Own Hughes wrote:
> Our KR2 has the original plans flap linkage which consisted of the
flap torque tube squashed flat and turned up at 90 deg.
> While simple and cheap, I’m more than a bit worried about its
structural integrity. I notice significant lack of rigidity in the
split flap position even with the flap handle locked in position. The
flex appears to be at the 90 deg linkage in the wing stub.
One possible solution would be to chop the bent end off and replace it
with a "two piece shaft collar" with a bellcrank welded to it. You can
see one of these critters in the second from the last and the last photo
at http://www.n56ml.com/kcontrol.html . I used one of these on both
the elevator pushrod and my giant flap torque tube. It won't slip if
properly sized and torqued, at least mine have never slipped. McMaster
Carr sells them, at https://www.mcmaster.com/#shaft-collars/=19yz1lt
.... (scroll down for aluminum ones) .
I don't know enough about the geometry of the plans-built flap
mechanism, but this might work for you.
Mark Langford
m...@n56ml.com
http://www.n56ml.com
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