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).
Power curve comparison chart for B.V. and B.60 engine units.
| Identifier | ExFiles\Box 134\2\ scan0201 | |
| Date | 1st February 1939 guessed | |
| COMPARISON OF B.V. UNIT AND B.60 UNIT (POWER.) CURVE C ① BOTH UNITS WITH STD. B.V. SYSTEM 2-1 1/2 S.U. CARBS. B.60 - OPEN EXHAUST OPENED THROAT PD 292 AEROLITE PISTONS FLUSH WITH TOP OF BLOCK 6·4:1 COMPRESSION RATIO SODIUM FILLED EXHAUST VALVES VALVE TIMING .030 CLCE I.O. 8° PTDC E.O. 44° BB. } EB 4026 I.C. 28° PBDC E.C. 4° BTDC (1a) NON DETONATING POWER REDLINE (TEST BED EXHAUST) ② B.V. - OPEN EXHAUST - STD. WRAITH HEAD AEROLITE RAISED CROWN PISTON 170 - 6·5:1 RATIO STD. SOLID EXHAUST VALVES VALVE TIMING .030 CLCE I.O. 1° PTDC E.O. 46° BBDC } ECD.673 SHAFT I.C. 50° PBDC E.C. 7° PTDC (2a) NON DETONATING POWER REDLINE (TEST BED EXHAUST SYSTEM) BHP AND MEP R.P.M. IGN. ADV. BTDC | ||