Rolls-Royce Ex ( Eng. Rolls-Royce Exe ) or Boreas [1] ( Eng. Boreas ) - 24-cylinder X-shaped air-cooled engine, designed primarily for the new deck-based strike aircraft Fairey Barracuda . Exe developed enough power for its time (about 1100 hp), had high specific indicators (working volume of only 22 liters, while Merlin had comparable power of 27 liters) and was quite compact thanks to the X-shaped layout .
| Rolls-royce exe | |
|---|---|
| Manufacturer | Rolls royce limited |
| Years of production | 1936 |
| Specifications | |
| Volume | 22.1 l |
| Power | 1150 h.p. (856 kW) |
| Power density | 38.7 kW / l |
| Compression ratio | 8: 1 |
| Bore | 107.3 mm |
| Piston stroke | 101.6 mm |
| Number of cylinders | 24 |
| Valves | sleeve gas distribution |
| Compressor | single-stage monitoring station |
| Fuel type | petrol |
| Cooling system | forced air |
| Dimensions | |
| Dry weight | 694 kg |
The development of Exe began in the late 30s. simultaneously with Peregrine and Vulture , but was suspended in 1939, [2] and finally discontinued in 1940 [3] . Ernest Hives The director of the Rolls-Royce aircraft engine department decided to stop the work on these three engines in order to focus on Merlin and Griffon . Later, already during the war, an enlarged version of the Exe was built under the name Pennine , but it was also abandoned, since the development of turbojet engines became the company's priority.
The name Exe was given in honor of the River Ex ; hereinafter, the names of the rivers were used by Rolls-Royce for gas turbine engines .
Content
- 1 Application
- 2 Specification
- 2.1 Key Features
- 2.2 Features
- 2.3 Performance
- 3 See also
- 3.1 Related developments
- 3.2 Similar engines
- 4 notes
- 5 Literature
- 6 References
Application
Designed originally for the Supermarine Type 322 and Fairey Barracuda , Exe was only installed on Fairey Battle for testing. The first flight took place on November 30, 1938. This aircraft was later used as a connected one, and the engine proved to be quite reliable in operation [4] .
Specification
Main characteristics
- Type: piston inline four-stroke X-shaped 24-cylinder air-cooled engine
- Bore: 107.3 mm
- Piston stroke: 101.6 mm
- Engine displacement: 22,1 l
- Dry weight: 694 kg
Features of functioning
- Valves: Sleeve Timing
- Compressor : single-stage single-speed monitoring station
- Fuel type: gasoline
- Cooling system: air, forced circulation
Performance
- Output power: 856 kW (1150 hp) at 4,500 rpm and a boost pressure of 0.32 kgf / cm 2
- Power density : 38.7 kW / l (50.04 hp / l)
- Compression ratio : 8: 1
- Specific power by weight: 1.23 kW / kg (1.66 hp / kg)
See also
Related Development
- Rolls-royce pennine
Similar engines
- Allison v-3420
- Junkers jumo 222
- Napier saber
Notes
- ↑ This name was abandoned due to a possible confusion with the Bristol Aeroplane Company engine range named after the characters of Greek mythology, Lumsden 2003, p.201.
- ↑ Lloyd 1978, p. 4-5.
- ↑ Pugh 2000, p. 263-265.
- ↑ Rubbra 1990, p. 148.
Literature
- Gunston, Bill . World Encyclopaedia of Aero Engines . Cambridge, England. Patrick Stephens Limited, 1989. ISBN 1-85260-163-9
- Lloyd, Ian Rolls-Royce: The Merlin at War (1978, Macmillan London) ISBN 0-333-24016-2
- Lumsden, Alec. British Piston Engines and their Aircraft . Marlborough, Wiltshire: Airlife Publishing, 2003. ISBN 1-85310-294-6 .
- Pugh, Peter. The Magic of a Name: The Rolls-Royce Story, The first 40 Years (2000, Icon Books Cambridge) ISBN 1-84046-151-9
- Rubbra, AA Rolls-Royce Piston Aero Engines - a designer remembers: Historical Series no 16 : Rolls Royce Heritage Trust, 1990. ISBN 1-872922-00-7
Links
- Fairey Battle with Exe engine (upper picture) in Flight Magazine 1948