[NSRCA-discussion] [Fwd: Re: Wing Construction]

John Gayer jgghome at comcast.net
Fri Nov 9 20:26:44 AKST 2007


I'm having a lot of difficulty getting mail to the list. It doesn't 
bounce but it doesn't post either. Anyone have any clues?

-------- Original Message --------
Subject: 	Re: [NSRCA-discussion] Wing Construction
Date: 	Thu, 08 Nov 2007 23:15:28 -0700
From: 	John Gayer <jgghome at comcast.net>
To: 	NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>
References: 	<002701c82219$103d2ab0$6401a8c0 at jaysdesktop> 
<99669A13AAF54657ACED1594A0F001CB at Windoze> 
<4C2CB387C321AA469DAFCAEECDCBED4009320F at bsbpbex1.bsb.simula.armorholdings.local> 




If you lay a few strands of carbon tows in the epoxy bead on the diamond 
pattern you drew on the wing, you will end up with a wing that does not 
need a spar of any kind and is extremely rigid in torsion. That includes 
torsion resistant ailerons after you cut them out.
John

Woodward, Jim wrote:

> Instead of cutting out the "diamond" shape lightening holes, which 
> can/will produce diamond-shaped depressions or low-points in the wing 
> if too much vacuum is pulled or too much weight is added during the 
> sheeting cure, you could always just draw on an "X" on the sheeting 
> and lay one the glue in the X-pattern.  You get the "weight" savings 
> from the glue, without the negative impact of the honeycoming.
>
> Thanks,
>
> Jim W.
>
>  
>
>  
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>
> *From:* nsrca-discussion-bounces at lists.nsrca.org 
> [mailto:nsrca-discussion-bounces at lists.nsrca.org] *On Behalf Of *Suart 
> Chale
> *Sent:* Thursday, November 08, 2007 10:36 AM
> *To:* 'NSRCA Mailing List'
> *Subject:* Re: [NSRCA-discussion] Wing Construction
>
>  
>
> Once you have a diamond shaped template (2) it is actually very quick 
> to cut out the foam with a hot wire.  The templates may take a bit of 
> time to make however.   With a "honeycombed wing" using a syringe to 
> apply the glue in the center of your foam structure is the way to go.  
> I think I used a 12 gauge agiocath (plastic part of an IV setup).  You 
> can get away with less epoxy and it will certainly adhere as it is in 
> beads much thicker than the squeegeed on version.  I will agree though 
> that you risk soft spots in the structure that may show up or easily 
> be pushed in by heavy hands as there is no foam beneath.  I have done 
> most of my wings the standard way with a thin layer of epoxy over the 
> entire foam surface and have never had that delaminate either so I 
> think it is good enough strength wise.  Personally I do not think I 
> would honeycomb wings again.  I still have a 60 sized Desire with them 
> (built in '91) so they do hold up but I do not think it is worth the 
> weight savings.  Coring the center may be the better way to fo to 
> remove foam weight.
>
>  
>
> Stuart
>
>  
>
> ------------------------------------------------------------------------
>
> *From:* nsrca-discussion-bounces at lists.nsrca.org 
> [mailto:nsrca-discussion-bounces at lists.nsrca.org] *On Behalf Of *Jay 
> Marshall
> *Sent:* Thursday, November 08, 2007 10:07 AM
> *To:* 'NSRCA Mailing List'
> *Subject:* Re: [NSRCA-discussion] Wing Construction
>
>  
>
> Seems like the fastest way would be with a drill press and cutting out 
> circles rather than diamonds or square?
>
>  
>
> */Jay Marshall/*
>
> -----Original Message-----
> *From:* nsrca-discussion-bounces at lists.nsrca.org 
> [mailto:nsrca-discussion-bounces at lists.nsrca.org] *On Behalf Of *Dave 
> Smith
> *Sent:* Thursday, November 08, 2007 9:57 AM
> *To:* NSRCA Mailing List
> *Subject:* Re: [NSRCA-discussion] Wing Construction
>
>  
>
> Karl,et al:   Ukie fliers have been coring wings this way for years.
>
>  
>
>  
>
> Dave
>
>     ----- Original Message -----
>
>     *From:* Karl G. Mueller <mailto:kgamueller at rogers.com>
>
>     *To:* NSRCA Mailing List <mailto:nsrca-discussion at lists.nsrca.org>
>
>     *Sent:* Thursday, November 08, 2007 10:46 AM
>
>     *Subject:* Re: [NSRCA-discussion] Wing Construction
>
>      
>
>     Mark,
>
>      
>
>     I have found that it is very hard to get more than 1 oz. out of each
>
>     panel on a 2m  pattern wing.
>
>     I have seen this method done in Europe a number of years ago.
>
>     It is a lot faster, once you have the right setup, than cutting
