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).
Report discussing engine cooling issues and potential modifications for different car models.
| Identifier | WestWitteringFiles\K\September1923\ Scan103 | |
| Date | 14th September 1923 guessed | |
| (2) This third item is less effective than the two preceding ones and probably it will be found to have a very little effect on the temperature of the air within the scuttle. This will be tested out. (4) The fourth item is also of very doubtful possi- bility. It consists of reducing the temperature of the air in summer under the bonnet. (The thermostat with a bye-pass which fitted to the present English cars is a good item.) It is however possible that we could do something in the way of reducing the temperature by lag- ging the exhaust pipes, by increasing the size of the rad- iator, by making the radiator somewhat shallower, and so increasing the quantity of air through the radiator by using rather larger tubes to increase the air through the radiator, by increasing the size of the fan, and by giv- ing extra facility for the air to escape. In conclusion, naturally our 40/50 with it's large engine is rather worse than the average car, but our 20.HP. car should be quite as good as any other car of it's size. Probably it is better as it is fitted with a large radiator and not much exhaust pipe surface. We must not however over-look the fact that this little engine has probably more HP. for it's size than other similar engines. Mr. Hives is working on all these points. R.{Sir Henry Royce} | ||