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 valve design to 45° angle seats and to send samples for review.
| Identifier | WestWitteringFiles\K\September1923\ Scan3 | |
| Date | 1st September 1923 | |
| contd:- -3- Hsl/LCL.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 head valves to W.W. Hm.{Capt. W. Hallam - Head Repairs} | ||