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 3 1/2' x 5' six-cylinder petrol engine with high compression pistons.
| Identifier | ExFiles\Box 148\1\ scan0204 | |
| Date | 13th September 1939 | |
| 3 1/2" x 5" SIX CYLINDER PETROL ENGINE 1256 RD 830 ZENITH CARB. 36 WEI 2, 30 CH. 130 M.{Mr Moon / Mr Moore} 110 COMP. 145 E.C. 55 AIR. MANUAL CONTROL IGNITION. HIGH COMPRESSION PISTONS 6.75-1. PLUG BAR 29.85 PTS/B.H.P/HR. B.H.P. PTS/HR. TORQUE LBS. FT. DEGREES ADVANCE B.T.C. R.P.M. TORQUE DEGREES ADVANCE PTS/HR B.H.P PTS/B.H.P/HR RRNWEST SERD 13 SEPT./39 | ||