Speedometer correction test results for the Hawk Northcliffe car's Elliott speedometer.
| Identifier | ExFiles\Box 8\2\ 02-page32 | |
| Date | 23th November 1922 | |
| Mr. Hives from TMW. X613 23.11.22. RE. HAWK(Aero Engine) NORTHCLIFFE CAR. ELLIOTT SPEEDOMETER CORRECTION. V613 / X3408 Indicated reading. M.P.H. 10 20 30 40 50 60 70 Actual reading. M.P.H. 9.8 18.8 29 38.6 47.5 56.4 65.3 Distance measured by a revolution of rear wheel = 104.5" TMW. | ||
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).