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).
The dispatch of blueprints for a backing strip to improve fan performance at low speeds.
| Identifier | ExFiles\Box 136\2\ scan0032 | |
| Date | 1st February 1939 | |
| 1153 c. Rm.{William Robotham - Chief Engineer} By/Ald.{F. Allwood - Experimental Design}2/AW.1.2.39. FAN - SECTION 5220. Please receive herewith 2 Blue Prints of the following Drawing:- EXS.1389. Backing Strip - 5 off. This piece is to replace EXS.1053 in order to try to improve the output of the Fan at low speeds. Kindly instruct 1 set. Ald{F. Allwood - Experimental Design} By/Ald.{F. Allwood - Experimental Design} | ||