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Old Jul 17, 2012, 10:37 AM
Spittwadd
United States, SC, Fort Mill
Joined Jul 2011
10 Posts
Discussion
L shaped springs.

Ive recently been having problems bending ths type of spring for pull spring control. the main problem is the tendency for the spring to flip over in the hingeline. Is there a specific procedure for bending this type of spring so it wont do this? or should I just fix the end of the spring to the inside of the hinge somehow?

These type of springs seem extremely finicky from my experience, so Im wondering if im just doing it wrong.

I can post pictures if necessary

Duncan
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Old Jul 17, 2012, 11:46 AM
Aeromodeller by heart!
RubSon's Avatar
Herning, Denmark
Joined Dec 2002
632 Posts
Hi.

Yes, they tend to do that.
I just use a piece of tape to secure them in the hinge line..

Ruben
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Old Jul 17, 2012, 01:48 PM
ground penetration specialist
Nathan Schmoekel's Avatar
USA, MI, Grand Rapids
Joined Apr 2007
1,818 Posts
Tape works OK, but recently I came up with something that I like better....

I took a piece of .015 wire 1.5 inch long and bent it in half.... like a "U" shape. Next I sharpened the ends; and pinned the far end of the spring to the front edge of the hinge gap. Finished up with a drop of CA to lock it in place.
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Old Jul 17, 2012, 01:51 PM
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Thermaln2's Avatar
Reno Nevada
Joined Oct 2007
2,508 Posts
I don't know if you are doing the U-shaped spring or the one folded back on itself version. IN the folded back one, I cut a small piece of bondable teflon, like 1/8" long and slipped it over the folded end and slid it on about 1/4". Then when I put the spring in, I tack glued the teflon in the hingeline with some CA. If you re-do the spring, you can slide it out of the surfaces and then slide it out if the tubing. The tubing just effectively holds it in line so it does not pop out of the hingeline. this at least worked for me.

Chris
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Old Jul 17, 2012, 02:27 PM
Spittwadd
United States, SC, Fort Mill
Joined Jul 2011
10 Posts
these are great ideas! thanks everyone.
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Old Jul 17, 2012, 03:04 PM
Russ Young
isoarthenland's Avatar
United States, UT, South Jordan
Joined Mar 2006
1,165 Posts
I know there must be a sequence of bends that cause the spring to stay nicely tucked in the hinge line under all flexes, but I haven't taken the time to figure it out. I just keep creating new ones and trying them until I get the one that stays put.
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Old Jul 17, 2012, 03:41 PM
Will fly for food
davidjensen's Avatar
Bellevue WA,
Joined Dec 2003
6,637 Posts
I struggled with this for a full evening. Gave up and started something else. Now I know how to keep them pesky springs in place.
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Old Jul 17, 2012, 03:48 PM
Throw it like you hate it
RCPC's Avatar
United States, CA, Castro Valley
Joined Apr 2007
3,060 Posts
Flip the spring around (anchor the ends in the other tube) or offset the two bends like this: http://www.rcgroups.com/forums/attac...mentid=4376516

Hope this helps.
Paul
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Old Jul 17, 2012, 04:46 PM
Father of Fr3aK, DLG Pilot
tom43004's Avatar
USA, OH, Worthington
Joined May 2002
6,595 Posts
I went back to two lighter Z springs opposite each other. Even with tape or teflon tubing I still found them dangling in the airstream or buggering up the hinge line foam from time to time.

Maybe I wasn't doing it right.
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