Modification to the 20/25 HP fan to reduce noise and requesting its standardization.
| Identifier | ExFiles\Box 104\3\ scan0216 | |
| Date | 13th July 1933 | |
| X5220 To Br. {T. E. Bellringer - Repair Manager} from E {Mr Elliott - Chief Engineer} /JNR. {Charles L. Jenner} E {Mr Elliott - Chief Engineer} /JNR. {Charles L. Jenner} 8/HP.13.7.33. c. Hs. {Lord Ernest Hives - Chair} re 20/25/HP. Fan. We send you herewith: LeC.3570 showing the fan with the trailing edges of the tips cut away to a curved shape. This has been proved to reduce the noise at high speed. Will you please have this put in hand as soon as possible, with a view to early standardization. E {Mr Elliott - Chief Engineer} /JNR. {Charles L. Jenner} | ||
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).