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).
Recommendation to modify the current valve design to 45° angle seats and send samples.
| Identifier | ExFiles\Box 48\4\ Scan109 | |
| Date | 1st September 1923 | |
| contd:- -3- Hs{Lord Ernest Hives - Chair}1/LG1.9.23. Our recommendation is that we continue to use the present design of Valve modified to 45° angle seats. Scheme of proposed modification attached. We are sending a sample of umbrella and flat headvalves to WW. Hs.{Lord Ernest Hives - Chair} | ||