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).
Comparative diagram illustrating two designs of splined pinions.
| Identifier | ExFiles\Box 6\4\ 04-page137 | |
| Date | 22th May 1930 | |
| 1.1835 DIA +000 -002, 5875, 1.425 DIA, 1.365 DIA, SPLINES PRODUCED FROM EXISTING PINIONS (TORSIONALLY FREE) AND DO NOT COME OUT OF MESH., USED ON "SOLID" PINIONS WITH UNSATISFACTORY RESULTS, REF:-, FMM./, DATE:-, 22 MAY '30, DERBY. | ||