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).
Recommendation for speedometer calibration standards for S.S. and 20 HP models.
| Identifier | ExFiles\Box 6\4\ 04-page224 | |
| Date | 4th July 1922 | |
| X5310, To Rv. From Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} Copy to Mr. EFC. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}/L.4.7.22 x7310 x4308 S.S. and India LV Speedometers. In view of the fact that S.S.owners may fit 20" rims with the smaller tyres to their cars, and 20 HP.owners 19" rims. We recommend that the S.S.speedometer standard should be 775 cable revs. per mile and the 20 HP sanke revs 720 cable revs. per mile. This will ensure that the speedometers do not read slow under any conditions. Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||