Rolls-Royce Hawk
The Rolls-Royce Hawk was an aircraft engine made by the British manufacturer Rolls-Royce from the time of the First World War, which was the only single -row engine from the company that deviated from its usual 12-cylinder design (in a vertical V-shape ).
The designation of the motor is derived in accordance with the then Rolls-Royce tradition from the birds and means Habicht (English: Hawk ).
history
It was a water-cooled six-cylinder in-line engine with direct propeller drive. The development of this engine, which initially had 75 hp and was intended for installation mainly in training aircraft , began in 1914. The cylinders were grouped in groups of three, but each cylinder had its own cooling jacket. The gas exchange was controlled by an overhead camshaft driven by a vertical shaft , which operated the two hanging valves of the individual cylinders. The engine could with one or two Claudel-Hobson - carburetors be equipped (Type FZR with 28 mm nominal diameter). A single Dixie magnet provided the ignition.
Because Rolls-Royce was at full capacity, production was outsourced to Brazil Straker , where 204 engines were manufactured between August 1914 and December 1918. A sample engine had previously been supplied by Rolls-Royce.
Because the Hawk was considered particularly reliable, it was also selected for airships that had to stay in the air for over 50 hours on patrol trips. These motors had a hand crank with a reduction gear so that they could be started manually.
The Hawk II version achieved up to 105 HP at 1500 min − 1 by increasing the permissible speeds. However, only small numbers of these engines were produced for test purposes.
Applications
- Sage III
- Farman MF7
- Royal Aircraft Factory BE2
- Avro 504 F
- Airships of the type SS
Technical specifications
- Bore: 101.6 mm
- Stroke: 152.4 mm
- Displacement: 7412 cm³
- Power: 75 hp at 1350 min − 1, later 100 hp at 1500 min − 1
- mechanical limit speed: 1700 min − 1
- Compression: 5.1: 1
- Length: 1190 mm
- Width: 597 mm
- Height: 902 mm
- Weight: 184 kg
swell
- British airships
- Flight. May 7, 1954.
- Flight. July 27, 1939.
- Jane's All the World's Aircraft. 1919.
- Alec SC Lumsden: British Piston Aero Engines and their Aircraft. Airlife, Shrewsbury 1994, ISBN 1-85310-294-6 .
