Well OK, but i only suggest the tip tab as an interim solution, as a very cost effective initial solution. The retreating blade can easilly incorperate reverse twist, to follow overall downwash,as long as it is feathered. I think the biggest concern with cyclically altering blade twist has to be the risk of eigenmodes becoming divergent...
Mart
Last edited by Graviman; 5th May 2005 at 04:32.