Specification sheet detailing the characteristics of Goshawk 11 wheels.
| Identifier | ExFiles\Box 106\4\ scan0059 | |
| Date | 28th June 1923 | |
| X3599 28.6.23. DETAILS OF GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) 11. WHEELS. X3599 X4538 Weight of Whitworth wire wheel = 26.5 lbs. Wt. of 820 X 120 beaded edge cord tread tyres - = 30 1/4 lbs. Effective tyre dia. inflation pressure - = 40/45 lbs. per sq. in = 31.4" Revolutions per mile - = 642.5 1 rev. dynamometer drum - = 1.5286 revs. of wheel. | ||
From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).