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  • September 20, 2019, 06:55:51 AM

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Author Topic: Silk dope coats  (Read 832 times)

Online Dennis Toth

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Silk dope coats
« on: August 27, 2018, 04:27:43 PM »
OK, making forward progress on the Barnstormer. Question I did the silk on the wing using the dry/CA method that Charles (Avaiojet) described to me. It worked great (simply said its like putting silk on as if it is MonoKote except that instead of using an iron to tack it down you use CA). With this method you give the frame 4 coats of clear then really pull the silk tight and add dots of CA starting at the high point, then the tip and pull the silk very tight as you work your way the rest of the frame. When you pull the silk tight there is very little relaxing of the silk as you put the clear on (first around the frame then the open  bays). I put on 2 coats of litecoat to secure the silk to the frame and one coat over the open bay followed by 3 coats of Supercoat to tighten it the last little bit.


My question is how many coats of the Supercoat should you put on before switching to lite coat to complete the fill of the weave?


Best,    DennisT

Online Dave_Trible

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Re: Silk dope coats
« Reply #1 on: September 10, 2018, 04:35:23 PM »
Dennis I’d say stay with the tautening dope until the silk doesn’t bag or loosen any more with a fresh coat.  There is a good chance if you try the lite coat or non- tautening too soon and it bags, it may take a very long time for the silk to pull up again.  With full strength nitrate likely about four coats.  With the Sig butyrate is go about five- six coats.   This is why I cover silk wet.  The wet silk will stretch just a little more so when it dries it returns to its original state- not any tighter .  When you cover dry it MIGHT not pull all the way back to its original state with the first dope coat since it starts filling the open weave.  If it did turn out OK then you are pretty good with silk.

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Offline Shorts,David

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Re: Silk dope coats
« Reply #2 on: September 07, 2019, 03:12:38 PM »
Hi Dave, I'm in a similar boat, er, plane? I just posted about my problem. I I'd put the silk on wet and had the bays very tight. Now they are looking saggy. Is it too late to switch to supercote? It will it get tight eventually using lite Cote?

Offline Avaiojet

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Re: Silk dope coats
« Reply #3 on: September 07, 2019, 05:19:29 PM »
OK, making forward progress on the Barnstormer. Question I did the silk on the wing using the dry/CA method that Charles (Avaiojet) described to me. It worked great (simply said its like putting silk on as if it is MonoKote except that instead of using an iron to tack it down you use CA). With this method you give the frame 4 coats of clear then really pull the silk tight and add dots of CA starting at the high point, then the tip and pull the silk very tight as you work your way the rest of the frame. When you pull the silk tight there is very little relaxing of the silk as you put the clear on (first around the frame then the open  bays). I put on 2 coats of litecoat to secure the silk to the frame and one coat over the open bay followed by 3 coats of Supercoat to tighten it the last little bit.


My question is how many coats of the Supercoat should you put on before switching to lite coat to complete the fill of the weave?


Best,    DennisT

Den,

The amount of coats it takes to fill the weave depends on the mix and how tight the weave is.

Unlike Dave, I see no reason to apply silk wet, as I once did.
I see no reason to use nitrate either, as I never have.

A "method" used by one person may not be the same "method" used by another.
And the results can be equally as good.

Here's my, results, tight as a drum:


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Offline Randy Powell

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Re: Silk dope coats
« Reply #4 on: September 11, 2019, 02:51:10 PM »
Not how I do it, but if it works.....
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