A short piece of brass tubing can be used at both ends of the pushrod. The
control horn end is bent in an L shape and fits into the control horn. The
servo end may have a length of 1/32" music wire soldered into the brass
tubing and a "Z" bend in the servo end. The tubing is glued to the carbon
rod with CA. The tubing may be removed by heating the CA area with a solder
iron and simultaneously gently pulled apart. One advantage of this system
is the possible length adjustment after flight trimming to zero out
transmitter adjustments. A disadvantage is that tubing may have to be bored
out to allow larger diameter carbon rods to fit without reducing the
diameter of the rod by sanding. 1/16" brass tubing may be easily bored to
.038" by turning the drill slowly (in a drill press) and holding the tubing
with common pliers and cleaning the fileings frequently. Fast turning
drills bind quickly and break frequently.
Phil Pearson
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