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).
Trial of a modified 2nd motion shaft and 1st speed pinion to improve gearbox silence.
| Identifier | ExFiles\Box 99\4\ scan0170 | |
| Date | 9th January 1939 | |
| BI/NS.{Norman Scott} c. Rm.{William Robotham - Chief Engineer} 428 FJH{Fred J. Hardy - Chief Dev. Engineer} DA.{Bernard Day - Chassis Design}11/G.9.1.39. Ready 18/1/39 B.5. GEAR BOX. PD.348 shews a 2nd. motion shaft of increased diameter and incorporating a 17 tooth 1st. speed pinion. It is intended for trial on the question of silence of the 1st speed only. A detail is required. DA.{Bernard Day - Chassis Design} | ||