Standardised Fatigue loading Sequences for Helicopter Rotors (Helix and Felix) Part 2. Final Definition of Helix and Felix
ROYAL AIRCRAFT ESTABLISHMENT FARNBOROUGH (UNITED KINGDOM)
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This Report defines two loading standards for the fatigue evaluation of helicopter rotor materials and components. They were developed as a collaborative study between West Germany, the Netherlands and UK. Details of the contributing organisations are given in Appendix A. The new loading standards follow the earlier TWIST Transport Wing Standard, and FALSTAFF Fighter Aircraft Loading Standard For Fatigue evaluation. After the tradition of these earlier loading sequences, the new loading standards have been given identifying names. For these the origin of the word helicopter helix-spiral, pteronwing from the Greek has provided a convenient basis. The new standards are called Helix - loading standard for hinged or articulated rotors Felix - loading standard for fixed or semi-rigid rotors. This report defines the final form of the two standards, statistical content according to different counting methods and full details of their method of generation. Additional keywords Algorithms Fortran program.
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