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 the Harrison Radiator Corporation about radiator test blocks, cooling curves, and requesting clarification on technical terms and test data.
| Identifier | ExFiles\Box 149a\3\ scan0158 | |
| Date | 9th March 1936 | |
| X1278 Exptl. Dept. Hs{Lord Ernest Hives - Chair}/Std.5/KW. 9th March, 1936. The Harrison Radiator Corporation, Lockport, New York, U.S.A. For the attention of Mr. L.P. Saunders. Dear Sirs, We thank you for your letter of January 24th, and we are forwarding the Chausson Gallay test block to you immediately. We also hope to send you a Marston Mark VI Block in the near future. We note your remarks re relative cooling with Mark V.{VIENNA} and Mark VI blocks, and are enclosing a set of curves showing test figures taken here on the two types of block, as well as one of your own blocks and a Gallay core. In view of your remarks we shall investigate the solder bond, etc., on the Mark V block. We do not quite understand what you mean by the terms 20 x 55 & 18 x 62 constants. Does this indicate some dimension of the matrix; i.e., ratio of direct cooling surface to indirect surface, etc. ? We have read your letter of Jan. 6th to our Mr. Day, and are rather puzzled by one or two statements in it. We should be grateful if you could explain the points in question - (1) what is meant exactly by "Air Gaps"; and (2) on the sheet of test figures made on Harrison 1935 Chevrolet core, it is stated that in the case of the 5 semi-restricted louvres, at 60 m.p.h. the air temperature to boil is 121.7°F.{Mr Friese}, as against 116.3°F.{Mr Friese} for the other case, whereas the heat dissipated is greater in the case of the 5 unrestricted louvres. This appears to be contradictory; also we are not clear what louvres are referred to - are they some form of restriction placed before or after the | ||