Cahsing the goose
Hi Svenstron
Thanks for the firm but polite posting. I am only to happy to acknowledge that this may be a case where the goose gets away.
I have been involved in a crash investigation on another aircraft type where it appears that the blade disbonded and the resultant loss of lift on that blade and the concurrent lift on the other blade resulted in the head tilting and the damaged rotor spar impacting the empenage. I have no firmly held position on this. All I ask is that the investigators consider my theory and if necessary dismiss it.
They may wish to look at this paper for reference on adhesive bond failure forensics:
M.J. Davis and D.A. Bond, The Importance of Failure Mode Identification in Adhesive Bonded Aircraft Structures And Repairs, 12th International Conference on Composite Materials, Paris, July 05-09 1999. If they wish to contact me I'd be only too happy to talk to them.
Regards
blakmax