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).
Instruction to modify the servo cam angle from 35° to 30° on experimental cars with front hydraulic brakes.
| Identifier | ExFiles\Box 152\2\ scan0255 | |
| Date | 15th April 1939 | |
| 1294 BY/NS.{Norman Scott} [struck through] c. Rm.{William Robotham - Chief Engineer} DA.{Bernard Day - Chassis Design}9/G.15.4.39. B.V. and B.50 SERVO. Experimental Department ask that because VG.90 is the preferred lining for the servo, the servo cams on experimental cars should in future be instructed with 30° angle instead of 35°, and this modification should be retrospective on experimental chassis fitted with front hydraulic brakes. DA.{Bernard Day - Chassis Design} | ||