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).
The fitting of 35° ball bearing cams to the 25 HP servo.
| Identifier | ExFiles\Box 105\4\ scan0078 | |
| Date | 6th October 1931 | |
| RHC.{R. H. Coverley - Production Engineer} from Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} x5370 Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}7/AD6.10.31. BALL BEARING CAMS ON THE 25 HP. SERVO. We wish to increase the efficiency of the 25 HP. servo. The 45° ball bearing cams run on the last 10,000 mile test proved very satisfactory for consistency and we should therefore like to fit a set having the 35° angle to 18-GIV before it goes to France. The 35° angle is measured in the same way as the cam at present used as standard on the right-hand 40/50 car. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||