Modifications to the J.4 gearbox servo for the 20/25 model.
| Identifier | ExFiles\Box 104\4\ scan0040 | |
| Date | 21th July 1931 | |
| X5310 By. {R.W. Bailey - Chief Engineer} from Da. {Bernard Day - Chassis Design} c. Sg. {Arthur F. Sidgreaves - MD} Hs. {Lord Ernest Hives - Chair} Da {Bernard Day - Chassis Design} 4/M21.7.31. J.4 GEARBOX. X.5310 Herewith we send N.sch. 3315 giving particulars of the slight modifications necessary to the 20/25. servo to fit to that box. Da. {Bernard Day - Chassis Design} | ||
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).