes when hovering. The thrust-to-weight ratio, which is an important parameter for suitability as a lift engine, is 8: 1. The further development of the RB.108 is the RB.145 .
commitment
- Short SC.1 : five RB.108s, four lift engines, one cruise engine
- Dassault Balzac V : eight RB.108 lift engines
- VFW SG 1262 : eight RB.108 in the suspension frame for testing the control devices of the VFW-Fokker VAK 191 B
- Planned use in various unrealized projects in the late 1950s.
Technical specifications
| Parameter | Data |
|---|---|
| Type | Axial turbojet |
| compressor | eight-stage axial compressor made of aluminum, one-piece aluminum housing, compression ratio 5.33: 1, mass flow: 17.6 kg / s |
| Combustion chamber | Annular combustion chamber |
| fuel | Avtur (Aviation Turbine Fuel), corresponds to NATO F-35 |
| Guide vanes | Hollow, made from Nimonic 90 |
| turbine | two-stage axial turbine gas temperature after the turbine: 998 K |
| Max. Diameter | 0.528 m |
| length | 1,227 m |
| Front cross-section | 0.21 m² |
| Weight (dry) | 122 kg |
| Nominal thrust | 9.9 kN (including bleed air for the control) |
literature
- John WR Taylor (Ed.): Jane's All The World's Aircraft - 1965–66. Sampson Low, Marston & Company Ltd., London 1965.