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).
Requesting instructions for the J.3. Gearbox to use the same specifications as the standard 20/25 model.
| Identifier | ExFiles\Box 123\3\ scan0147 | |
| Date | 7th March 1934 | |
| To SY. from MDY. C. WGB. B. Ms. Ds. WHO. GRX x4704 HDY.{William Hardy}2/HP.7.3.34. J.3. Gearbox. In order to enable this box to be run at an early date with all of the gears ground, will you kindly instruct constant mesh gears of the same ratio and tooth particulars as for the standard 20/25. MDY. | ||