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British Product for Tightening Threads
Posted by: Ron Orga (---.hr.hr.cox.net)
Date: September 29, 2013 11:47AM

I talked with a rod builder from England recently and he mentioned something they used in rod building called "dope." He said it is put on guide thread wraps before the finish is applied, and it causes the thread to tighten around the guide foot a little more than initially wrapped. Has anyone heard of this product and possibly used it? If so, is there any advantage? He said the term "dope" was a slang term and he did not know the proper name. Thanks.

Ron

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Re: British Product for Tightening Threads
Posted by: bill boettcher (---.dyn.optonline.net)
Date: September 29, 2013 01:27PM

Seams to be the same ?? stuff we use here ??

[jackfish.net]

Bill - willierods.com

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Re: British Product for Tightening Threads
Posted by: Jim Gamble (---.res.bhn.net)
Date: September 29, 2013 01:52PM

Dope = CP

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Re: British Product for Tightening Threads
Posted by: Ron Orga (---.hr.hr.cox.net)
Date: September 29, 2013 02:52PM

Thanks guys. I thought it might be CP but was not sure.

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Re: British Product for Tightening Threads
Posted by: Steve Mcleod (---.117.186.31.dyn.jtglobal.com)
Date: September 29, 2013 04:11PM

I very much doubt if any one here in the U.K. uses "Dope" on their thread these days, that stuff was crap and if I remember correctly it was a nitrocellulose type of CP.

Jersey, Channel Islands. (U.K.)

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Re: British Product for Tightening Threads
Posted by: Ron Orga (---.hr.hr.cox.net)
Date: September 29, 2013 04:28PM

he did say it was a while ago. Probably the same stuff.

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Re: British Product for Tightening Threads
Posted by: Phil Ewanicki (---.res.bhn.net)
Date: September 29, 2013 04:30PM

A solvent based coating might shrink silk thread but I do not think it would cause nylon or other synthetic threads to contract.

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Re: British Product for Tightening Threads
Posted by: Randolph Ruwe (---.hsd1.wa.comcast.net)
Date: September 29, 2013 05:20PM

Phil, Gudebrod nitrocellulose CP did indeed cause the thread to contract, especially if you put a rod with it on the threads in a sunny window on a warm day. I know, I did it on a very UL rod trying to hurry the curing process, and about an hour later I heard a crack. I went to the window and the rod was crushed at the butt wrap. I learned my lesson!!!

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Re: British Product for Tightening Threads
Posted by: bill boettcher (---.dyn.optonline.net)
Date: September 29, 2013 07:52PM

Remember

Thread holds the guides on the rod

Any thing else put on is just to protect the threads from the eliments

regular nylon thread can have two different colors
With CP like it came off the spool
Without it gets lighter and transparent

Been posted here MANY MANY times
Just stay here and read You will learn MUCH

Bill - willierods.com

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Re: British Product for Tightening Threads
Posted by: roger wilson (---.hsd1.mn.comcast.net)
Date: September 29, 2013 09:34PM

Another material that is called "dope" is the material that is used to finish cloth covered aircraft. As posted above, the "dope" causes the fabric to shrink and remove any loose fabric from the structure of the aircraft.
This material is still used for isolated cases of restoration aircraft.

As also stated above, it is a nitro cellulose material that drys quickly and does and excellent job - to help finish aircraft.

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