[NSRCA-discussion] Top hinging a foam wing

[Scott Smith]

First suggestion is to bevel the framing pieces before you glue them onto
the wing/aileron
about 8 degrees on each face for the ailerons.  To do this,
assuming you’re using ¼” material, cut a strip 1 ¾” wide and sand the taper
until you have triangle stock
it’s easy if you protect the ¼” side with a
straight edge and use a table edge to sand down to.  (I hope this makes
sense!)

 

Since the wing tapers out to the tip, you’ll need to install these pieces so
that the overhang on top surface stays constant.  In other words, don’t
center the bay face on both the inboard and outboard sides because this will
create a very large gap out toward the tip when you try to match up the
aileron!

 

One more way to convey the thought
if you use ¼” balsa to face the aileron
bay, you want a ¼” of material all the way across the top; you don’t want
that to taper down to something less that 1/4”. 

 

When cutting hinge slots, they need to be angled down slightly, maybe 15
degrees.  Make yourself up a little guide that will place the slot about
1/8” below the top and establish the angle then cut the slots.  

 

Taper the top edge down to the hinge line as required to get full up
deflection and you’re done.  (Actually you should be able to easily go 90
degrees up deflection with this method, which makes sealing the gap from the
bottom much easier!)  

 

Scott

 

  _____  

From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Paul LaChance
Sent: Sunday, November 11, 2007 10:26 PM
To: NSRCA Mailing List
Subject: [NSRCA-discussion] Top hinging a foam wing

 

Hi all,

 

I asked about top hinging wings a while back and got a couple answers, but
they were for composite wings.  Does anyone know of a site that shows how to
top hinge wings with a foam wing or have any advice on the best way to do
it?  Thanks in advance.  I have seen it on a few wings and really like the
clean look.  

 

Paul LaChance

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