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 comparing cylinder head configurations for the B.60 No. 3 unit.
| Identifier | ExFiles\Box 134\1\ scan0170 | |
| Date | 26th May 1939 guessed | |
| B.60 CYL. HEAD COMPARISON S.101 . B.60 Nº3 UNIT CAMSHAFT E.B.4332 VALVE TIMING I.O. 9º A.T. E.O. 27º B.B. I.C. 49º A.B. E.C. 11º A.T. PISTONS: AEROLITE (FLUSH TOP) INDN. SYSTEM 2 - 1½" S.U.'S ON 1-6" PIPE. ① CYL. HEAD (E.B. 4706) SLOPING VALVE HEAD (SHORT COMB. CHAMBER) CR{Mr Cra???ster / Mr Chichester} = 6.9:1 ② AS ① NON-DETN. TEST BED EXH. SYSTEM. (REDLINE) ③ OPEN EXH. - B.H.P. B.H.P. & B.M.E.P. R.P.M. IGNITION ADVANCE. Ⓐ MIN. ADV. FOR MAX. POWER. Ⓑ NON-DETN. LINE. IGN. ADV. B.T.D.C. | ||