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).
Letter to S. Smith & Sons requesting the revolutions per mile for a sample speedometer to be tested with 33 X 5' tyres.
| Identifier | ExFiles\Box 51\3\ Scan007 | |
| Date | 28th September 1921 | |
| X436) Hsl/LG. 28th. Sept. 1921. S. Smith & Sons (M.A)Ltd., Speedometer House, 179-185 Gt. Portland St. {Capt. P. R. Strong} , London W.1. Dear Sirs, For the attention of Mr. C.W.Nichols. With reference to the sample Speedometer you have sent to us for test. As we intend to test this Speedometer on a car fitted with a mechanical drive, could you please let us know the revolutions per mile of this speedometer when using 33 X 5" tyres. Yours faithfully, R.R.23A.(10T/S.H./osc.19-2-21)C.3003 | ||