I've finished building my first bipe...a Lanier SE5a EP...


My question is on the aileron setup: This plane has dual aileron servos connected by a Y harness and ailerons on the upper and lower wings connected by a pushrod.

No matter what I do, I can't get the ailerons on the upper and lower wings to have equal throw. If I set up the lower ailerons for the correct throw, the upper has near the correct throw when going up and much more when going down. I have expiremented with different holes on the control arms, etc etc.

I have a few questions:

1st: Is it normal for bipes with dual ailerons to have different throw from upper to lower ?
(just due to the arcs that the control arms travel through)

2nd: if this isn't normal, what can I do to fix it?

3rd: if it is normal, which ailerons to I set the throws off of, upper or lower?

4th: do any bipe flyers recommend expo on the aileron servos? I've never flown with expo before but these ailerons look pretty snappy...I'm not sure what to expect. I've flown bipes on Real Flight briefly and I'm not sure how those are set up.

Thanks for any replies, this is a nice little plane and I don't want to pack it in on the maiden because of a screwy setup.