I quit. Deleted all post's.

Crank

Thank you everyone for the help REGAURDING MY QUESTION. Like the idea of the brass bearing tube. This will be my last post on this topic, I can't take anymore.

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I have had instances in the past where music wire joiners (with a single push rod) have torsionally deflected under flight loads, putting a roll moment into the plane during sharp pull ups.

To eliminate this, I usually join elevator halves with a wood dowel the same diameter as the thickness of the elevator at the hinge line. I then drill through the dowel into the elevator an inch or so (depending on size of plane) and insert music wire pins into the holes, epoxying them in place. This produces good torsional stiffness between the two elevators.

If using a single wire to join elevators, use as large a diameter wire as practical, and keep it short along the hinge line! Torsional deflection of the unit is proportional to the lenght of the wire along the hinge! Really, the dowel method is better. The wood dowel (typically 1/4") is torsionally stiffer than 1/8" music wire, surprisingly.

Randy L.

I am using 3/8" wood dowel for joining halves and works great!