I'll take a guess and say that it is an Extra 230 designed by Jim Van Loo and later kitted by ACE R/C. Don't know where to balance it but there is a way to find the 25%-30% point on the wing. I'll try to describe it.

Take one wing half, add the length of the tip chord to both the front and back of the root chord. Do the same to the tip (add the root chord to both the front and back of the tip chord). This will give you four points in a rectangle shape.

Draw diagonal lines from the corners of the rectangle and they will intersect on the wing. This is the aerodynamic center of the wing (may not be the physical center).

Using the chord at this point of the wing, measure 25-30% back and that is your balance point. For example, if the chord is 10" at this point, the balance will be 2.5 - 3" rear from the leading edge at this point. A drawing would help but I don't have one- hopefully this makes sense.


Engine- this looks like a "120" size plane.

Dave Michael