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 comparison graph of two camshaft configurations (Eagle VIII and Eagle IX) plotting B.HP and B.M.E.P. against engine R.P.M.
| Identifier | ExFiles\Box 43\1\ Scan098 | |
| Date | 28th August 1925 guessed | |
| B.H.P. B.M.E.P. R.P.M. CURVE N° II CAMSHAFT. COMPARISON CURVES. COMPRESSION RATIO 5·27/1 A.{Mr Adams} EAGLE VIII CAMSHAFTS. INLET VALVE TIMING. B. EAGLE IX CAMSHAFTS. INLET VALVE TIMING. EAGLE IX CARBS. CORRECTED FOR BAR. & TEMP. T.O.C I.O 10° I.C 54° T.O.C I.O 14° I.C 54° | ||