ORIGINAL: rccardude04
By the way, I think when they say 30% expo, they probably mean -30 don't they?
I don't know how Hitec does it any more. I had an Optic 6 but can't recall if - or + was more or less sensitive... Easiest way to check is to fire it up to 100% and see if it's super sensitive around center or seems to be really sluggish around center. The normal use for Expo, especially on a 3D type plane, is to calm down the controls around center so that you don't over-correct like crazy. If you go the wrong way, it'll be SUPER sensitive and likely hit the ground very quickly in an involuntary manner.
-Eric
Eric, on my HiTec, negative expo is the way to go. 30% sounds about right. My feeling on expo is to at least find the amount that will make the stick to control surfaces movement linear. If you look at the way a servo arm swings around during stick movement, at first a little bit of arm movement will move the control surface a bunch. As the arm moves around to more point at the horn, then the same about of servo arm movement does not move the control surface as much. There is some percentage of expo that will correct this.