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).
Confirming instructions to fit up the 21-EX car with original W.W. leverage and 45° cams in the servo.
| Identifier | ExFiles\Box 16\3\ Scan048 | |
| Date | 4th April 1929 | |
| To RHC.{R. H. Coverley - Production Engineer} from Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}2/LG18. 4. 29. X7370 X7470 This is to confirm that you will fit up 21-EX car with the original W.W. leverage from the brake pedal to the servo i.e., lever F.76811 to be 1.375" long with the corresponding links. You will fit 45° cams in the servo. Hs{Lord Ernest Hives - Chair}/Ian | ||