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).
Series of inquiries regarding car heaters, radiator rust preventives, and comparative tests on aircraft radiator cores.
| Identifier | ExFiles\Box 149a\3\ scan0198 | |
| Date | 20th October 1936 | |
| -2- I wonder if you would mind giving us some data on the subject of car heaters, air conditioning, combined car-heaters and windscreen defrosters, etc. The comparative weights and performance figures of various types would be of interest. Hitherto, this equipment has been regarded as an accessory in which we had little concern, but we think that this needs changing. As far as we are aware, only one type of car heater is manufactured in this country - by Messrs. Clayton Dewandre of Lincoln - and we think that their heater (which a number of customers use) is probably very heavy for the performance it puts up. (2) Could you give us any information about the Radiator rust preventive which is used by Buick (I believe it is marketed by United Motor Service) or any similar preparation ? I believe some corrosion inhibitor is also included in G.M. Anti-freeze. (3) We should also be very interested to hear from you on the subject of aircraft radiator cores. While liquid cooled aero engines are not standard practice in the U.S.A., we are aware that there are at least three liquid cooled engines under test and presume that you know as much as anyone about matrices suitable for liquid cooling. We have ourselves recently carried out some comparative tests on different types of matrix at our Works here; only small model radiators were used and I fear that the test apparatus did not approach your laboratory standard of accuracy. However, we think that the results were reliable enough to give fair comparisons. I am including a copy of the report on these tests, which may be of interest to you. What we should like to receive from you, if possible, is some data (which is comparable on the same basis as our test results) of various types of American matrices, if these differ at all from the ones tested here. Two or three matrices of the film type were tested originally, but their drag figures put them so hopelessly out of the running that we did not proceed with them and they are not included in the report. I should also like to know whether you would be willing to carry out any tests for us if necessary - would your 'Dissipator' be capable of giving air speeds through the core equivalent to an air speed of 100 - 150 ft/sec. in a duct, having a cross sectional area equal to the core frontal area, in which the core would be fixed. | ||