OK,  thinking ahead to connecting the pushrod to elevator horn in my
Classic model (Smoothie), not a lot of room for my standard setup,bushed
horn leg and 3/32" music wire with soldered washers.
Always liked the idea of the brass bush about 3/16" wide, more wear surface
for the wire,in the Brodak instructions it shows the wire going through the
horn leg,no bush.Would make it easier to fit in the plane but I wonder how
long before the wear would affect it?
Paul Allen

I don't know if would work in Oz, but I used ball link connectors at both horns (3 ball links) in my ARF Smoothie. I added access hatches to the rear fuselage for adjustment, though that has not proved necessary after original construction. For the record, this particular Smoothie is fully take-apart and has traveled the world. Anyway, there is adequate room for the installation and nothing else results in equal control precision (IMHO that is). The ball links facilitate take-apart and assembly, too.

OK,  thinking ahead to connecting the pushrod to elevator horn in my
Classic model (Smoothie), not a lot of room for my standard setup,bushed
horn leg and 3/32" music wire with soldered washers.
Always liked the idea of the brass bush about 3/16" wide, more wear surface
for the wire,in the Brodak instructions it shows the wire going through the
horn leg,no bush.Would make it easier to fit in the plane but I wonder how
long before the wear would affect it?
Paul Allen

Paul,

In most applications, working clearance for the elevator pushrod and control horn can be a problem, especially in older designs.

What ever you do, don't compromise on making the connect by leaving out bushings etc.   In the first photo, you can see that there was not enough room for making a proper bend in the pushrod, and to include a good bearing surface.    The tip of the pushrod extends through the fuselage side, and this is easily hidden with a thin piece of balsa, blended into the side of the fuselage.  You do what you have to do.

In the second photo is an installation utilizing the aluminum clevis sold by Ultra Hobbies.   Doc is right, it is a great clevis, but it is bulky and takes up as much room as a bent wire pushrod or ball links.   There are plywood spacer in the second photo, that will be removed later on.  They are there to insure that the clevis is centered between the fuselage sides, and they will be removed after the elevators are installed, and the horn position is finalized.

Keep in mind that connections in the control surfaces have to be smooth and reliable for a long time....no compromises here.

Cheers.

Warren Wagner