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 B.60 No3 engine with open exhaust, detailing power and BMEP curves against RPM.
| Identifier | ExFiles\Box 127\2\ scan0091 | |
| Date | 21th April 1939 guessed | |
| B.60 Nº3 OPEN EXHAUST COMP RATIO 6.45/1 VALVE TIMING .030 CLEARANCE I.O 59° A.T.D.C. I.C 44 1/2° A.B.D.C. E.O 37 1/2° B.B.T.D.C. E.C 15° A.T.D.C. LONG DURATION INLET CAM E.B. 4322 S/ZN RPM BMEP LBS/SQ" | ||