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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)
  
  


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