On piston ring knocks in pre-war engines, recommending new pistons be made of aluminium, not cast-iron.
| Identifier | ExFiles\Box 48\1\ Scan158 | |
| Date | 26th November 1923 | |
| W/S. {Derby Works / Sales} H. {Arthur M. Hanbury - Head Complaints} from Hs. {Lord Ernest Hives - Chair} X4190 Hs {Lord Ernest Hives - Chair} 3/LG26.11.23. PISTON RING KNOCKS ON PRE-WAR ENGINES. R. {Sir Henry Royce} is quite in agreement to using the narrow rings as we are using on the present std. pistons but as new pistons will have to be made to suit these rings, these should be made of aluminium and not cast-iron. Hs. {Lord Ernest Hives - Chair} | ||
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).