ORIGINAL: xcz5785
I have an Sbach that has rates that go from 45deg. On high rates to 20 deg. for low rates. I started with 140% for he high on the radio but I hav to go down to 30% to get the 20 deg. The servo arm and the horn are the same distance from center (hing or servo spline) to connection point, approx. 1.5". The arms are 90deg to the pushrods, not necessarily to the servo body. Conection on horn is in line with the hinge pivot. Is this correct to have such a low number not close to 100%? Had to start at 140% or it would be almost 0% for low rate. I have not had a plane with 3D rates before. Can take some pics if that would help.
thats the nature of the 3d beast you cant have low rate resolution and 45deg on the flippers. Its not going to fly like a pattern ship with a 3d cg anyway so dont worry.if you want to piddle with geometry to get it correct I would highly recomend spending 9 bucks on this
http://www.envisiondesignusa.com/evd..._Overview.html. your drawing has perfect geometry. shortining the servo arm will require the horn to move forward of the hinge line and still keep the arms and linkage parallel. with that said it doesnt have to be perfect unless your anal like me