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 heat dissipation and the influence of outside air temperature.
| Identifier | ExFiles\Box 38\2\ Scan228 | |
| Date | 11th September 1924 | |
| R.R. 493A (40 H) (SL 42 12-7-28). J.H., D.{John DeLooze - Company Secretary} -5- EXPERIMENTAL REPORT. Expl. No. REF: Hs{Lord Ernest Hives - Chair}/ACL/LG11.9.24. greater than when on full load. The above is only given as an example and is intended to show the tendency which the radiator will possess to deal with the heat given to the water when the car is driven on a lower gear and at sufficiently reduced throttle openings. It really revolves itself into a question of reducing the heat flow to a minimum by running on as small a throttle opening as possible on a low gear and keeping the fan speed as high as possible, hence the xxxxxxxx necessity of taking precautions to insure against slip of the fan belt. Although no account has been taken of air flow induced through the radiator core by virtue of the speed of the car the tendency should remain the same as above even when assistance is gained in this direction. After all, it is at the lower speeds that we are chiefly concerned when the air speed is low and its effects less marked. Influence of the outside air temperature. As would be imagined the outside air temperature has a direct influence on the average temperature which the rad- iator will attain for a certain amount of heat flow. It is the top water temperature with which we are chiefly concerned and we have estimated that for a given rise in the temperature of the atmosphere we should expect practically the same rise in temperature of the top water for the same conditions, the assumptions being that the rate of heat dissipation of the radiator is proportional to the temp. difference between the contd :- | ||