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).
Laboratory report on the failure of a Cadillac Fan Flange and Phantom III fan blades, including material composition analysis.
| Identifier | ExFiles\Box 94\5\ scan0069 | |
| Date | 16th September 1938 | |
| File Pur/Fan. M.1681. To Rm{William Robotham - Chief Engineer}/Std. from H1/E.JW. Laboratory. H1/E.JW. 1/JM.{Mr Morley} 16.9.38. By Please note & return Rm{William Robotham - Chief Engineer}/STD Failure of Cadillac Fan Flange & Phantom III fan blades. Your ref. Rm{William Robotham - Chief Engineer}/Std. 5/JH. 30.8.38. Rm{William Robotham - Chief Engineer}/Std. 2/MH.{M. Huckerby} 7.9.38. P. 324. 1. Failed Cadillac Fan flange. The above fan flange failed by fatigue. Photograph M.1681/1 shows central flaw and photomicrograph M.1681/2 shows that this flaw is a segregation in the material. This would weaken the flange considerably at this point. The brinell hardness on this material is 123, and the composition is as follows. T.C. 0.02% Mn. 0.33% S. 0.026% The analysis of the cadillac fan blade is as follows. Cu. 0.49% Ni. 0.74% Mg. 0.06% Mn. 0.25% Si. 0.42% Zn. Trace. Ti. Nil. Fe. 0.80% The brinell hardness of this material is 85. H1/TPB states that he does not know of any material in general use in this country which conforms to this composition. | ||