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 Illsley Company following up on tests of their closed radiation units, discussing valve sizes and enclosing testimonials.
| Identifier | ExFiles\Box 173\3\ img137 | |
| Date | 24th March 1934 | |
| MADISON 2366 ILLSLEY COMPANY PRECISION AUTOMOTIVE EQUIPMENT COOLANT CONTROL VALVES 38 PIQUETTE AVENUE DETROIT, MICHIGAN March 24th, 1934 Mr. W. A.{Mr Adams} Robotham % Rolls Royce Ltd. 32 East 57th Street New York City. Dear Mr. Robotham:- Being uncertain of your correct address in England, we are sending this letter as above, with a request that it be forwarded to you. Having been much interested in the personal talk with you here last month, my wish is to write you now in two respects. First,- to ask what results have been obtained thus far from tests of our closed radiation units? And second,- to enquire whether you have encountered any installing or operating problems on which either you need more information from us, or, which are enough different from conditions here in the States so that we would benefit by hearing of them from you. We shall be glad to answer any questions on the first point, and would be appreciative of any comments you may care to send us on the second. The chief question we have been keeping in mind is, whether our 3/8" size will be found large enough, or whether you will need the 1/2". We doubt that you will, but even so would be glad to be kept advised. Not knowing your ratio between residual heat in B.T.Us. and heat dissipating capacity of your radiator, my talk and recommendations to you were based on general experience thus far over here in the States. In this connection the two enclosed photostats of letters which happened to come in last week, will doubtless interest you. The one from Denver is really quite extraordinary, for these 5-ton engined trucks are using no larger Valves than the samples sent you, despite the fact that they are operating at altitudes 5,000 to 7,000 feet above sea level, and on gradients so severe that a 5-ton engine is required in a 2 1/2-ton truck. The second letter comes from a more authoritative source than appears on its face, for the writer- Harry Knepper- happens to be one of our pioneer racing drivers of 30 years ago. His extensive experience and sound judgment have won unusual recognition; particularly from Colonel Vincent at Packard, etc. This is the second year he has driven through the entire winter with no replenishing of anti-freeze whatever. Awaiting with interest, further word from you, we are Very truly yours, Louis H.{Arthur M. Hanbury - Head Complaints} Illsley | ||