Hello Bob
"There must be some limit on the amount lengthening into slots - otherwise
the pip pin balls will ot have anything to grip on in the radial
direction.........?"
The pip pin balls grab onto the outer bushing, so the length of slot will
not effect the security of the pip pins if the balls are downward of the
outer bushing.
That said, remember that the torque tube is a spar. Vertical holes of pip
pins are outboard, but vertical holes weaken more than horizontal holes. I
ovaled mine to allow just a bit more than 1/2" at TE of stabilators.
Don't consider putting vertical holes in spar more inboard for obvious
reason.
Ron Parigoris
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