Incorrect material used for a fractured Wraith fan blade.
| Identifier | ExFiles\Box 8\9\ 09-page12 | |
| Date | 15th November 1937 | |
| H1/Mr. Whitehead. 624 Rm {William Robotham - Chief Engineer} /Std.7/JH.15.11.37. Referring to the report which you have promised to let us have on the portions of fractured Wraith fan blade submitted for your examination, the drawing, EW.947, specifies S./MD 239A material. As far as we have been able to determine there is not accurate record of what material actually was used for these blades. actually we have determined that the first two at least (of which the failed fan was one) was made from ordinary commerical black iron sheet. 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).