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MK Control Horn Installation

 

Step 1

I used to just insert the short dowel that holds the horn into the control surface. But on a couple of occasions I had slop develop from the dowel compressing the foam and balsa around its perimeter. So now I install all of these dowels into a 1" balsa block with its grain running perpendicular to the surface. I've never had one of these installations loosen up.

Start out by cutting two pieces of 1"x1"x whatever balsa block, long enough to go from top to bottom of the surface plus a bit. Use a fine pen to carefully trace the outline onto the top surface of the elevator (in this example, same for any control surface).

Make sure that the FRONT of the block sticks out a bit from the hinge line, 1/16" is fine. Using a scroll saw with the table set at 90 degrees to the blade, with the elevator on the shuck, carefully make the cutout slightly undersize and then sand to a perfect fit.

 

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