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 for a B.60 cylinder head.
| Identifier | ExFiles\Box 134\1\ scan0169 | |
| Date | 26th May 1939 guessed | |
| B.60 CYLINDER HEAD COMPARISON. S.100 B.60 N° 3 UNIT. CAMSHAFT: E.B.4332 VALVE TIMING. I.O. 9° A.T. E.O. 27° B.B. I.C. 49° A.B. E.C. 11° A.T. PISTONS: AEROLITE (FLUSH TOP) INDN. SYSTEM 2 - 1½" S.U.'S ON 1-6 PIPE. ① CYL HEAD EXs 1384/1758/1869 (.100 OFF FACE) CAP = 111 CCS. C/R = 7.1 ② As ① NON-DETN. TEST BED EXH. SYSTEM. ③ OPEN EXH - B.H.P. ④ NON-DETN. POWER ON CYL. HEAD E.B. 3844. ⑤ NON-DETN. POWER ON CYL. HEAD E.B. 4706. B.H.P. & B.M.E.P. IGNITION ADVANCE CYL. HEAD EXs 1384 Ⓐ MIN. ADV. FOR MAX. POWER. Ⓑ NON-DETN. LINE. IGN. ADV. B.T.D.C. R.P.M. | ||