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William T Bartlett's suggestion about using the plastic push-rods for the
flap position indicator is right on! I've been using a version of this from
the beginning, but with one exception - Use Teflon tubing and "music wire"
because with moderate temperature changes, the plastic push-rods will change
length a bit. May not be enough to bother with but I did a lot of RC flying
in another like and found my trim changing all over the palce as the day
grew hotter or cooler.

A good candidate might be a bicycle brake cable - it's the same principle
and the inner component is metal.

I not only use this method as a position indicator, I also use it as the
position feed-back to my flap positon selector circuit/mechanism. With a
"balk" at flap zero, I don't have to look out at the wing to be sure of the
flap position when executing a go around. I just push the lever to the up
stop and know the flaps are going to stop at the "flaps up" stop. Sure takes
the load off when at 50 feet, all ready to land and the tower gives you the
go-around command!

Dan Schaefer

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