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 Harrison Radiator Corporation discussing comparative tests on Mark V and Mark VI radiator blocks.
| Identifier | ExFiles\Box 149a\3\ scan0154 | |
| Date | 7th January 1935 | |
| Exptl. Dept. Hs{Lord Ernest Hives - Chair}/Std.9/KW. 7th January, 1935. The Harrison Radiator Corporation, Lockport, New York, U.S.A. For the attention of Mr. Saunders. Dear Sirs, We thank you for the information contained in your letter of Dec. 10th, 1935, and note your offer to give us test figures on the Chausson Gallay type of block if we forward same. We are endeavouring to obtain a suitable test section of this block for this purpose. The depth of block which we shall attempt to obtain is. Meanwhile we should be very grateful for your advice on another point which has arisen. We have carried out tests over here comparing two Harrison types of matrix which we term Mark V and Mark VI respectively (see attached sheet) which were originally introduced to us here by our Mr. Robotham, and which are made for us by Messrs. John Marston & Co.. You supplied us with a block of the Mark VI type in accordance with our letter of June 4th, 1934, this Mark VI type block being the latest type of block when Mr. Robotham was last in the States (termed by yourselves 20 x 55 constant), and the Mark V being the previous block used by yourselves. The nett result of our tests here is that a 52 m.m. Mark VI block will apparently dissipate approximately 13% more heat than a 58 m.m. Mark V block under similar maximum car speed conditions. On the other hand, we can detect no difference between the 84 m.m. Mark V and 84 m.m. Mark VI blocks. | ||