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).
Requesting an order for speedometers for the Wraith chassis, specifying the required calibration.
| Identifier | ExFiles\Box 165\2\ img026 | |
| Date | 18th February 1937 | |
| SECRET. 6065 HPS{Horace Percy Smith - Experimental Factory Mgr}/CEP from Rm{William Robotham - Chief Engineer}/Wst. c to Wst/CAP Rm{William Robotham - Chief Engineer}/Wst7/M.18.2.37. Speedometer for Wraith Chassis. Will you please order speedometers for the further Wraith chassis, which are to be built. We understand from the Drawing Office that there will be no difference in the details affecting the speedometer, from the first chassis, so that an instrument similar to the first one obtained should be ordered. This will be suitable for a back-axle ratio of 9/41 and have a calibration of 772 revs. per mile. Rm{William Robotham - Chief Engineer}/Wst. | ||