[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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