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).
Summary of radiator suitability tests on a Phantom III Continental car at Brooklands.
| Identifier | ExFiles\Box 92\6\ scan0211 | |
| Date | 6th September 1937 guessed | |
| SUMMARY OF RESULTS OF RADIATOR SUITABILITY TESTS CARRIED OUT ON 39 Ex (PH. III CONTINENTAL CAR) AT BROOKLANDS 6TH & 7TH AUGUST 1937 | CONDITION OF TEST | TOP WATER TEMP.°C | BOTTOM WATER TEMP.°C | TEMP. RISE °C | PRESS. IN LBS/SQ.IN. SYSTEM | TEMP AT REAR CYL: HEAD(DASH) | TEMP. UNDER BONNET NEAR DASH | ATMOSPHERIC TEMP. °C | CRITICAL AIR TEMP | |---|---|---|---|---|---|---|---|---| | **MAX SPEED** | | | | | | | | | | ① STD: TOP GEAR TEST MADE FOR MINIMUM NECESSARY DISTANCE - FAN BELT TIGHT. | 101.0 | 88.5 | 12.5 | 10.75 | ABOVE 102 | 54 | 31 | 30 | | **FULL THROTTLE** | | | | | | | | | | ② STD: TOP GEAR - TEST MADE OVER 6 LAPS - FAN BELT STRETCHED. | 99.5 | 85.5 | 14.0 | 6.25 | ABOVE 104 APPROX. | 52 | 27 | 27.5 | | ③ OVERDRIVE - TEST MADE OVER 4 LAPS - FAN BELT TIGHT | 90.0 | 76.7 | 13.3 | 2.00 | 96 | 47.5 | 25.5 | 35.5 | | IDLING WITH CAR STATIONARY APPROX: 280 R.P.M. TEMPS: STEADY AFTER 45 MINS. | 97.0 | 93.0 | 4.0 | - | ABOVE 101 | 67.0 | 23.5 | 32.5 | NOTE:- CAR FITTED WITH LOUVRED BONNET, 5 BLADE CADILLAC FAN, 1/1 RATIO FAN DRIVE CRITICAL AIR FIGURE GIVEN TO 100°C ASSUMING NO PRESSURE. BEST SPEEDS OBTAINED | | LAP | ½ MILE. | |---:|:---|:---| | ① STD: TOP | 1.52 = 88.94 | 19.4 = 92.78 | | ② OVERDRIVE | 1.52 = 88.94 | 19.4 = 92.78 | | ||