Angel's Shadow - RIP

[Dean Pappas]

Hi Lance,
Please pardon the structures lesson: I'm sure you know this already.
There is a compression buckle that naturally results from abruptly 
ending the spar (or spar-like structure) at the end of the wing tube.
The top and bottom skins will try to meet at some distance out from the
end of the hard structure. That buckle will also try to pinch the
leading edge flat, cracking the glue joint. A balsa leading edge
filler or even a wimpy little vertical web a half an inch behind
the LE stops the pinching. I prefer the filler, 'cause it adds gluing area.
I'll bet that a spar extension to just beyond the servo box would
render the wings bullet-proof. Hey we builds 'em lighter and
lighter 'till they break; and then we back up one step ... 
Regards to All
	Dean

-----Original Message-----
From: Lance Van Nostrand [mailto:patterndude at comcast.net]
Sent: Tuesday, October 28, 2003 11:08 PM
To: discussion at nsrca.org
Subject: Re: Angel's Shadow - RIP


The upper and lower skins are butt glued.  This is not intrinsic to the
technology.  Rev Pro is the same.  A balsa leading edge is needed, or like a
pylon racer, the LE needs to be sharper so it can be filled with epoxy.
--Lance

----- Original Message ----- 
From: "Atwood, Mark" <atwoodm at paragon-inc.com>
To: <discussion at nsrca.org>
Sent: Tuesday, October 28, 2003 7:29 PM
Subject: RE: Angel's Shadow - RIP


You're probably right.  I haven't raced in years, and when I did it was
quickie and locally.  But I have a few of the composite racers and they're
very light and VERY strong.  My point was simply that the technology is not
terribly new, and has been well proven in many other applications...so I'm
guessing...just guessing that there is a design or manufacturing flaw,
rather than something intrinsic to the technology.

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