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).
Issues with pre-war pistons, broken induction pipes, and piston ring claps, suggesting a trial of aluminium pistons.
| Identifier | ExFiles\Box 74\3\ scan0089 | |
| Date | 22th November 1923 | |
| To BY.{R.W. Bailey - Chief Engineer} from E.{Mr Elliott - Chief Engineer} c. to BJ. c. to Hs.{Lord Ernest Hives - Chair} X856 E2/M22.11.23. PREWAR PISTONS & PISTON RING CLAPS. X. 834 X. 858 X. 2748 X.1506 In reply to your memo. BY11/P14.11.23., have not been able to put before Mr. Royce yet the full case as stated by you regarding pre-war pistons, but I have ascertained that he is of the opinion that the speed of the engine is the cause of the broken induction pipes and not the temperature of the crankcase as explained by you. The speed of the engine owing to lower axle ratio and higher road speed due to great output has gone up. Furthermore we understand from Mr. Hives that he is not in agreement with you regarding gas leakage past aluminium pistons. In view of these facts we would suggest that suitable pistons be made in aluminium and tried on those cars where piston ring claps require urgent attention. We will let you know in due course what recommendation can be made as regards dealing with broken induction pipes on production cars. MADE AT CROXLEY E.{Mr Elliott - Chief Engineer} | ||