Change of material for fan blades on Wraith and B.III models.
| Identifier | ExFiles\Box 99\3\ scan0004 | |
| Date | 26th February 1938 | |
| To HPS. {Horace Percy Smith - Experimental Factory Mgr} from Rm {William Robotham - Chief Engineer} /Std. c.c. Rm {William Robotham - Chief Engineer} /Wym. {G. Harold Whyman - Experimental Manager} 424 y 200/B also b24 Rm {William Robotham - Chief Engineer} /Std.1/MH. {M. Huckerby} 26.2.38. WRAITH & B.III FANS. The fans which have already been made for Wraith and B.III have had blades made of exceedingly soft aluminium. We have now obtained a sheet of the material which will be used in production and which is very much stiffer. Will you please fit blades of this material to the second B.III fan and also future B.III fans. Will you also fit blades of this material to all Wraith fans as they become available commencing with 28.G.VI when it is next in the shop. Any necessary material can be ordered from the suppliers of the blades, The Coventry Radiator Co. Ltd. Will you please hand Rm {William Robotham - Chief Engineer} /Std. one of the soft material blades off the first of the fans which are converted. Rm {William Robotham - Chief Engineer} /Std. | ||
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).