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).
Modifications to the 20/25 servo to fit the J. 4. Gearbox, referencing scheme 3315.
| Identifier | WestWitteringFiles\V\March1931-September1931\ Scan325 | |
| Date | 21th July 1931 | |
| ORIGINAL. BX. FROM DA.{Bernard Day - Chassis Design} C. to S2. HS.{Lord Ernest Hives - Chair} J.{Mr Johnson W.M.} 4. GEARBOX. DA{Bernard Day - Chassis Design}4/M21.7.31. X5310 (W)ver 2 3/31 Herewith we send N. scheme 3315., giving particulars of the slight modifications necessary to the 20/25. servo to fit to that box. DA.{Bernard Day - Chassis Design} | ||