stunthanger.com

Building Tips and technical articles. => Building techniques => Topic started by: Rob Killick on April 17, 2007, 08:42:11 PM

Title: Lead-out line length ?
Post by: Rob Killick on April 17, 2007, 08:42:11 PM

Hi ,

I was wondering how I can keep the lead-out lines an equal length as the wing .
I mean when I begin wrapping the lines , how can I ensure that they will be the same length ?
Should I make a jig to keep the lines an equal length ?

Thanks :)

Title: Re: Lead-out line length ?
Post by: Randy Powell on April 17, 2007, 10:45:26 PM

I usually mark mine before the wing is covered. Try to get them as close as possible.

I also leave them kinda long so that if I have to re-wrap them due to a screw up, I have the material to wraps. 

Title: Re: Lead-out line length ?
Post by: Howard Rush on April 18, 2007, 12:40:01 AM

I have one longer than the other so the connections don't snag. 

Title: Re: Lead-out line length ?
Post by: minnesotamodeler on April 18, 2007, 03:24:00 AM

Ooooo, I like that excuse...now I can stop worrying about it.  Thanks, Howard!

--Ray

Title: Re: Lead-out line length ?
Post by: Randy Powell on April 18, 2007, 09:49:15 AM

Howard has so many snags in the rest of his life that he tries to avoid them where he can.   LL~

Title: Re: Lead-out line length ?
Post by: Kim Doherty on April 18, 2007, 11:34:59 AM

Rob,

As I use a hard point handle and do not have any adjustment for level, here is how I make my leadouts exactly the same length.

1. Install both leadouts to the bell crank.
2. Pull one leadout all the way out and make a very fine mark on both leadouts at the same point near the end of the leadouts.
3. Pull the other leadout all the way out and mark it across from the point where the first mark moved towards the wing tip.
4. You now have one leadout with two marks and one with only one.
5. Carefully measure the distance between the two marks on the one leadout and divide in half.
6. Measure and mark this half distance (between the two marks)on the leadout with the two marks.
7. Now bring the single mark on the other leadout to coincide with the middle mark on the other.
8. Clamp  or tape the leadouts together.
9. Using small wire bending pliers (the type with the round rod on the end) make a full  bend at the point you want the ferrule to be. (this works with cable or solid lead outs)
10. Do not worry about the leadouts catching on one another. If they are smoothly wrapped, they will never touch each other.
11. You now have two leadouts marked at exactly the same point (with a nice small radius bend) and your bell crank is parallel to the center line of the plane.

Kim.

Title: Re: Lead-out line length ?
Post by: Igor Burger on April 20, 2007, 02:52:07 PM

>>>how can I ensure that they will be the same length ?<<<
It is doable, but if you then move leadouts, you will disalighn them  VD~

Title: Re: Lead-out line length ?
Post by: frank carlisle on April 20, 2007, 07:15:53 PM

You guys are really scientific........I've always figured if the lead outs were within a half inch of each other they were equal.
I guess I'll have to try it your way. y1

Title: Re: Lead-out line length ?
Post by: minnesotamodeler on April 21, 2007, 07:57:41 AM

You get 'em within a half inch???

--Ray

Title: Re: Lead-out line length ?
Post by: Steve Helmick on May 06, 2007, 12:33:36 PM

"You get 'em within a half inch???

--Ray"

If they're not within a half inch, they won't fit in his truck...  LL~ Steve

Title: Re: Lead-out line length ?
Post by: captcurt on May 07, 2007, 03:16:28 PM

You can tell who uses hard-point handles!!  :)

I set the geometry of the BC to correct neutral angles, then I cut both leadoouts together outside the wingtip.

THis is before the the flap rod or anything else is adjusted.  THis way, I know that the BC is properly at netral if I make up the ends properly.  I try to get them within a 1/16" or less.  Same with lines--although I do pre-stretch the lines after wrapping one end.

Curt