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).
Fin and tube radiators, a cooling test procedure, and the performance of aluminium versus pressed steel pulleys.
| Identifier | ExFiles\Box 126\2\ scan0122 | |
| Date | 16th June 1939 | |
| -3- RM{William Robotham - Chief Engineer}/Ed.{J. L. Edwards}8/JH.16.6.39. Radiators are of the fin and tube type made by Morris, and are stated to be trouble free and efficient. For a cooling test, the cars are taken to Bwlch-y-Groes, driven up the hill in the highest possible gear, full-throttle, (average speed about 30 m.p.h.) and provided the difference in mean water temperature and air temperature does not exceed 60°C. the car is considered satisfactory. This is equivalent to a critical air of approximately 40°C. assuming temperatures to have steadied up during the climb - rather a doubtful assumption. Pulleys. A brief mention of pulleys was made, the general conclusions reached being :- (a) Alum pulleys are thoroughly unsatisfactory, wearing far too quickly. (b) Pressed steel pulleys give no trouble provided they are tool made and accurate. RM{William Robotham - Chief Engineer}/Ed.{J. L. Edwards} | ||