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 of running long pistons to address piston knocks.
| Identifier | ExFiles\Box 35\2\ scan 130 | |
| 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} EH5/LG22.9.19. X.2748. RE PISTON KNOCKS. We have been running some long pistons of the present design. The results so far are very satisfactoyr. We are trying with various clearances and also with a number of similar [handwritten: annular] oil grooves on the fitting portion. EH. | ||