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 showing the power output of a 3.5 Litre Bentley engine under various configurations.
| Identifier | ExFiles\Box 90a\2\ Scan151 | |
| Date | 21th July 1934 | |
| 3½ LITRE BENTLEY POWER OUTPUT CHASSIS No 35.A.E (E.R.HALL) PLUGS. K.L.G. 827 ① UNIT No XSBC STD. PRODUCTION ENG. No ② UNIT No 3.11 (SPEC: RHC{R. H. Coverley - Production Engineer}/NSC4/EP.{G. Eric Platford - Chief Quality Engineer}23-7-34) COMP. RATIO 7.75:1. (E3/237) 9¼ H.{Arthur M. Hanbury - Head Complaints} VALVE EX. 2089. (5/16" DIA) EX " E3/325 (1.200") "AEROLITE" PISTONS. OPEN EXHAUST ③ AS ② WITH SPECIAL EXHAUST SYSTEM COMPLETE & STD. AIR INTAKE & SILENCER COMPLETE. ④ AIR INTAKE & SILENCER REMOVED. ⑤ AS ② WITH STD. EXHAUST SYSTEM COMPLETE (C.O. CLOSED) AIR INTAKE & SILENCER REMOVED. NOTE: ALL TESTS WITH STD. CAMSHAFT EB.1085 (1.139") FUEL { 50% SHELL No1 50% BENZOL } OIL: CASTROL AERO 'C' HEAVY. GRAPH AXES: LEFT: B.H.P BOTTOM: R.P.M. RIGHT: B.M.E.P DIAGRAMS: ①: T.D.C., 1°, 11¼°, 46°, B.D.C., 55½° ②: T.D.C., 3:6+, 11¼°, 55°, 60°, B.D.C., 51°, C.T.S. | ||