Rolls-Royce Exe
The Rolls-Royce Exe (originally Rolls-Royce Boreas ) was an aircraft engine made by the British manufacturer Rolls-Royce , which deviated far from the design lines otherwise applicable there.
history
It was an air-cooled 24-cylinder X-engine designed by Arthur Rowledge . Development began in 1935. It was intended for installation in the Fairey Barracuda . A special feature was the control of the gas exchange by means of slide valves after this principle had already been installed on a trial basis in a Rolls-Royce Kestrel in 1934 and tested on the test bench. The pistons transmitted their movement via the main and secondary connecting rods to the crankshaft, which drove the propeller via a reduction gear (i = 2.79). In the turbocharged engine with a single-stage centrifugal compressorthe spark plugs were supplied by a coil ignition . The first test bench runs in September 1936 resulted in an output of 920 hp up to a full pressure altitude of 3300 m.
The first flight with this engine took place on November 30, 1938 in a Fairey Battle . It worked satisfactorily, but showed high oil consumption. The development was shut down in 1938 because of the improved performance of the Rolls-Royce Merlin . The test vehicle, however, was used as a liaison aircraft until 1943.
The knowledge gained with this design resulted in the much larger Rolls-Royce Pennine .
Technical specifications
- Bore: 106.7 mm
- Stroke: 101.6 mm
- Displacement: 22.1 l
- Power: 1150 hp at 4200 min -1
- Compression: 8: 1
swell
- Flight , May 7, 1954.
- Bill Gunston: Lexicon of the aircraft engines. Motorbuch-Verlag, Stuttgart 1991, ISBN 3-613-01422-X .
- Alec SC Lumsden: British Piston Aero Engines and their Aircraft. Airlife, Shrewsbury 1994, ISBN 1-85310-294-6 .