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).
Blueprint graph of Horse Power and Mean Effective Pressure curves for a 4-0/50 engine.
| Identifier | Morton\M7\ img075 | |
| Date | 1st May 1928 guessed | |
| M.E.P. & F GII ALL CURVES TAKEN WITH STANDARD EXHAUST SY 4-0/50. 26 CU. INS. DISPLACEMENT. ALL CURVES TAKEN WITH HORSE POWER M.E.P. (LBS PER []') H.P. 40/50 BENCH H.P. 40/50 DYNo 90 88 86 84 82 80 78 76 74 72 70 68 66 64 62 60 58 56 54 52 50 48 46 44 42 40 38 | ||