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General control line discussion => Open Forum => Topic started by: kevin king on June 04, 2020, 08:47:11 PM

Title: Thimble size for wrapping lines
Post by: kevin king on June 04, 2020, 08:47:11 PM

Are the small size THIMBLES from Brodak ok to use for making up 018 lines wrapped with copper wire for a 60 sized airplane?

Title: Re: Eyelet size for wrapping lines
Post by: Crist Rigotti on June 04, 2020, 10:15:51 PM

The eyelets need to be large enough for the the line clip to go through.

Title: Re: Eyelet size for wrapping lines
Post by: kevin king on June 04, 2020, 11:25:42 PM

Quote from: Crist Rigotti on June 04, 2020, 10:15:51 PM

The eyelets need to be large enough for the the line clip to go through.

Sorry, I meant thimble not eyelets

Title: Re: Eyelet size for wrapping lines
Post by: Craig Beswick on June 05, 2020, 02:27:32 AM

I have some small Brodak thimbles and I would not use them with .018 size lines! They are too small in my opinion.

Medium yes. But, as previously described it will also depend on the line clips you are going to use.

I am a novice so info for what it is worth.
Good luck
Craig.

Title: Re: Eyelet size for wrapping lines
Post by: Dan McEntee on June 05, 2020, 06:31:19 AM

Quote from: kevin king on June 04, 2020, 11:25:42 PM

Sorry, I meant thimble not eyelets

       What Crist means is that the line clips you use to connect the lines to the handle and lead outs needs to pass through. I think that even the large, 1/8"  thimbles are pretty small. The size range they are presenting is only .015" difference between them. The small is 3/32" and the Large is 1/8", and that's not only .030" between those. Makes me wonder if there is some sort of typo error. If these are your only choices, I would go with the large. You need a little bit of size to allow for the curve in the ends of the connectors to wiggle through when attaching your lines.
    Type at you  later,
    Dan McEntee

Title: Re: Thimble size for wrapping lines
Post by: Crist Rigotti on June 05, 2020, 08:36:39 AM

Dan,
Right!  I use the 1/8" thimbles. 

Title: Re: Thimble size for wrapping lines
Post by: Brent Williams on June 05, 2020, 09:37:40 AM

The large thimbles from MBS are great. 

Title: Re: Thimble size for wrapping lines
Post by: john e. holliday on June 05, 2020, 11:30:03 AM

I myself don't use them.  I get small brass tubing and run it through a flame until red hot.   Slide line/cable through it snd wrap tubing around 1/8 wire or bolt.  It helps hold the cable while you wrap it.  But, I alos don't wrap lines or lead outs.

Title: Re: Thimble size for wrapping lines
Post by: kevin king on June 05, 2020, 11:09:31 PM

Thank you everyone. Appreciate it. 👍

Title: Re: Thimble size for wrapping lines
Post by: John Park on June 06, 2020, 03:16:56 AM

Quote from: john e. holliday on June 05, 2020, 11:30:03 AM

I myself don't use them.  I get small brass tubing and run it through a flame until red hot.   Slide line/cable through it snd wrap tubing around 1/8 wire or bolt.  It helps hold the cable while you wrap it.  But, I alos don't wrap lines or lead outs.

Exactly what I've always done.  I find that bending the tubing can be done easily by hand as long as the tube has been prepared as described, by heating to red heat and allowing to cool.  I've standardised on a 1" length of tubing, which forms a perfect teardrop shape round a 1/8" mandrel.

Title: Re: Thimble size for wrapping lines
Post by: Dick Byron on June 07, 2020, 05:09:58 PM

This is what  works.

Title: Re: Thimble size for wrapping lines
Post by: Lauri Malila on June 09, 2020, 05:10:39 AM

I'd prefer a stainless steel tube (hypodermic needle) from brass/copper tubing. At least with stainless leadouts, there is a lesser risk of corrosion. L

Title: Re: Thimble size for wrapping lines
Post by: John Park on June 09, 2020, 07:22:22 AM

Quote from: Motorman on June 06, 2020, 09:56:01 AM

You can bend 1/16" brass tubing without annealing if you have a piece of lead out wire through it. Annealing makes it softer which might not last as long.

Annealing doesn't soften the brass permanently.  It work-hardens very quickly, and bending it round into a teardrop shape may well be quite enough to re-harden it.  In any case, it does seem to age-harden over quite a short time.

Title: Re: Thimble size for wrapping lines
Post by: john e. holliday on June 09, 2020, 10:03:01 AM

I have yet to wear out the brass tube even after annealing. D>K

Title: Re: Thimble size for wrapping lines
Post by: FLOYD CARTER on June 11, 2020, 04:24:01 PM

Right!  I would be real happy if my planes lasted long enough to actually wear out my controls!