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General control line discussion => Open Forum => Topic started by: cory colquhoun on July 01, 2017, 04:29:36 AM

Title: Warped wing
Post by: cory colquhoun on July 01, 2017, 04:29:36 AM
Anybody get any tips on how to straighten trailing edge,the trailing edge on the inboard wing of my  newly built twister slightly bows  , not covered yet
Title: Re: Warped wing
Post by: RC Storick on July 01, 2017, 05:02:53 AM
Steam it straight
Title: Re: Warped wing
Post by: Dennis Moritz on July 01, 2017, 12:27:56 PM
Steam it straight. Make longitudinal (lengthwise) exacto cuts. Lock straight with thin CA in cuts.


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Title: Re: Warped wing
Post by: cory colquhoun on July 01, 2017, 01:07:09 PM
Ok, will give it a go, thanks
Title: Re: Warped wing
Post by: RC Storick on July 01, 2017, 01:07:44 PM
Quote from: Dennis Moritz on July 01, 2017, 12:27:56 PM
Steam it straight. Make longitudinal (lengthwise) exacto cuts. Lock straight with thin CA in cuts.


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No need for any cuts just a lot of steam and it will get loose, Then warp past the spot you need it and it will relax close to right shape. Steam as many times as needed.
Title: Re: Warped wing
Post by: Mike Griffin on July 01, 2017, 03:57:17 PM
A tea kettle works great for steaming. 

Mike
Title: Warped wing
Post by: Dennis Moritz on July 01, 2017, 04:27:23 PM
Right. Warp in opposite direction with steam. In my experience wood returns to previous shape after a time. Some method of locking wing straight helps. Monokote and the like will allow shape to lock pretty solid. Some combat fliers are great getting monokote wings to warp straight. Phil Cartier did his magic on something I built. Wing stayed true for years.


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Title: Re: Warped wing
Post by: cory colquhoun on July 01, 2017, 05:23:20 PM
I used Pva glue will this be affected by the steam?
Title: Re: Warped wing
Post by: Dennis Moritz on July 01, 2017, 08:24:38 PM
White glue yellow glue any of the wood glues will soften when heat is applied. Then harden again when cooled. Probably those characteristics will assist warp removal.


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Title: Re: Warped wing
Post by: Tim Wescott on July 01, 2017, 08:32:15 PM
OK.  Everything that's been said is absolutely true, BUT:

1: I would only do the longitudinal cuts and re-gluing if things were really bad and the application of heat did not work, and
2: If the warp isn't bad, sometimes dry heat (like a heat gun) works well -- I find it more convenient

The best solution is to go back in time and smack yourself upside the head before you build in a warp, but no one has figured out how to do that, yet.
Title: Re: Warped wing
Post by: cory colquhoun on July 01, 2017, 11:03:08 PM
Warp was only slight and boilling kettle did the trick, it is straight for now ,best cover it and hope it stays that way


 Cory
Title: Re: Warped wing
Post by: RC Storick on July 02, 2017, 01:39:17 AM
Quote from: cory colquhoun on July 01, 2017, 11:03:08 PM
Warp was only slight and boilling kettle did the trick, it is straight for now ,best cover it and hope it stays that way


 Cory

It works even after covered. So no worries.
Title: Warped wing
Post by: Dennis Moritz on July 02, 2017, 08:36:36 AM
Great. What kind of covering?


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Title: Re: Warped wing
Post by: RC Storick on July 02, 2017, 02:08:50 PM
Quote from: Dennis Moritz on July 02, 2017, 08:36:36 AM
Great. What kind of covering?
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Any kind! You can steam a 4x4 with enough steam. It works on foam wings, silk covering, polyspan, silkspan, plywood Just the degree of heat needed.
Title: Re: Warped wing
Post by: cory colquhoun on July 02, 2017, 11:56:31 PM
Quote from: Dennis Moritz on July 02, 2017, 08:36:36 AM
Great. What kind of covering?


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