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).
The disadvantages of a cooling system and the principles of evaporative cooling.
| Identifier | ExFiles\Box 178\1\ img039 | |
| Date | 15th February 1926 guessed | |
| - 23 - "Increasing the efficiency of the system" is rather a bad expression to use in this connection because actually its cooling efficiency remains unchanged. What is actually done is to "decrease the liability to boil", which is after all, the source of complaint, and therefore decreasing the liability to boil is increasing the efficiency of the system from the practical point of view. (iii) Disadvantages. In reviewing the disadvantages of this method of obtaining a reduction in liability to boil, it must be remembered that these disadvantages will only be operative during the short periods when the car would normally be over-heating. For the remainder of the time the cooling system will function in a perfectly normal manner, this is one of the assets of the scheme. While the system is actually under pressure there will be:- (a) Increased liability to detonation. (b) Increased liability to water leaks. The first is rather important because if the car starts to detonate when climbing a long hill under full torque, the heat imparted to the cooling water by the engine may increase and with it the tendency of the car to over-heat. (6) EVAPORATIVE COOLING. (i) Principles. Evaporative cooling can be carried out with an absolutely standard conventional water cooling system with slight alterations to the connections and the substitution of a gear type water contd. | ||