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).
New procedure for fitting speedometers to experimental cars by The A.T. Speedometer Co. Ltd.
| Identifier | ExFiles\Box 165\2\ img189 | |
| Date | 11th January 1939 | |
| To Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies} Fm/RC.{R. Childs} 6065- BY/RD.4/B.11.1.39. SPEEDOMETERS FOR EXPERIMENTAL CARS. Owing to last minute changes of Wheels, Tyres, Axle Ratio etc., all of which affect the speedometer ratio, the speedometers in future will be fitted by The A.T. Speedometer Co.Ltd., when the chassis are at the Coachbuilder's. Will you please arrange to give us the Axle Ratio, Tyre Size, Rim Size, prior to the chassis leaving, to enable us to advise the A.T. Co. This will avoid the charges they are now making for correcting instruments after delivery. The length of the speedometer drive needed, should also be obtained, and this will be ordered at the same time. BY/HL | ||