Letter discussing that the Harrison matrix is over-cooled based on temperature figures, and a query about steering friction.
| Identifier | ExFiles\Box 11\5\ 05-page066 | |
| Date | 19th April 1934 | |
| G.W. Hancock, Esq., Hotel de France, Chateauroux(French test region), Indre, France. Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} 16/KW.19.4.34. Re. 28-EX. Thank you for your letter of the 17th. One point appears to emerge from your figures, which are most interesting, and that is that we are over cooled for the Harrison matrix, at any rate at high speeds. We say this because you are only getting a water temperature of 69° with an air temperature of 26°. In other words, on the hottest day we can think of, which is about 38°C., the top water temperature would only be about 80°. It is therefore clear that we could reduce the dimensions of the matrix considerably when we use the Harrison type core. The effect of the oil temperature is certainly surprising. We note what you say about the steering. Are you obtaining the good results with the friction in the column and pivots and all the rest of it, or have you removed these ? Hs {Lord Ernest Hives - Chair} /Rm. {William Robotham - Chief Engineer} | ||
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).