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).
Satisfactory results from testing long pistons to address piston knocks.
| Identifier | WestWitteringFiles\C\September1919\ Scan19 | |
| Date | 22th September 1919 | |
| To R.{Sir Henry Royce} from EH. c. to CJ. c. to BN.{W.O. Bentley / Mr Barrington} c. to E.{Mr Elliott - Chief Engineer} c. to Da.{Bernard Day - Chassis Design} ORIGINAL EH5/LG22.9.19. 2 RE PISTON KNOCKS. X.2448 We have been running some long pistons of the present design. The results so far are very satisfactory. We are trying with various clearances and also with a number of annular oil grooves on the fitting portion. EH. R.R. 235 B. (200) (S.F. 874. 22-5-19. CL. 2376) | ||