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).
Three graphs illustrating radiator temperature tests conducted on Cat and Fiddle Hill, analyzing overheating when climbing.
| Identifier | ExFiles\Box 38\2\ Scan247 | |
| Date | 16th September 1924 | |
| RADIATOR TESTS. CAT AND FIDDLE HILL. OVER-HEATING REDUCED BY CLIMBING ON INDIRECT GEARS. Y-AXIS: TEMPERATURE RADIATOR C° X-AXIS: DISTANCE CLIMBED MILES. Graph A: CONSTANT ROAD SPEED FAN SPEED VARIED TOP RADIATOR TEMPS. MEAN AIR TEMP 14°C. SPEED 25 M.P.H. Direct Drive FAN R.P.M. 1040 2ND SPEED FAN R.P.M. 2320 3RD SPEED FAN R.P.M. 1550 Graph B: CONSTANT ROAD SPEED. FAN SPEED VARIED. TOP RADIATOR TEMPS. MEAN AIR TEMPS 14°C. SPEED 20 M.P.H. 3RD SPEED. 2ND SPEED. Graph C: CONSTANT FAN SPEED. ROAD SPEED VARIED TOP RADIATOR TEMPS. MEAN AIR TEMP 13°C. FAN R.P.M. 1550 3RD SPEED 30 M.P.H. 2ND SPEED 20 M.P.H. 1ST SPEED 13 M.P.H. | ||