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).
Engine cooling tests for a 40/50 HP engine, comparing the performance of six and three-bladed fans.
| Identifier | ExFiles\Box 75\3\ scan0121 | |
| Date | 8th July 1924 | |
| 8.7.24. REPORT ON COOLING WITH STANDARD 40/50 HP. AND THREE BLADED FAN. Tests carried out on 49-GB. Total weight of car with full tank and 2 up - 2 tons. 10 cwts. 2 qrs. Tests carried out on Swinscoe Hill with standING start - Total distance of each test, 2 miles. Water temperatures at commencement of each test :- Top water pipe 80°C. Bottom water pipe 73 - 76°C. TESTS MADE IN TOP GEAR - average speed 33.3 m.p.h. average air temp. 18°C. SIX BLADED FAN. Shutters open - av. highest temp: top 85°C. bottom 74.25°C. Shutters closed " " " top 88.7°C. bottom 77.6°C. THREE BLADED FAN. Shutters open - av. highest temp: top 88.8°C, bottom 77.3°C. Shutters closed - " " " top 90.8°C. bottom 79.4°C. ----------------- contd:- | ||