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).
Blueprint of a splined shaft component with dimensional annotations.
| Identifier | ExFiles\Box 179\3\ img115 | |
| Date | 31th January 1932 guessed | |
| 3.850 .225" 30° DIA 1.3775" 6 SPLINES 1.337" DIA. x 1.101" DIA .275" WIDE DIMENSIONS TAKEN FROM THIS FACE RAD. 1.000" | ||