Query regarding the correct angle for the Phantom servo operating cams, seeking confirmation between 45° and 55°.
| Identifier | ExFiles\Box 12\5\ 05-page065 | |
| Date | 18th December 1928 | |
| Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} from DA. {Bernard Day - Chassis Design} c. to X7420 DA {Bernard Day - Chassis Design} 1/M18.12.28. 'SS {S. Smith} ' SERVO & BRAKES. X.7370 XJ420 The detail drgs. of the Phantom servo operating cams which we have give a 55° angle. We recollect your speaking of a 45° angle. Would you please confirm which is the angle now used. We have looked through our calculations but as they have been based on a 55° angle in the present Phantom we cannot give any further instructions until we are sure of the actual angle that is used. DA. {Bernard Day - Chassis Design} | ||
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).