[NSRCA-discussion] Epoxy Question

[george w. kennie]

Good point Jeremy !!!!!!!!!!!!!
  ----- Original Message ----- 
  From: JEREMY CHINN 
  To: NSRCA Mailing List 
  Sent: Thursday, November 22, 2007 11:55 AM
  Subject: Re: [NSRCA-discussion] Epoxy Question


  Another +1 for the Urethane glue! 
   
  I have been using it for several years now in laminating foamcore profile fuselages, sheeting giant scale and pylon racer wings, etc. As for the moisture usage, pay attention to the moisture content in the air around you. Humid climates like those where I live (Memphis TN) often don't need any extra moisture added depending on the time of the year. Its always worth it to do a quick experiment with the glue the night before skinning to understand how it will behave.
   
  Whatever you do, don't forget to put some plastic sheeting or waxed paper between the skins and the shucks. Forgetting to do so will almost certainly result in a wing glued to the shucks. 
   
  Happy Turkey Day! 

  > From: geobet at gis.net
  > To: nsrca-discussion at lists.nsrca.org
  > Date: Thu, 22 Nov 2007 11:44:20 -0500
  > Subject: Re: [NSRCA-discussion] Epoxy Question
  > 
  > Jim,
  > The stuff is extremely easy to use. Squeegee it on the skins in the same way 
  > you do the epoxy. There's no need to hurry, it doesn't flash off on you the 
  > way epoxy does.I have a small bottle filled with H2O that has a spraycap 
  > fitted and I just lightly mist the cores before attaching the skins.I have 
  > two pieces of 2'x4'x3/4" chipboard that I use, one beneath and one on top 
  > of the shucks. On top of the top board I place two Cement Blocks. The blocks 
  > weigh 42 pounds apiece and the chipboard is probably another 15-20 
  > additional pounds. Sounds like a lot, but the results are super. If you try 
  > this method, you will probably not go back to epoxy.I think the bond is 
  > stronger and the U migration into the foam strengthens the foam yielding a 
  > stiffer wing. The weight is probably the critical factor as the expansive 
  > forces of the glue are significant.
  > Good Luck,
  > Georgie
  > 
  > 
  > 
  > 
  > ----- Original Message ----- 
  > From: "J N Hiller" <jnhiller at earthlink.net>
  > To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
  > Sent: Wednesday, November 21, 2007 4:28 PM
  > Subject: Re: [NSRCA-discussion] Epoxy Question
  > 
  > 
  > >I have been reluctant to try it thinking I would screw it up. How much do
  > > you put on? How much weight is needed to contain the expansion.
  > > Jim Hiller
  > >
  > > -----Original Message-----
  > > From: nsrca-discussion-bounces at lists.nsrca.org
  > > [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of wgalligan
  > > Sent: Wednesday, November 21, 2007 1:14 PM
  > > To: NSRCA Mailing List
  > > Subject: Re: [NSRCA-discussion] Epoxy Question
  > >
  > > If this question was raised as a method for skinning wings, then why not 
  > > use
  > > urethane glue. One part, spreads easy and cures hard and quickly with 
  > > plain
  > > ole 02moisture. Gives ample working time and unlike epoxy will expand 
  > > with
  > > moisture to fill voids and between foam beads. Available at local 
  > > hardware
  > > stores and less expensive.
  > >
  > > Seems like a no-brainer to me.
  > >
  > > Wayne Galligan
  > >
  > > ----- Original Message -----
  > > From: "J N Hiller" <jnhiller at earthlink.net>
  > > To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
  > > Sent: Wednesday, November 21, 2007 2:00 PM
  > > Subject: [NSRCA-discussion] Epoxy Question
  > >
  > >
  > >> Thin Epoxy? I have been using "HOBBYPOXY SMOOTH 'N' EASY" epoxy finishing
  > >> resin to skin foam wings, spreading it with a scrap balsa squeegee. It 
  > >> has
  > >> ample working time and is thinner than glue. Is this OK? I have had no
  > >> problems using it on unsealed skins at about one ounce per 800 square
  > >> inches. I need to try sealing the skins on my next build.
  > >> Jim Hiller
  > >>
  > >>
  > >>
  > >
  > >
  > > ----------------------------------------------------------------------------
  > > ----
  > >
  > >
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