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 plotting a power comparison for the Phantom III engine, showing B.HP and M.E.P. against R.P.M.
| Identifier | ExFiles\Box 90a\6\ Scan231 | |
| Date | 29th April 1969 guessed | |
| PHANTOM III POWER COMPARISON SP{Mr Spinney} 39 A.{Mr Adams} TESTS RUN OPEN EXHAUST AND WITH STD. STROMBERG CARB. B.H.P. M.E.P. LBS □' R.P.M. RM{William Robotham - Chief Engineer} 38 AND 44 CAMS WITH NORMAL TAPPET SETTINGS .006 AND .008 TIMING .020 CL'CE I.O. 1° B.T.D.C. E.O. 40° B.B.D.C. I.C. 48° P.B.D.C. E.C. 6° B.T.D.C. | ||