The cam angle used on the Phantom servo and brakes.
| Identifier | ExFiles\Box 12\5\ 05-page067 | |
| Date | 22th December 1928 | |
| X7420 To DA. {Bernard Day - Chassis Design} from Hs {Lord Ernest Hives - Chair} /Rn. {Mr Robinson} c. to BY. {R.W. Bailey - Chief Engineer} c. to Wor. {Arthur Wormald - General Works Manager} Hs {Lord Ernest Hives - Chair} /RM {William Robotham - Chief Engineer} 3/LG22.12.28. 'SS {S. Smith} ' SERVO AND BRAKES. X7370 ----- X7420 With reference to DA {Bernard Day - Chassis Design} 1/M18.12.28. We find the present angle of cam being used on the Phantom is 55° and not 45° as we assumed. This will reduce the theoretical discrepancy between the performance of the two servos, but in practice we are having to work with 30° cams on all chassis to get an appreciable amount of front braking. Hs {Lord Ernest Hives - Chair} /Rn. {Mr Robinson} | ||
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).