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Author Topic: dope question  (Read 2566 times)

Offline Russell Shaffer

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dope question
« on: December 07, 2015, 01:34:10 PM »
I'm low on tautening dope.  Can I fill the weave with non tautening and then switch to tautening and get decent results?  Keep in mind that for me, "finish" means that it's done.  Thanks
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Russell Shaffer
Klamath Falls, Oregon
Just North of the California border

Offline Mark Scarborough

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Re: dope question
« Reply #1 on: December 07, 2015, 01:54:28 PM »
I would say a definate maybe,,

you MIGHT be able to cheat this by overreducing the clear dope, but it will take LOTS more coats ( wont leave more on the plane, )
by over reducing it you cause it to shrink out more, so you might get some tautening effect,,

best not use that nylon like the ringmaster,, just sayin
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For years the rat race had me going around in circles, Now I do it for fun!
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Offline billbyles

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Re: dope question
« Reply #2 on: December 07, 2015, 02:31:37 PM »
Quote from: Russell Shaffer on December 07, 2015, 01:34:10 PM
I'm low on tautening dope.  Can I fill the weave with non tautening and then switch to tautening and get decent results?  Keep in mind that for me, "finish" means that it's done.  Thanks

Russell,

Probably won't work well.  The tautening dope relies on penetrating the covering material so it will have a pliable coating to shrink with the dope.  Best to start with the tautening dope.  If you don't have enough tautening type then if the covering is pretty smooth as applied you may get away with using the non-tautening dope as it shrinks about 4% to 5%.  Tautening shrinks around 10% to 12% and shrinks sooner.
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Bill Byles
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Offline Russell Shaffer

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Re: dope question
« Reply #3 on: December 07, 2015, 02:51:55 PM »
Thanks.  I'll use tautening until it's done or I run out, then switch.  Mark, that nylon went away, never to be used again for airplanes. The Ringmaster is also gone, salvaged for parts.
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Russell Shaffer
Klamath Falls, Oregon
Just North of the California border

Offline Mark Scarborough

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Re: dope question
« Reply #4 on: December 07, 2015, 02:55:26 PM »
Russell, did it finally die, or did you commit mercy killing,,
that was the scariest thing to fly,, lol not to mention looking at it was frightening, or maybe it was just the looking at it LOL

and people wondered why you were so willing to let anyone,, and I mean ANYONE fly it LOL

go get some more taughtening dope man,, you know what its like to fly with loose covering,,  LL~
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For years the rat race had me going around in circles, Now I do it for fun!
EXILED IN PULLMAN WA
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Offline Russell Shaffer

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Re: dope question
« Reply #5 on: December 07, 2015, 03:37:43 PM »
Bill planted it in the grass in Salem but it was fixable with minor effort.  I did think about fixing it but it was such of piece of fine workmanship that I decided to let it die peacefully. 
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Russell Shaffer
Klamath Falls, Oregon
Just North of the California border

Offline Mark Scarborough

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Re: dope question
« Reply #6 on: December 07, 2015, 04:05:22 PM »
Quote from: Russell Shaffer on December 07, 2015, 03:37:43 PM
Bill planted it in the grass in Salem but it was fixable with minor effort.  I did think about fixing it but it was such of piece of fine workmanship that I decided to let it die peacefully. 
egads.,
so what does that leave me to tease you about now?
I guess the rubber banded wing thing, but its so weird its cool, so I cant harass you about that one,, hmmm
I guess I will just have to be quietly supportive now ,,
so much for my fun,,,,, HB~> LL~
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For years the rat race had me going around in circles, Now I do it for fun!
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Offline billbyles

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Re: dope question
« Reply #7 on: December 07, 2015, 04:28:30 PM »
Quote from: Russell Shaffer on December 07, 2015, 02:51:55 PM
Thanks.  I'll use tautening until it's done or I run out, then switch.  Mark, that nylon went away, never to be used again for airplanes. The Ringmaster is also gone, salvaged for parts.

Hi Russell,

I should have mentioned this in my first post: I do just the open bays with the tautening dope for the first 3 coats or so, & the rest of the airplane with the non-tautening dope.  That way it takes very little tautening type dope.  Tautening & non-tautening type dopes are completely compatible with each other (no doubt you already knew that but thought I'd throw it in.)
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Bill Byles
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Offline Russell Shaffer

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Re: dope question
« Reply #8 on: December 07, 2015, 05:06:45 PM »
Thanks Bill.  I think I actually have enough on hand now.  I'll follow your advice.
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Russell Shaffer
Klamath Falls, Oregon
Just North of the California border

Offline Steve Helmick

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Re: dope question
« Reply #9 on: December 07, 2015, 05:40:43 PM »
Russell, the NWSR banquet is sometime in January...I might be able to arrange for a gallon of clear Randolph to attend the banquet, if you plan to attend again.  ;)  Steve
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Offline Russell Shaffer

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Re: dope question
« Reply #10 on: December 08, 2015, 10:13:56 AM »
A gallon would probably last longer than I will.  I doubt I'll see you this January. 
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Russell Shaffer
Klamath Falls, Oregon
Just North of the California border

Offline Fredvon4

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Re: dope question
« Reply #11 on: December 08, 2015, 12:04:55 PM »
Hey Steve. if I fly up can I get a gallon also?   **) S?P

Grin

I need to make a road trip to my daughter in Dallas (closest aircraft supply is up her way 3 hrs trip from me) and get a gallon of good dope...got too many builds to suffer the expense of more Sig dope although I like the stuff
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