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).
Pistons and rings from Allen and Simmonds Ltd., recommending a test of their product to improve gas-tightness.
| Identifier | ExFiles\Box 35\2\ scan 244 | |
| Date | 5th November 1920 | |
| X2748 To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. Hsl/LG5.11.20. X.1105. RE PISTONS AND RINGS. X.2748. We attach hereto Booklet and blue print from Allen and Simmonds Ltd., of Reading on Pistons and Rings. Their representative called at the works and showed to us samples of pistons fitted with their special rings. He had sample piston which had been fitted to one of our cars with these rings. We believe their spring seal and stop rather resembles the scheme by you. They have offered to supply us with a set of pistons for test. We recommend that we allow them to do this. We feel that anything which can improve the gas-tightness of our pistons is desirable. Our tests go to prove that the leakage we get occurs at the stops. Hs.{Lord Ernest Hives - Chair} | ||