The re-calibration of a Wraith speedometer to suit a new rear axle ratio.
| Identifier | ExFiles\Box 165\2\ img179 | |
| Date | 17th June 1938 | |
| 605-1 To D {John DeLooze - Company Secretary} /HP. from HPS {Horace Percy Smith - Experimental Factory Mgr} /WSC. {W. S. Cassel} cr {Mr Cra’ster / Mr Chichester} Hd {Mr Hayward / Mr Huddy} /FC. cr {Mr Cra’ster / Mr Chichester} Roy. {Mr H. Royce - Buyer} c. Rm {William Robotham - Chief Engineer} /RC. {R. Childs} R Childs HPS {Horace Percy Smith - Experimental Factory Mgr} /WSC. {W. S. Cassel} 8/VS. {J. Vickers} 17.6.38. O {Mr Oldham} /52435. WRAITH SPEEDOMETER. We hand you herewith :- 1 A.T. Speedometer No.S.919. Will you please return same to the makers for re-calibration, from its present value of 776 R.P.M. to 732 R.P.M. This is required to suit a rear axle ratio of 8 x 34. Will Roy. {Mr H. Royce - Buyer} please place an official order for this work to be carried out. HPS {Horace Percy Smith - Experimental Factory Mgr} /WSC. {W. S. Cassel} | ||
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).