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).
Results of cooling system tests on a 32 Ex. Car at various stages of mileage.
| Identifier | ExFiles\Box 131\1\ scan0353 | |
| Date | 19th October 1937 guessed | |
| SHEET 1 RESULTS OF COOLING SYSTEM TESTS ON 32 EX. CAR AT COMMENCEMENT OF MILEAGE. CADILLAC TYPE 5 BLADE FAN. 0.9/1 RATIO TABLE 1 CONDITION OF TEST | TOP WATER TEMP °C. | ATMOSPHERIC TEMP °C | CRITICAL AIR TEMP (UNCORRECTED) | CRITICAL AIR CORRECTED TO 85°C BOTTOM WATER | CORRESPONDING FIGURE IF 1.0/1.0 RATIO USED FULL THROTTLE FULL SPEED STD. TOP GEAR | 80 | 16 | 36 | 33 | 35 FULL THROTTLE FULL SPEED OVER DRIVE GEAR | 78 | 16 | 38 | 35 | 37 (2) DURING MILEAGE CRITICAL AIR TEMP AT MAX SPEEDS, IN OVERDRIVE, WITH 1.0/1 RATIO FAN - 31°C (ACTUAL) (NOTE - AT THIS TIME A FILTER WAS INCORPORATED IN OUTLET FROM BOTTOM TANK - THIS WAS SUBSEQUENTLY FOUND TO BE CHOKED & WAS CLEARED) (3) AT FINISH OF MILEAGE. CADILLAC TYPE 5 BLADE FAN WITH 1.0/1 RATIO (NOTE - NO OIL TEMP REGULATOR FITTED) TABLE 2 CONDITION OF TESTS | TOP WATER TEMP - STEADY AFTER 4-6 LAPS | CYL HEAD TEMP - DITTO | OIL TEMP (RISING STEADILY)°C | ATMOSPHERIC TEMP | CRITICAL AIR (UNCORRECTED) | CRIT. AIR CORRECTED AS ABOVE | SPEED | REMARKS FULL SPEED FULL THROTTLE STD. TOP GEAR | 92.0 BEARING FAILED | 91.0 | 13.6 BEARING FAILED | 21 | 29.0 | 27.5 | LAP 85.7 ½MILE 89 | FAN BELT STRETCHED & WAS SLIPPING FULL SPEED FULL THROTTLE OVER DRIVE GEAR | 84.5 | 84.0 | 12.0 | 21 | 36.5 | 34.0 | LAP 88.8 ½MILE 923 | FAN BELT O.K. | ||