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 from Harrison Radiator Corporation regarding cooling inhibitors, water jackets, air conditioning, and car heaters.
| Identifier | ExFiles\Box 149a\3\ scan0201 | |
| Date | 4th December 1936 | |
| 1278. HARRISON RADIATOR CORPORATION LOCKPORT, NEW YORK December 4, 1936 Mr. C. S. Steadman, Messrs. Rolls-Royce, Limited, Derby, Derbyshire, England. Dear Mr. Steadman: Have delayed answering your letter of October 20th wherein you make specific request for information concerning inhibitors, etc., which are recommended for use in General Motors cars. Have written a colleague of mine requesting that this information be forwarded and so far have not heard from him. Have therefore, decided to answer your letter immediately and forward on this specific information upon receipt. Will be very much interested indeed, to learn the results of test outlined in your letter determining the value of the water cooling of the exhaust ports. In connection with increased amount of water swept jacketed surface, we have found that the difference between the normal length water jacket and the full length water jacket has been in the neighborhood of an 8° increase in top tank temperatures with the full length jacket, this figure applying and being an average of tests run on 6 and 8 cylinder engines. In connection with air conditioning and car heating of automobiles, there is nothing being done over here aggressively to my knowledge, as far as air conditioning itself is concerned. There have been two or three attempts to produce such a system, but unfortunately the majority of them to date have considered only mechanically driven refrigeration compressors, which are exceptionally bulky to handle and are not satisfactory in service. Some years ago, the General Motors Bus Company equipped a bus with a separate gasoline engine for driving a refrigeration compressor which was reasonably satisfactory from a performance point of view, but very definitely out from a cost and maintenance point of view. Am enclosing photographs and performance data on all the car heaters which were produced in large quantities in this country last year, and insofar as heaters which are in production for this year are concerned, we have not yet had an opportunity to duplicate the data. However, insofar as we are concerned, the output from our heaters has not been materially increased. We have made structural changes for appearance HEAT TRANSFER PRODUCTS AVIATION . AUTOMOTIVE . MARINE . INDUSTRIAL RADIATORS . SHUTTERS . OIL TEMPERATURE REGULATORS . CAR HEATERS . THERMOSTATS . HEAT EXCHANGERS | ||