RE: Quique Somenzini YAK-54S 73"
Tailspins: My elevator horns had the same problem yours does. QQ sent new ones,but that are identical,so I slashed some material of the bottom of the horns and also shortened them. They are now in somewhat of a correct position.
Also it seems these horns are not specifically for this kit. I have seen a couple other kits from different manufactures that have horns identical to the QQ 73" kit.
QQ told me that the Ruddder horns are O.K.,it is the amount of throw in the Manual that is wrong. Cut the throw down so that the ruddder horns and elevators all clear at max control.. If memory serves,he says 45-50 mm is plently on elevators. This after I had already made clearance for the horns.
Also,the clevis on almost each horn set up fits far too tightly,creating a lot of drag in the linkages.
Make certain your aileron servos mount as far forward in the wing as possible.
Dave