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).
Performance graph showing B.HP, B.M.E.P., thermal efficiency, and fuel consumption against R.P.M., with a valve timing diagram.
| Identifier | ExFiles\Box 72\4\ scan0156 | |
| Date | 12th March 1924 guessed | |
| VALVE TIMING. E.C. I.O 5° I.C. 45° E.O 40° B.H.P. B.M.E.P. BRAKE THERMAL EFFCY. B.H.P. PTS/B.H.P./HR. R.P.M. B.M.E.P lbs/□'' THERMAL EFFCY % CONSUMPTION PTS/HP/HR | ||