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).
Hand-drawn schematic of a gearbox design with annotations.
| Identifier | WestWitteringFiles\V\October1930-February1931\ Scan239 | |
| Date | 24th January 1931 guessed | |
| CONSTANT MESH 3RD SPEED GEARS 2ND SPEED WHEEL LOCKING FROM BACK OF BOX 3RD 2ND 1ST 1ST AND REVERSE DRIVERS ABOUT SAME DIAMETER 2ND DRIVER RATHER LARGER THAN REVERSE DRIVER SHAFT SUPPORT CAN BE CUT AWAY. SHAFT DOES NOT MOVE ENDWAYS. IF NOT STIFF ENOUGH IT CAN AT THIS END BE MADE CONTINUOUS BEAM SHEWN ALL GEARS OUT | ||