Goshawk 11 wheels including weight, tyre specifications, pressure, and revolutions per mile.
| Identifier | ExFiles\Box 107\4\ scan0045 | |
| Date | 28th June 1923 | |
| X4538 28.6.23. X4538 ----- X3599 DETAILS OF GOSHAWK(Aero Engine)(Codename for 20HP Car / Aero Engine after Kestrel(Aero Engine)) 11. WHEELS. (Weight of Whitworth wire wheel = 26.5 lbs.) Wt. of 820 X 120 beaded edge cord tread tyres - = 30¼ 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. ----------------------- 1084 | ||
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).