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).
Notification regarding a modification to ball bearings on gearbox operating forks.
| Identifier | ExFiles\Box 99\4\ scan0173 | |
| Date | 10th January 1939 | |
| DY{F R Danby}/MS c. Rm.{William Robotham - Chief Engineer} 428 DA.{Bernard Day - Chassis Design}14/G.10.1.39. FJH{Fred J. Hardy - Chief Dev. Engineer} B.V. GEARBOX. AH Please receive herewith PD.352 shewing a modification to the ball bearings on the gear operating forks to reduce the digging in that has been experienced. The increase in number of calls is from 16 to 40. Please instruct experimentally. DA.{Bernard Day - Chassis Design} | ||