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 showing a cross-section of a mechanical component featuring a shaft, bearing, and various grooves.
| Identifier | WestWitteringFiles\Q\February1927-March1927\ 21 | |
| Date | 11th February 1927 guessed | |
| HORIZONTAL GROOVE IN SHAFT FOR SMALL BEARING ANNULAR GROOVE .030" PASSAGE | ||