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).
Letter discussing under-bonnet temperature and petrol boiling issues, comparing a Spectre to a Cadillac.
| Identifier | ExFiles\Box 91\4\ scan0078 | |
| Date | 6th July 1935 | |
| G.W. Hancock Esq., Hotel de France, Chateauroux, Indre, France. X300d Hs{Lord Ernest Hives - Chair}/Rm{William Robotham - Chief Engineer}/10/KW.6.7.35. Thanks for your notes. We find that the Cadillac has a higher under bonnet temperature than the SpectreCodename for Phantom III and yet does not vapour lock. This shows that if you keep the petrol pipes cool up to the point where they enter the bonnet, the problem is not insoluble. Of course we admit we have not run the Cadillac under the same conditions as you have been running the SpectreCodename for Phantom III in France. One interesting fact is that if we remove the outside air intakes we do get into trouble with petrol boiling in the carburetters. If we have the space for cool air to come in at the sides of the radiator as you suggest, we shall not be able to get enough air through the radiator to cool the car because the trouble is, we cannot get the air we already put through the matrix out from under the bonnet. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||