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Author Topic: Rudder non hinges.  (Read 1014 times)

Offline W.D. Roland

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Rudder non hinges.
« on: August 11, 2009, 08:43:37 PM »
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
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Online Geoff Goodworth

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Re: Rudder non hinges.
« Reply #1 on: August 12, 2009, 02:19:16 AM »
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

Offline W.D. Roland

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Re: Rudder non hinges.
« Reply #2 on: August 12, 2009, 07:07:19 PM »


That might be even easier just making holes instead of slots.
Brass rod or tube?


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Offline John Miller

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Re: Rudder non hinges.
« Reply #3 on: August 12, 2009, 08:28:52 PM »
I've used both, as well as copper wire and tube. Works well, simple, and the rudder is ground adjustable.
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Offline FLOYD CARTER

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Re: Rudder non hinges.
« Reply #4 on: August 19, 2009, 03:38:57 PM »
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.

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Offline Randy Powell

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Re: Rudder non hinges.
« Reply #5 on: August 21, 2009, 10:52:23 AM »
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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Eric Viglione

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Re: Rudder non hinges.
« Reply #6 on: August 21, 2009, 09:13:47 PM »
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


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