[NSRCA-discussion] wing tube sleeve hole

[J N Hiller]

I bevel the inside of the sleeve and use it to cut the hole by rotating it
while gently pushing it into the foam. The foam will brake loose about every
3 inches and needs to be ejected from the sleeve.
I cut the tube hole before sheeting as I use a partial rib to support the
outer end and need the tube sleeve to locate it before sheeting the core.
The core is supported in the shucks and shimmed as necessary to the proper
dihedral angle. The tube is slightly above center at the root to get the
outer end near the center. The core blank is cut with the root parallel to
the centerline so it is easy to cut the tube hole 90 degrees with a simple
guide for height and square ness. See photo. I hope I reduced the photo
enough to fit this post. Contact me directly for other or larger photos.
Jim Hiller

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Mike Miller
Sent: Thursday, November 08, 2007 5:09 PM
To: nsrca-discussion at lists.nsrca.org
Subject: [NSRCA-discussion] wing tube sleeve hole


http://www.mackrc.net/patternwings2/index.htm
<http://www.mackrc.net/patternwings2/index.htm>

http://www.nextcraft.com/foamwingsandparts.html
<http://www.nextcraft.com/foamwingsandparts.html>

Terry Brox's web site on balsa skinned wings is very good and does show the
drilling of the servo lead hole with a tube and by hand.

Their is some great information on these sites on building foam core wings.
But a very important part of a plug in wing would be the wing tube sleeve
hole in the core, to be straight and parallel to the desired line centered
and at the right angle to set the dihedral. Is there a site that explains or
shows the process of set up and drilling of this hole? If this step is not
perfect looks to me like the wing is dead no matter how good the skinning
process is.
Thanks in advance

Mike
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