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).
Effectiveness of salt-cooled exhaust valves in reducing temperature and lead attack.
| Identifier | ExFiles\Box 88\4\ scan0177 | |
| Date | 22th September 1936 | |
| FILES. X254 22nd September, 1936, Aero people agree in the main with attached curve. Their salt cooled exhaust valves still run above 700°C, drop from normal valves 50°-100°C, dependent upon stem dia. With normal valves in our car unit our maximum temperature range is 750°-850° ∴ salt cooling of valves would not reduce temperature sufficiently to obtain any improvement with regard to lead attack. Hs{Lord Ernest Hives - Chair}/Swdl.{Len H. Swindell} | ||