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).
Cam angle for the 'SS' servo and brakes on the Phantom chassis.
| Identifier | ExFiles\Box 16\3\ Scan033 | |
| Date | 22th December 1928 | |
| 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} X7370 Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}3/LG22. 12.28. 'SS{S. Smith}' SERVO AND BRAKES. Y7420 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} | ||