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 different cylinder head and exhaust system configurations for a B.60 No.3 unit.
| Identifier | ExFiles\Box 132\4\ scan0230 | |
| Date | 25th October 1939 guessed | |
| B.60. CYL. HEAD COMPARISON S.102 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 - 1 1/2" S.U's ON 1'6" PIPE. ① CYL HEAD (E.B. 3844) STD. HEAD WITH THROAT INCREASED TO MAX. BY MACHINING FACE MOD TO P.D. 292 GIVING 6.8:1 C/R.{Sir Henry Royce} ② AS ① NON DETN. TEST BED EXH. SYSTEM. (REDLINE) ③ OPEN EXH - B.H.P. IGNITION ADVANCE Ⓐ MIN. ADV. FOR MAX POWER. Ⓑ NON-DETN. LINE. AXIS LABELS: Left Y-Axis: B.H.P. & B.M.E.P. Bottom X-Axis: R.P.M. Right Y-Axis: IGN. ADV. B.T.D.C. | ||