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 19 EX car.
| Identifier | ExFiles\Box 19\4\ Scan126 | |
| Date | 2nd July 1930 guessed | |
| GRAPH II EFFECT OF CIRCULATION ON OVERHEATING. 19 EX CAR GRAPH 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. STANDARD RESTRICTED CIRCULATION. Y-AXIS: TOP WATER TEMP. C° X-AXIS: ROAD SPEED 75 M.P.H. 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. Y-AXIS: FLOW GAL/MIN. X-AXIS: ENGINE R.P.M. GRAPH C: CIRCULATION ON PII WATER SYSTEM AT HIGH TEMPERATURES. DOUBLE RAD: OUTLET SINGLE RAD: OUTLET ENGINE R.P.M. 2500 Y-AXIS: CIRCULATION GAL/MIN. X-AXIS: BOTTOM WATER TEMP. C° DIAGRAMS: 6 M/M 7.5 M/M TUBES 4.0" 23.6" 26.8" DOUBLE RADIATOR OUTLET. | ||