http://www.vc10.net/Files/BOAC_EngNews_3403_red.pdf
After watching the beeb doc on Rolls Royce I looked a little further into the Hyfil Blades that were one of the Major causes of the Bankruptcy . I had never realised that they had actually flown these blades on a smaller engine .I still find it hard to believe that such a great engineering company could not have foreseen that the anisotropic properties of unidirectional carbon might have been a problem .