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).
Radiator core test results, different core types, and the strength of oil coolers.
| Identifier | ExFiles\Box 149a\3\ scan0159 | |
| Date | 9th March 1936 | |
| -2- radiator core ? In any case, if the core tested is the same in each test, it does not seem reasonable to get a lower air temperature to boil" figure, with less air passing. (3) Again, at 30 m.p.h. the heat dissipations are the same, yet the air temperature to boil figures differ. These facts do not seem to correspond, assuming that the tests were carried out with identical water mean and air inlet temperatures. With regard to your latest type of core - the 18 x 62 constant - we are naturally anxious to have particulars of a sample of this core. However, we are deeply sensible of the fact that we are already indebted to you for information, etc. concerning your Mark V and Mark VI types of core (which has made it possible for us to standardise the former), and do not wish to do anything prejudicial to your interests in this country. As we do not make our own radiator matrices, any information which you may give us will necessarily be passed on to Messrs. John Marston and Co.Ltd. (a subsidiary of Imperial Chemical Industries) who manufacture our matrices. They supply us at present with the Mark V type of block and have made experimental Mark VI blocks for us. We should like to know whether you have any objection to this, and if you have not, would like to receive particulars, test figures, and preferably a sample of your latest 18 x 62 type of core. If you agree to this, we will send you an official order and dimensions etc. for a suitable sample test block. With regard to the question of strength of oil coolers, we have now made up a cooler on the lines suggested in your letter, and although it has only had preliminary tests, we think it is definitely stronger than our previous ones. Mr. Day informs us that while he was there you mentioned to him a new design of cooler which you had produced, which was infinitely stronger than the type on which we are at present working. We should like to know if there is any information available on this subject. | ||