| Hawk | |
|---|---|
 Preserved Rolls-Royce Hawk | |
| Type | Liquid-cooledinline piston engine |
| Manufacturer | Rolls-Royce Limited |
| First run | 1914 |
| Major applications | SSZ class blimp |
| Number built | 205 |
TheRolls-Royce Hawk was a Britishaero engine designed byRolls-Royce in 1915. Derived from one bank of six cylinders of theRolls-Royce Eagle, it produced 75horsepower at 1,370 rpm. Power was progressively increased to 91 hp by February 1916, and 105 hp by October 1918.[1]
After Rolls-Royce made the prototypes, the Hawk was manufactured under licence byBrazil Straker in Bristol between 1915 and 1918. During this period 204 engines were built, and the Hawk earned a reputation for high reliability.
Many engines of this type were used to power theSSZ class coastal patrol airships of which 76 were built.
Post war one engine (serial number 332) was fitted into a specially built hull and launched onWindermere in 1922 with the nameCanfly. With a flywheel added it was directly connected to the boat's propeller without a gearbox. Capable of reaching speeds of 26 knots (30 mph; 48 km/h)Canfly was used as the official's boat at several world speed record attempts during the 1920s and 1930s. The boat and engine are now displayed in a working but non-operational state at theWindermere Jetty museum.[2]
Data fromLumsden[3]
Comparable engines
Related lists
