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 sketches illustrating engine inlet and exhaust valve mechanisms.
| Identifier | ExFiles\Box 158\5\ scan0106 | |
| Date | 25th December 1940 | |
| INLET EXHAUST Very light Spring Springs holding Valve in suspension Reaford 40 Charles Rd Solihull 25 12 40 | ||