Online Community of Zenith Builders and Flyers
Kevin, there is a Zenith drawing that shows the method and locations to measure the deflections, do you have this document?
The off center elevator cable bellcrank tightens the cables when applying right aileron. the more flaps out the more the geometry affects the amount of right aileron available. Taking the bellcrank off the torque tube and mounting it solid on the airframe solves the problem. You cab google it there's lots of info. Some run the cables very slack so they can get more aileron with full flaps.
The aileron travel according to the plans isn't really what you need here; but the available aileron travel as flaps are further extended. Very easy to check it off the top surface of the aileron with digital level. Takes a few minutes. If yours is further restricted with increasing flaps then there is a potential problem on a landing with full flaps, slow airspeed and a right crosswind. Not enough aileron. It doesn't take much if you're slow like 40 TAS. Same thing on a slow full power go around with full flaps, slow airspeed and 912 ULS. It will roll left unless you bring the power in slowly and get the flaps up as soon as airspeed permits. Not enough aileron to control it. I think that's why there's only one notch allowed now and I agree. Also I have heard ZAC personnel say "just fly 50" that's about 1.6 Vso. Not very STOL.
I'm speaking of my airplane only. I don't know what others have found with theirs.
...and don’t forget to use the rudder as one of your tools to assist in counteracting a low speed torque roll.