Hi Group,  I’ve checked my aileron travel distance after balancing them and discovered I did not have enough travel distance downward (only about 17 degrees and not the required 20 degrees) however I have plenty in the upward direction.  The interference was coming from the lead counter weight itself hitting the top wing, inside wing skin.  (the problem seems slightly worse on the Pilot side than the copilot side)   I used the Lancair cantilevered counter weights that screw to the top of the aileron flange and not the older style that bond to the underside of the flange.  After shaving away enough weight to provide the proper downward aileron I need to add more weight…. About 30% more I’m estimating.  The weight installation instructions say to bevel the edge as required.  I had to do more than just bevel the edge. 

I’m going to have to add the older style weight to supplement the cantilevered weight.  Has anyone else had this problem?  I can’t imagine that moving the weight forward or aft would make much difference but maybe there’s an optimum location I haven’t found.  Any thoughts would be appreciated.

Joe Trepicone IVPT

(trying to get my engine started with 90% to go!)