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).
Graph showing piston displacement for crank angles related to a 40-50 engine exhaust scheme.
| Identifier | WestWitteringFiles\L\2April1924-June1924\ Scan116 | |
| Date | 4th April 1928 guessed | |
| 40-50 ENGINE. W.W. EXHAUST SCHEME. PRESS SCALE 1" = 6.2 lbs/□" CYL NO 6. R.P.M. 2000. CUT-OUT OPEN. MAX PRESS NEAR END OF EXH STROKE = 7.6 lbs/□" INDICATED VOL. EFFCY. = 88% ATMOS LINE PISTON DISPLACEMENT FOR CRANK ANGLES 4 | ||