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 John Marston Ltd. regarding the performance of their Mark VI cores and requesting a supply date.
| Identifier | ExFiles\Box 150\3\ scan0014 | |
| Date | 1st May 1936 | |
| X1280 Exptl. Dept. HS{Lord Ernest Hives - Chair}/Std.6/JH. 1st May, 1936. Messrs. John Marston Ltd., Paul St.{Capt. P. R. Strong} Works, Wolverhampton. For the attention of Mr. Southall. Dear Sirs, We have received your letter of April 29th, for which we thank you. We would point out that the three curves mentioned in our last letter to you were the three curves on the single sheet sent you, i.e. referring to cores with .020", .040" and .060" air gaps respectively. We note from the sheets included in your letter that your Mark VI matrix has still not obtained the standard of efficiency of the Harrison core, particularly at low speeds. We should very much like you to give us some indication of when you will be ready to supply us with Mark VI cores. An early reply to this will be appreciated. Yours faithfully, FOR ROLLS-ROYCE LTD. | ||