Letter to Ferodo Limited regarding the testing of various brake drum materials including carbon steel, cylinder iron, and 'Lepaz' iron.
| Identifier | ExFiles\Box 141\1\ scan0107 | |
| Date | 5th March 1936 | |
| X 1180 Exptl. Dept. Hs {Lord Ernest Hives - Chair} /AFM. {Anthony F. Martindale} 14/KW. 5th March, 1936. J.N.Longley Esq., Chief Chemist, Messrs. Ferodo Limited, Chapel-en-le-Frith. Dear Mr. Longley, I am sending you under separate cover the 0.9% carbon steel brake drum, as promised. I am also sending another kind of C.I. drum, made of R.R. cylinder iron, which, if you have time when all the other tests are finished, you might try for fading. I enclose some photomicrographs, and our Laboratory Report. When Lake & Elliot's metallurgist was last here he promised in spite of protests to try to reproduce the structure you have been advocating. His efforts, judging by specimens 118 and 119, which I received recently, have not been wholly successful, and I should like you to confirm, or otherwise, my impression that this material would not be suitable for rubbing against Ferodo. If you find it desirable I can let you have some drums with this structure. I also enclose our pictures of "Lepaz" Iron, and the makers' booklet, in which they print a photomicrograph. Since you have already tested this material, perhaps you can give me your opinion of it. If you approve, I can let you have two drums made of "Lepaz". When the tests you are so kindly making for us are a little more advanced, I should be gladto come over and discuss the results with you. Kind regards, Yours very truly, FOR ROLLS-ROYCE LIMITED. | ||
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).