stunthanger.com
Design => Stunt design => Topic started by: W.D. Roland on August 11, 2009, 08:43:37 PM
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This looks like the place for this.
My last few control line stunt type airplane are done this way, so far I like it.
Cures a few problems
1--The old Dang it,knocked the rudder off on the car door HB~>
2- adjustable
3-Easy
4-holds adjustment with "normal" bumping and abuse.
Made from .030 soft aluminum.
Measure offset with strait edge on inside of fin to check setting if bumped.
Regular R/C type hinge slots.
Pictures are of light weight Shoestring practice/fun plane.
Looks like All up weight will be 23-24oz with fox stunt.
David
51336
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G'day David
A similar arrangement using 1/16" dia brass tube is used by John Miller and was included as an option on the drawing for the Brodak Shoestring.
It works well.
Cheers, Geoff
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That might be even easier just making holes instead of slots.
Brass rod or tube?
David
51336
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I've used both, as well as copper wire and tube. Works well, simple, and the rudder is ground adjustable.
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I've made ground-adjustable rudders using a strip of K&S plastic sheet of about .010 or .015" as hinge. Almost invisible and no clearance is required, as with pinned hinges.
Floyd
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I think there is more stress on the rudder than you might think. I prefer the rod adjustment that will hold steady even in heavy wind.
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I had that exact aluminum tab setup on my Avanti, they fatigued and snapped. At first I kinda liked the idea that it would flex in flight. I jokingly called it my "infinately adjustble load sensitive rudder", thinking that if the wind was blowing hard enough to straighten it out, then I didn't need much rudder at that moment anyways. The idea may still have merit, but with a limited travel coil spring over rod type setup. Rabe rudder would probably be better still.
I replaced them with pinned hinges, a small section of threaded rod and small 2/56 snap on type ball link setup. works much better and finer , more precise adjustment if all you want is an adjustable fixed rudder.
EricV