ORIGINAL: Matthew Allen
I possibly shouldn't bring this up again
, but I just did a little research on Google after not understanding too well all that stuff about linkages a few pages ago. I found this explanation which has some nice clear diagrams:
http://www.modelaircraft.org/mag/hur...rmgeometry.pdf
Matthew
One thing I don't think Ernie mentioned and is advised at the above link: If you plan on off-setting the control horn to remove the differential, aluminum servo arms and ball links are recommended.