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).
Results of cooling system investigations and recommendations for managing overheating.
| Identifier | ExFiles\Box 24\4\ Scan324 | |
| Date | 10th December 1924 | |
| To R.{Sir Henry Royce} from Hs.{Lord Ernest Hives - Chair} c. to CJ. BJ. c. to E.{Mr Elliott - Chief Engineer} BY.{R.W. Bailey - Chief Engineer} c. to Wor.{Arthur Wormald - General Works Manager} 4766 Hs{Lord Ernest Hives - Chair}1/LG10.12.24. COOLING INVESTIGATIONS+ 48250 Attached herewith is a memo. from BJ. We consider this is a matter you would like to decide. Our recommendations are as follows :- 1. Complaints of over-heating at high speeds should always be improved by increased ventilation. 2. Complaints of over-heating at low speeds can also be improved with increased ventilation and also with a larger radiator. There are a large number of cars on the road which we can increase the matrix by lowering the bottom tank. This would not interfere with the bonnet and scuttle. The results of our tests have shewn that we cannot produce any magic cures for preventing the water boiling. We do not think we shall ever make a car in which the water will not boil in hot weather. We think that 'W' series (EAC.11) will be a substantial improvement. EAC.V. series should be no worse - we anticipate it will be slightly better than the present 40/50 HP. We should try and convince customers that the fact of the car boiling is not serious. It can safely be recommended that there is no need to stop and replace the water until the car has been boiling continuously for more than 20 minutes. We believe it is a practice with some customers, when the car is boiling on a hill, to stop the engine at intervals to let it cool down. This is not to be recommended because contd :- | ||