Modifications to Phantom piston rings to increase cylinder wall pressure.
| Identifier | ExFiles\Box 15\3\ Scan016 | |
| Date | 23th July 1928 | |
| Hs. {Lord Ernest Hives - Chair} from R. {Sir Henry Royce} c. to BJ. Hs. {Lord Ernest Hives - Chair} X.7040 R2/M23.7.28. PHANTOM PISTON RINGS. X.741 We want to get more pressure on the cyl. walls by deeper rings, with wider gap. Get some to give an increase of 50% by being .025 deeper and 10% more gap. The max. stress of the ring will be greater. I suggest say about .160 deep, and running deflection at gap .6. I think there is much in wall pressure per unit area. R. {Sir Henry Royce} | ||
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).