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).
Graph comparing the power and fuel consumption of Discol and Ethyl fuels at various RPMs, including valve timing specifications.
| Identifier | ExFiles\Box 150\1\ scan0317 | |
| Date | 2nd February 1938 | |
| COMPARISON OF FUELS POWER & FUEL CONSUMPTION STD. AIR & EXHAUST SILENCERS FITTED INLET VALVE 1.6 DIA EXHAUST VALVE 1.4 DIA COMPRESSION RATIO 6.37 : 1 MIXTURE SET FOR WEAKEST MAINTAINED IGNITION SET FOR MAXIMUM POWER DISCOL - - - - - - - - ETHYL ________ B.H.P SPECIFIC FUEL CONS PTS / B.H.P / HR. R.P.M. VALVE TIMING I.O. 11° B.T.D.C. E.C. 9° A.T.D.C. I.C. 54° A.B.D.C. E.O. 48° B.B.D.C. B.M.E.P (LBS. SQ.") G.W. 2.2.38 | ||