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).
Graphs comparing cylinder temperatures under 'take-off' conditions for different cooling systems and spark plugs.
| Identifier | ExFiles\Box 179\3\ img059 | |
| Date | 1st March 1932 guessed | |
| CYL. TEMPS UNDER "TAKE OFF" CONDITIONS INCREASE OF TEMP WITH TIME NO. 3 CURVE ① WATER COOLED CURVE ② EVAPORATIVE COOLED BUT LODGE X 170 PLUGS CURVE ③ EVAPORATIVE COOLED Graph 1: WATER COOLED TAKE OFF CONDITIONS ① 1850 R.P.M. +1.8 LBS/D" BOOST LODGE A2 PLUGS D.T.D. 134 FUEL DETONATION Y. 10' TEMP °C TIME - MINS INLET & EXH. COUPLES N°3 CYL INLET N°4 CYL INLET WATER OUTLET WATER Graph 2: EVAPORATIVE COOLED TAKE OFF CONDITIONS ② 1850 R.P.M. +1.8 LBS/D" BOOST LODGE X 170 PLUGS D.T.D. 134 FUEL DETONATION Y. 30' TEMP °C TIME MINS INLET COUPLE N°3 CYL INLET N°4 CYL Exh. No.3 CYL OUTLET STEAM & WATER INLET WATER Graph 3: EVAPORATIVE COOLED. TAKE OFF CONDITIONS ③ 1850 R.P.M. +1.8 LBS/D" BOOST LODGE A2 PLUGS. D.T.D. 134 FUEL TEMP °C MINS INLET COUPLE No.3 CYL Exh. N°3 CYL & IN. N°4 CYL OUTLET STEAM & WATER INLET WATER Side Note: THIS CURVE SHOWS HOW TEMPS WERE REDUCED BY USING LODGE X 170 PLUGS INSTEAD OF LODGE A.2'S. | ||