Insides vs Outsides different, what to do?

[Larry Renger]

It seems to be consistent that my Sky Sport design turns outsides better than insides.  I have two .061 models and now the .15 size one.  I can fix it on each model by biasing the bellcrank or handle, but I would really like to build perfect trim into the design.  My thoughts are to tweak either or both the thrustline and the elevator angle setting.

Anyone out there with a clue?  (I am told that Jamisons do the same thing, and I am just finishing up one of those, too, so HELP??)

[Wynn Robins]

seems to me that you are building the control system with incorrect geometery - I am only guessing that you are using 90 degree horns - which will make this happen.

There are a few good articles on how to build symetrical systems - i'll see if i can scan one in.

[Jim Thomerson]

I had an extreme problem with a 40 size airplane.  I corrected it with 3 degree shims under the engine.  the thrust-line was that much off.