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 between different Phantom and Vulture engine configurations.
| Identifier | ExFiles\Box 123\3\ scan0075 | |
| Date | 13th December 1933 guessed | |
| COMPARISON OF 8.1 LITRE PHANTOM 6-1 C/R LARGE CARB. LE C 3432 AND 7.6 LITRE PHANTOM 5.25 C/R STANDARD SEMI-EXPANDING CARBURETTER I.E. MY. CHASSIS UNITS COMPARED WITH VULTURE UNIT ALL TESTS 114° CAMSHAFT (E.82448) OPEN EXHAUST. Graph Labels: VULTURE ENGINE MY. CHASSIS ENGINE Axes: Left Y-axis (B.H.P.): 200, 190, 180, 170, 160, 150, 140, 130, 120 Right Y-axis (M.E.P. LBS / □"): 120, 110, 100, 90, 80 X-axis (R.P.M.): 500, 1000, 1500, 2000, 2500, 3000, 3500 | ||