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 the recalibration of a speedometer for Wraith car 28.G.VI due to a change in the rear axle ratio.
| Identifier | ExFiles\Box 165\2\ img168 | |
| Date | 31th March 1938 | |
| To HPS{Horace Percy Smith - Experimental Factory Mgr}/WSC.{W. S. Cassel} c. to RC{R. Childs}/CAP. 6065 Rm{William Robotham - Chief Engineer}/RC.{R. Childs}11/JH.31.3.38. SPEEDOMETER FOR CAR 28.G.VI. Owing to the rear axle being changed to one of ratio 8/34, it is necessary for the speedometer on Wraith car 28.G.VI. to be altered. Will you please arrange for this instrument No.U.898 to be returned to the makers with the request that the calibration value be altered from 776 revs. per mile to 732 revs per mile. Rm{William Robotham - Chief Engineer}/RC.{R. Childs} | ||