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 for a B60 4.25-litre engine with a 7.0:1 compression ratio.
| Identifier | ExFiles\Box 124\1\ scan0256 | |
| Date | 15th August 1939 guessed | |
| B60 POWER (4 1/4 LTRE - 7.0:1 COMP RATIO) CONDITIONS 2 - 1 1/2 SH CARBS. FLUSH TOP PISTONS OPEN EXHAUST VALVE TIMING .030 CLCE IO 0° PTDC EO 30° BBDC IC 47° PBDC EC 7° PTDC DIAGRAM LABELS: IN EX PLUG AXIS LABELS: RPM BHP. COMP. PRESS. MEP IGN. ADV. CURVE LABELS: Comp Press MEP BHP Ign Adv NOTE: ONLY NECESSARY TO LOSE 2lbs/sq.in MEP FROM MAX SILENCED POWER BY RETARDING TO CUT OUT DETONATIONS ON REDLINE NO3 FUEL. | ||