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).
Production of the 'SS' servo and brake mechanism, particularly concerning the servo linings.
| Identifier | ExFiles\Box 16\3\ Scan041 | |
| Date | 13th March 1929 | |
| To BY.{R.W. Bailey - Chief Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} X7370 Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}3/LG13.3.29. 'SS{S. Smith}' SERVO MECHANISM. X7420 We consider that it will be safe to proceed with the SS.{S. Smith} servo and brake mechanism with the exception of cams, and servo linings for a further series of material after the first 50 cars. We are not yet certain that we shall use Ferodo servo linings even on the first 50 cars, but it appears to be necessary to order these so that we shall not be held up for a lining. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||