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 illustrating the effect of water circulation on engine overheating under various conditions.
| Identifier | ExFiles\Box 12\7\ 07-page104 | |
| Date | 2nd July 1930 guessed | |
| GRAPH II EFFECT OF CIRCULATION ON OVERHEATING 19 EX. CAR 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 CIRCULATION ON PII WATER SYSTEM RAD E.79448 6 7/8 TUBES MEAN BOTTOM WATER TEMP. 67°C Graph A: TOP WATER TEMP. C° 50, 60, 70, 80, 90 ROAD SPEED 75 M.P.H. SHUTTERS OPEN. STANDARD RESTRICTED CIRCULATION. SHUTTERS CLOSED. STANDARD RESTRICTED CIRCULATION. Graph B: FLOW GAL/MIN 10, 20, 30, 40, 50 B RAD E.79321 TWO RAD. OUTLETS SINGLE RAD. OUTLETS ENGINE R.P.M. 500, 1000, 1500, 2000, 2500, 3000 65 M.P.H. RESTRICTION OF 23 .125 HOLES IN OUTLET PIPE Graph C: CIRCULATION GAL/MIN: 35, 40, 45 C BOTTOM WATER TEMP. C° 50, 60, 70, 80, 90 ENGINE R.P.M. 2500 Single Rad. Outlet Double Rad. Outlet CIRCULATION ON PII WATER SYSTEM AT HIGH TEMPERATURES. Radiator Diagram: 4.0" 6 M/M 7.5 M/M TUBES 23.6" 26.8" DOUBLE RADIATOR OUTLET | ||