Performance comparison graph for the Vulture and 8.1 Litre Phantom engines, showing BHP and MEP against RPM.
| Identifier | ExFiles\Box 123\3\ scan0103 | |
| Date | 12th January 1934 | |
| 8.1 LITRE VULTURE(Experimental 6 CYL OHV LONG STROKE / Aero Engine) UNIT (NO.1) (OPEN EXHAUST) COMPARISON BETWEEN VULTURE(Experimental 6 CYL OHV LONG STROKE / Aero Engine) & 8.1 LITRE PHANTOM UNIT BOTH UNITS WITH 6:1 COMP RATIO - LARGE INLET VALVES THROAT BOTH UNITS WITH 6:1 SEMI EXP'd'G CARB (LEC 3432) (NO INTAKE SILENCER) A - VULTURE(Experimental 6 CYL OHV LONG STROKE / Aero Engine). ALUM CYL BLOCKS & LINERS. AUTO TAPPETS NO GEAR BOX ROLLER CAM FOLLOWERS TIMING .020 CLCE IO 2° BTDC EO 54.4° BBDC IC 50° PBDC EC 4° PTDC B PHANTOM 8.1 LITRE CAST IRON BLOCKS - GEAR BOX PAD CAM FOLLOWERS TIMING .020 CLCE IO 6° BTDC EO 58° BBDC IC 48° PBDC EC TDC AXIS LABELS: B.H.P. MEP (lbs/□) R.P.M. | ||
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).