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 sketch of a mechanical assembly with design notes.
| Identifier | WestWitteringFiles\V\October1930-February1931\ Scan210 | |
| Date | 15th January 1931 guessed | |
| THIS CENTRE MUST BE CONCENTRIC CAN BE ROUND OR SQUARE IF SQUARE MUST BE RIVETED HENCE SCREW FROM BOTTOM 30° < 30 > ALTERNATE SCREWS ACCORDING TO UPPER PIN HAVING SQUARE OR ROUND ENDS | ||