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 pressure curves and piston displacement against crank angle for a 40-50 engine.
| Identifier | WestWitteringFiles\L\2April1924-June1924\ Scan115 | |
| Date | 4th April 1928 guessed | |
| 40-50 ENGINE. W.W. EXH. SCHEME PRESS. SCALE 1" = 6.2 lbs/□" CYL NO 6. R.P.M. 2000. CUT OUT CLOSED. MAX PRESS. NEAR END OF EXH STR 10.85 lbs/□" INDICATED VOL EFFCY = 91% ATMOS LINE PISTON DISPLACEMENT FOR CRANK ANGLE 15 | ||