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 circulation on overheating in a PII water system.
| Identifier | ExFiles\Box 29\3\ Scan231 | |
| Date | 2nd July 1930 guessed | |
| GRAPH II EFFECT OF CIRCULATION ON OVERHEATING CHART A: 19 EX CAR A BACK PRESS CAUSED BY RESTRICTION 15 LBS/□" WATER OUTLET FROM THE CYL: BLOCK RESTRICTED TO 23-.125 HOLES. TOP WATER TEMP ATS TEMP 20°C Y-Axis: TOP WATER TEMP C° Bars (SHUTTERS OPEN.): STANDARD, RESTRICTED CIRCULATION. Bars (SHUTTERS CLOSED): STANDARD, RESTRICTED CIRCULATION. ROAD SPEED 75 M.P.H. GRAPH B: CIRCULATION ON PII WATER SYSTEM RAD: E79448 6/7 1/2 TUBES. MEAN BOTTOM WATER TEMP 67°C RAD: E79321 Y-Axis: FLOW GAL/MIN X-Axis: ENGINE R.P.M. Line Data: TWO RAD OUTLETS, SINGLE RAD OUTLETS, RESTRICTION OF 23 .125 HOLES IN OUTLET PIPE. Test Condition: 65 M.P.H. GRAPH C: CIRCULATION ON PII WATER SYSTEM AT HIGH TEMPERATURES. Y-Axis: CIRCULATION GAL/MIN X-Axis: BOTTOM WATER TEMP C° Test Condition: ENGINE R.P.M. 2500 Line Data: DOUBLE RAD OUTLET, SINGLE RAD OUTLET. DIAGRAMS: DOUBLE RADIATOR OUTLET Radiator core dimensions: 4.0, 6 M/M, 7.5 M/M TUBES, 23.6, 26.8. | ||