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10-05-2008, 06:53 PM
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#1 |
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Gettin' Lower!
 Join Date: Sep 2008
Posts: 54
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kevlar pull pull
Is one line of kevlar cable enough for a 80 inch span model or should I double it. Do I have to prestretch the line ? Tks
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10-05-2008, 07:49 PM
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#2 |
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GRAVITY SUCKS
 
Join Date: Jan 2006
Location: florida
Posts: 4,281
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Re: kevlar pull pull
yes 1 line is enough. and i would not try and prestretch it.. it will take some time but it wont stretch very much
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10-05-2008, 08:07 PM
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#3 |
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100LL User
Join Date: Sep 2006
Location: Ft Myers Florida
Posts: 4,301
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Re: kevlar pull pull
I ran Kevlar pull-pull on the rudder of a 35% Yak for two years! Great stuff. Just be carefull that there are no rubs, chafing can lead to failure.
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10-05-2008, 08:12 PM
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#4 |
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Gettin' Lower!
Join Date: Sep 2008
Posts: 54
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Re: kevlar pull pull
How do you prevent rubs. The lines cross somewhere between the rudder and the servo arms.
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10-05-2008, 08:21 PM
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#5 | ||||||||||||||||||
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100LL User
Join Date: Sep 2006
Location: Ft Myers Florida
Posts: 4,301
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Re: kevlar pull pull
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10-05-2008, 08:52 PM
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#6 |
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Bad-ass Super Contributer!
Join Date: Jan 2006
Location: Carmel, NY
Age: 42
Posts: 394
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Re: kevlar pull pull
Stick them in small diameter tubes. Make sure the tubes stick out past the exit holes of the plane.
Smokey |
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10-05-2008, 09:52 PM
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#7 |
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Bad-ass Super Contributer!
Join Date: Jan 2006
Location: Wesley Chapel, NC, USA
Posts: 435
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Re: kevlar pull pull
Better yet, purchase coated Kevlar cord from Don's Hobby Shop.
http://www.donshobbyshop.com/ It's coated with a black PVC jacket, so there is no issue with abrasion and it crimps extremely well. It's also available in bulk from places like Aerospace Composites, under the name Kev-Cord. http://www.acp-composites.com/acp-cord.htm |
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10-05-2008, 11:21 PM
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#8 |
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Gettin' Lower!
Join Date: Sep 2008
Posts: 54
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Re: kevlar pull pull
I thought it's not safe to crimp kevlar cords but to just tie a knot and c/a the knot. I was thinking of using the Sullivan yellow colored kevlar cords. Tks
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10-06-2008, 08:21 AM
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#9 | ||||||||||||||||||
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100LL User
Join Date: Sep 2006
Location: Ft Myers Florida
Posts: 4,301
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Re: kevlar pull pull
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