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 mechanism with annotations.
| Identifier | ExFiles\Box 104\4\ scan0002 | |
| Date | 25th January 1931 guessed | |
| CONSTANT MESH 3RD SPEED GEARS 2ND SPEEDWHEEL LOCKING FROM BACK OF BOX 1ST 2ND 3RD 1ST AND REVERSE DRIVERS ABOUT SAME DIAMETER 2ND DRIVER RATHER LARGER THAN REVERSE DRIVER SHEWN ALL GEARS OUT SHAFT SUPPORT CAN BE CUT AWAY SHAFT DOES NOT MOVE ENDWAYS IF NOT STIFF ENOUGH IT CAN AT THIS END BE MADE CONTINUOUS BEAM. | ||