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  #11  
Old 11-24-2019, 07:28 PM
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Quote:
Originally Posted by BEC
My go-to tape for hinges on small RC models is Scotch Multi-Task. But I don't think it would adhere well enough to what appears to be a stained or dyed balsa surface. In looking at the pictures my first thought is an old fashioned sewn hinge.

Another possibility I've seen used with mixed results is strips of Tyvek. There the trick would be much as GH describes for using Kevlar cloth: keeping the glue out of the actual joint but at the same time adhering the strip close enough to the edges of the pieces that they stay aligned properly.

Tyvek! I forgot about that one. Flexible and tough, but I have no idea if it tends to stretch under tension. I'm thinking not because USPS priority envelopes are made out of them? Can regular epoxy be used as an adhesive for tyvek?
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Old 11-24-2019, 07:34 PM
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Quote:
Originally Posted by jeffyjeep
My go to stuff for hinges is Dr. Shrink tape. It's an all plastic tape and has tremendous adhesion (you practically get a hernia unrolling it.) It CANNOT be torn--it has to be cut with a blade.

It's commercial use is to wrap boats and airplanes in white shrink film for seasonal storage or transport.

I've never heard of it before but it sounds like intriguing stuff, real interesting properties. Does it resist streteching? If it does then it would make ideal hinge material.
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Last edited by Rktman : 11-25-2019 at 08:50 AM.
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  #13  
Old 11-24-2019, 07:36 PM
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You can use regular epoxy to stick down Kevlar and to fill the weave. Just don't use 5-minute GARBAGE.
Keep it AWAY from the hinge joint and be aware that it flows.
I would not expect any stretch.

Generally where Tyvek is good, Kevlar is better.
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  #14  
Old 11-24-2019, 07:43 PM
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Quote:
Originally Posted by mojo1986
Kevlar cloth shouldn't stretch, but being a woven material, it may not be as dimensionally stable as the aluminum tape. You could always try it. Epoxy should do a good job of sticking it down as long as you work it into the weave.

I have some of the aluminum tape and can mail you a sample if interested.


Joe

Thanks Joe, very generous of you! I just checked my miscellaneous drawer and found a roll of what I think is aluminum duct tape. Does the adhesive side look the same as the outside when you peel back the paper backing?
I'm assuming aluminum tape is not the same thing as mylar tape even though they resemble each other?
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  #15  
Old 11-24-2019, 08:18 PM
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Thanks for al the great suggestions guys. It's much appreciated!
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  #16  
Old 11-24-2019, 08:32 PM
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Quote:
Originally Posted by Rktman
Thanks Joe, very generous of you! I just checked my miscellaneous drawer and found a roll of what I think is aluminum duct tape. Does the adhesive side look the same as the outside when you peel back the paper backing?
I'm assuming aluminum tape is not the same thing as mylar tape even though they resemble each other?



The aluminum tape is actual aluminum, and yes, the sticky side looks just like the side without adhesive. The adhesive on this stuff is extremely aggressive.

Mylar is a plastic material. It is not particularly stretchy. Neither is Tyvek, which is spun polyethylene fiber that has been laid down as a mat on a chill roll. It is breathable due to small open areas in the mat and so epoxy should permeate sufficiently well to give it good adhesion.


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  #17  
Old 11-24-2019, 08:54 PM
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Wood glue works well on Tyvek. Semroc used it on their Scout and Sprite kit to hold down the motor hook. Fliskits also used it for the same purpose on their Tumbleweed kit as well.
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  #18  
Old 11-25-2019, 08:06 AM
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Quote:
Originally Posted by mwtoelle
Wood glue works well on Tyvek. Semroc used it on their Scout and Sprite kit to hold down the motor hook. Fliskits also used it for the same purpose on their Tumbleweed kit as well.

Definitely something for me to consider (if tyvek resists stretching under a shock load) since wood glue would penetrate the balsa much better than epoxy (I think).
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Last edited by Rktman : 11-25-2019 at 08:55 AM.
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