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).
Series of graphs showing the effect of water circulation on overheating in a PII water system.
| Identifier | ExFiles\Box 64\1\ scan0092 | |
| Date | 2nd July 1930 guessed | |
| GRAPH II EFFECT OF CIRCULATION ON OVERHEATING 19 E.X. CAR CHART A: A BACK PRESS. CAUSED BY RESTRICTION 15 LBS/SQ' WATER OUTLET FROM THE CYL: BLOCK RESTRICTED TO 23-.125 HOLES. TOP WATER TEMP. ATS TEMP. 20°C SHUTTERS OPEN. SHUTTERS CLOSED STANDARD RESTRICTED CIRCULATION. TOP WATER TEMP. C° ROAD SPEED 75 M.P.H. BOTTOM LEFT DIAGRAMS: 6 M/M 7.5 M/M TUBES 4.0" 23.6" 26.8" DOUBLE RADIATOR OUTLET. GRAPH B: CIRCULATION ON PII WATER SYSTEM. RAD: E.79448 6/7 1/2 TUBES. MEAN BOTTOM WATER TEMP. 67°C RAD. E.79321 TWO RAD OUTLETS. SINGLE RAD OUTLETS. RESTRICTION OF 23 .125 HOLES IN OUTLET PIPE. 65 M.P.H. FLOW GAL/MIN ENGINE R.P.M. GRAPH C: CIRCULATION ON PII WATER SYSTEM AT HIGH TEMPERATURES. CIRCULATION GAL/MIN ENGINE R.P.M. 2500 BOTTOM WATER TEMP. C° DOUBLE RAD: OUTLET SINGLE RAD: OUTLET | ||