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).
Investigation into piston knocks finding excessive clearance in two condemned engines.
| Identifier | ExFiles\Box 48\1\ Scan111 | |
| Date | 22th October 1919 | |
| X4190 En. from EP.{G. Eric Platford - Chief Quality Engineer} c. to EH. EP{G. Eric Platford - Chief Quality Engineer}9/F22.10.19. RE. PISTON KNOCKS. With reference to the two cars, the engines of which were condemned for piston knocks on the 20th. inst., on dismantling, I find that the pistons which are knocking have more than the present maximum limit of clearance. I have yet, therefore, to find a "case". EP.{G. Eric Platford - Chief Quality Engineer} [Signature] | ||