Calculation and diagram for speedometer drive gearing on a PII model.
| Identifier | ExFiles\Box 59\2\ Scan023 | |
| Date | 16th April 1930 guessed | |
| -2- speedometer drive revs/mile becomes :- 618.1 x 41/11 x 2/18 x 26/8 = 833. S.T.D. Speedometer Drive Gearing PII Speedo-drive 18 26 18 THIS WHEEL HAS 19 TEETH ON 22EX. 2 2nd 3rd Motion Shaft. HS {Lord Ernest Hives - Chair} /AJL. | ||
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).