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 plotting Brake Horsepower (BHP) and Brake Mean Effective Pressure (BMEP) against RPM for a Large Bore J III Unit 2.400 engine.
| Identifier | ExFiles\Box 106\5\ scan0085 | |
| Date | 20th March 1933 guessed | |
| LARGE BORE J III UNIT 2.400 RM{William Robotham - Chief Engineer} J XIV BHP BMEP 6-1 C/R SILENT TAPPETS OPEN EX. HEAD TO H.S. 908 TWO SEPARATE R.R. CARBS TO LEC 2924 1.050 CHOKES I.O. T.D.C E-O 44 B.T.C. I.C. 43 A.B.C E.C. 8 A.T.C. B.H.P B.M.E.P R.P.M | ||