[NSRCA-discussion] Wing Construction

Thu Nov 8 06:43:10 AKST 2007

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

				----- 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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