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 comparing engine BHP and B.M.E.P. at different RPMs for various compression ratios.
| Identifier | WestWitteringFiles\N\July1925-September1925\ Scan169 | |
| Date | 6th July 1925 guessed | |
| B.H.P. B.M.E.P. R.P.M. CURVE No VII COMPRESSED RATIO COMPARISON CURVES. E COMPRESSION RATIO 5.27/1 F COMPRESSION RATIO 6.09/1 G COMPRESSION RATIO 6.28/1 EAGLE IX CAMSHAFTS INLET VALVE TIMING I.O. T.D.C. 14° I.C. 54° EAGLE VIII CARBS CORRECTED FOR BAR: & TEMP: | ||