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 to Mr. C. S. Steadman discussing cooling systems, radiator construction, a new car tunnel, and radiator materials.
| Identifier | ExFiles\Box 149a\3\ scan0238 | |
| Date | 7th February 1939 | |
| HARRISON Mr. C. S. Steadman Rolls-Royce Limited England February 7, 1939 Page 2 The statement that you do not get into trouble with a pressure system operating as such parallels our experience over here; but we do not have trouble when running at atmospheric pressure providing the outside air temperature is not high enough to stress the cooling system as a whole. Am inclined to agree with your suggestion that possibly the difficulty you have encountered in the past may be tied up entirely with cylinder head and jacket design. Doctor Smith's statement to you that the tube and fin construction may be used to provide a radiator rejecting the greatest amount of heat per cubic inch is correct, as is also the statement that the cost is not of vital importance which is also true regarding the weight. The thermostat shown to Doctor Smith has been tried and appears to have some merit in that excessively high block pressures which are now experienced with closed thermostats are not present. The print you sent showing the Bentley system has been gone over with interest, but unfortunately we cannot spend this amount of money on our cars over here for a by-pass type of installation. The new car tunnel is at present complete except for calibrations and adequate heating means for the fresh air. However, some members of the trade journals have been up to inspect it and no doubt a write-up will appear in one of our monthly or weekly periodicals shortly. Just as soon as such an article does appear, wish to assure you that copies will be sent to you for your comments. Appreciate very much indeed the information that you were able to obtain from your Aviation Division regarding the ethylene glycol and pressure cooling systems; in this connection believe that hydrogen brazed stainless steel radiators may be suitable for aviation work providing the surface is all direct. We contemplate running some tests on material of this description some time in the future, but based on tests which we have run in the past on ordinary steel, do not believe there will be much difference in the characteristics. Kindest personal regards, Sincerely yours L. P. Saunders LPS:BKW | ||