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 for the addition of oil throwing grooves to an operating bush for a 20HP starter.
| Identifier | ExFiles\Box 40\5\ Scan185 | |
| Date | 26th September 1927 | |
| Note!! IT IS MOST IMPORTANT THAT NO ROUGH EDGES ARE LEFT ON THESE GROOVES OR THE CORK WASHER WILL BE TORN TO PIECES SLOT TO TAPER FROM .010 AT BOTTOM TO .025 AT EDGE RAD. IMPORTANT 062 6 GROOVES EQUALLY SPACED OIL THROWING GROOVES TO BE ADDED TO OPERATING BUSH DS1134 20HP STARTER ROLLS ROYCE LIMITED 26 SEP 1927 DERBY | ||