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).
Radiator efficiency, comparing airflow at slow speeds for lorries versus higher speeds for cars on mountain passes.
| Identifier | ExFiles\Box 24\5\ Scan087 | |
| Date | 18th June 1925 guessed | |
| contd :- -2- because in climbing mountain passes the lorries would be travelling at a very slow speed - 3 or 4 m.p.h. With a car however, travelling 20 to 30 m.p.h., the speed of the car would force the air through the radiator at all points. A large number of tests have been made with the object of proving whether the whole of the radiator matrix is used efficiently - our tests show that it is. H.S. | ||