>>>> I have ,for sometime been concerned >>>> Reasons >>>> 1. twisting of the elevator tips >>>> 2. the mass balance arm and mountings must be able to carry 15 times >>>> the weight of the mass balance
Thank you for the head-up on that - never really stopped to think about the G forces also acting on the balance weights. Not only is this force trying to pull the weights off the control surface - but if the weights are attached away from the control linkage - there will be a further tendency to "twist" the control surface (under G). Not sure why he wants as much as 15G ability. Torsional rigidity (lack of) is a contributing factor for flutter and I believe that the tendency to use thicker airfoil sections (up to 9%) on the stab will improve this as a potential weakness. Steve J
