I'm in a bit of a quandary. I'm building a Brodak Strega (the kit) and I'm at a point where I need to make some decisions on the control system. The kit comes with two nicely made control horns, 1/8" dia. wire with 1/16" thk. x 1/4" wide uprights. The uprights are drilled with clearance holes for the 5/64" dia. push rod ends that came in the kit. I don't plan on using the push rods from the kit; I'll make the pushrods from 3/16"OD CF tubing with the threaded ends epoxied in. I'm just not sure what to do about the control horns. As I see it, I have the following options:
I can drill them out for 4-40 bolts and use ball joints but I'm a little leery of the offset load the ball joints will put on the uprights. The Strega is a large plane and from what I've heard, tends to build heavy and I tend to build heavy although I'm trying very hard to lighten up on this one.
I can drill them out and bush them for the 5/64" dia. push rod ends in the kit, modified to work with the CF push rods. I'm just worried that by the time I drill a hole big enough for the bushing there will be almost no material left in the uprights for strength.
I can scrap the kit horns and get Tom Morris double arm horns intended for ball joints. I know that this is hands down the most rugged approach but is it really necessary?
If UltraHobby still made those nifty clevises I could easily use them on the elevator pushrod and maybe even figure out how to make one work on the flap pushrod with it's two-plane articulation but they don't so that's not a solution.
What to do? Suggestions? Anyone? Anyone?
Topic: A Quandary (Read 771 times)