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 | ||
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).