>     out all
>
>     the little squares or diamond shapes.
>
>      
>
>     Karl.
>
>         ----- Original Message -----
>
>         *From:* flyintexan <mailto:flyintexan at comcast.net>
>
>         *To:* NSRCA Mailing List
>         <mailto:nsrca-discussion at lists.nsrca.org>
>
>         *Sent:* Wednesday, November 07, 2007 10:30 PM
>
>         *Subject:* Re: [NSRCA-discussion] Wing Construction
>
>          
>
>         I second that motion!  This is a great way to take about an
>         ounce of foam out of each core.
>
>          
>
>         -mark
>
>             ----- Original Message -----
>
>             *From:* Lance Van Nostrand <mailto:patterndude at tx.rr.com>
>
>             *To:* NSRCA Mailing List
>             <mailto:nsrca-discussion at lists.nsrca.org>
>
>             *Sent:* Wednesday, November 07, 2007 9:21 PM
>
>             *Subject:* Re: [NSRCA-discussion] Wing Construction
>
>              
>
>             Karl,
>
>             My answer might surprise you.  When I have need to core my
>             foam cores I core them from root to tip so the foam
>             surface is in full contact with the skins.  My wings were
>             of interest to several people at the Nats to see how this
>             works, but the local guys are used to my weirdness.  This
>             approach produces a wing with no soft spots on the surface.
>
>             --Lance
>
>              
>
>                 ----- Original Message -----
>
>                 *From:* Karl G. Mueller <mailto:kgamueller at rogers.com>
>
>                 *To:* NSRCA Mailing List
>                 <mailto:nsrca-discussion at lists.nsrca.org>
>
>                 *Sent:* Wednesday, November 07, 2007 7:53 AM
>
>                 *Subject:* Re: [NSRCA-discussion] Wing Construction
>
>                  
>
>                 Lance,
>
>                  
>
>                 Do you apply the glue to the skins or to the foam core
>                 in case of a
>
>                 cored (with cut-outs for weight saving) foam core. I
>                 thought that the
>
>                 amount of glue spread on the skins in the areas that
>                 do not make
>
>                 contact with the foam would be unnecessary weight. It
>                 will strengthen
>
>                 the skin some.
>
>                  
>
>                 Karl G. Mueller
>                 kgamueller at rogers.com <mailto:kgamueller at rogers.com>
>
>                     ----- Original Message -----
>
>                     *From:* Lance Van Nostrand
>                     <mailto:patterndude at tx.rr.com>
>
>                     *To:* NSRCA Mailing List
>                     <mailto:nsrca-discussion at lists.nsrca.org>
>
>                     *Sent:* Tuesday, November 06, 2007 11:13 PM
>
>                     *Subject:* Re: [NSRCA-discussion] Wing Construction
>
>                      
>
>                     Foam roller, my friend.  a squeegee will force
>                     resin into the pores and away from the joint. 
>                     Only a roller applied fast and light can meter the
>                     material properly and keep in on the surface.
>
>                     --Lance
>
>                      
>
>                         ----- Original Message -----
>
>                         *From:* Nat Penton
>                         <mailto:natpenton at centurytel.net>
>
>                         *To:* NSRCA Mailing List
>                         <mailto:nsrca-discussion at lists.nsrca.org>
>
>                         *Sent:* Tuesday, November 06, 2007 9:32 PM
>
>                         *Subject:* [NSRCA-discussion] Wing Construction
>
>                          
>
>                         To skin a foam core with contest grade balsa
>                         does anyone have a preferred way to determine
>                         when the amount of epoxy applied is adequate -
>                         using Easy Lam epoxy. I have been reluctant to
>                         use a squeegie, afraid of scoring the balsa.
>                         Would appreciate any
>                         comments.                            Nat
>
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>
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