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).
Testing and feedback on a 40/50 HP engine fitted with cylinders for completely enclosed valves.
| Identifier | ExFiles\Box 35\3\ scan 062 | |
| Date | 1st November 1924 | |
| To BJ. from Hs.{Lord Ernest Hives - Chair} X2764 Hs{Lord Ernest Hives - Chair}2/LG3.11.24. 40/50 HP. ENGINE WITH ENCLOSED VALVES. X.2764 X2565 We have run a 40/50 HP. engine fitted with cylinders which enable the valves to be completely enclosed. We took the car fitted with these cylinders to WW. on our last visit. R.{Sir Henry Royce} did not comment upon the cylinders except that, as we should not now be ordering any further material for the 40/50 HP. engine, they would not be much use to us. The engine with the enclosed valves was shewn to PN.{Mr Northey} when we were at Gerrards Cross. We propose continuing tests with these cyls. in case it happens that further standard 40/50 HP. material is ordered. Hs.{Lord Ernest Hives - Chair} | ||