Angel's Shadow - RIP

[Wayne Galligan]

Why not just build a wing with enough internal structure?
How much weight can this really be saving?  This is under engineered in my
opinion.   Is a 9oz wing really sound enough for an 10+lb airplane that is
going to be doing multiple snaps in flight x multiple flights per season?
Maybe I am missing something here about this wing design.  Looks cool but is
it?

Wayne G.

----- Original Message ----- 
From: "Alan Simmonds" <alan at gspceilings.com>
To: <discussion at nsrca.org>
Sent: Tuesday, October 28, 2003 3:10 PM
Subject: RE: Angel's Shadow - RIP


> It's like Sellotape only totally transparent
>
> > Whats diamond tape?
>
> --- Alan Simmonds <alan at gspceilings.com> wrote:
> > I understand its possible to crack the glue joint on
> > the L/E when
> > picking the model up.  The fix is apply diamond tape
> > to the L/E of the
> > wings and the tail (yes, this same fault has
> > manifested on the horzontal
> > stab too!!).  The tape will prevent air entering the
> > wing cavity in the
> > event of a crack and should stop the wing blowing
> > apart.
> >
> > Alan Simmonds
> >
> > -----Original Message-----
> > From: discussion-request at nsrca.org
> > [mailto:discussion-request at nsrca.org]
> > On Behalf Of chadnortheast at shaw.ca
> > Sent: 28 October 2003 14:48
> > To: discussion at nsrca.org
> > Subject: Re: Angel's Shadow - RIP
> >
> >
> > I witnessed this happen to one of the UK team
> > members during official
> > practise at the WC this year.  The left wing panels
> > leading edge
> > separated during the 3rd point of the 3/4 point,
> > 1-1/4 snap manouver in
> > F-03.  At least one of the wing skins was completely
> > separated from the
> > model, and about 10" or so of the wing root was
> > still attached to the
> > fuse.
> >
> > Chad
> >
> > ----- Original Message -----
> > From: Tony Stillman <tony at radiosouthrc.com>
> > Date: Tuesday, October 28, 2003 7:00 am
> > Subject: Re: Angel's Shadow - RIP
> >
> > > Adrian:
> > >
> > > Very sorry to hear about your loss...
> > >
> > > Jason told me that he had heard and seen some of
> > this before, and
> > > it was a
> > > concern.  He had two new airplanes sent to him to
> > use for the WC,
> > > but they
> > > arrived very late (hence, part of the reason for
> > the choice of flying
> > > electric...), he told me.  On of his concerns with
> > his older
> > > models was of
> > > this exact thing.  He was hoping that the new
> > models would have
> > > the problem
> > > solved.
> > >
> > > Tony Stillman
> > > Radio South
> > > 3702 N. Pace Blvd.
> > > Pensacola, FL 32505
> > > 1-800-962-7802
> > > www.radiosouthrc.com
> > > ----- Original Message -----
> > > From: <adriancwong at earthlink.net>
> > > To: <discussion at nsrca.org>
> > > Sent: Tuesday, October 28, 2003 12:49 AM
> > > Subject: Re: Angel's Shadow - RIP
> > >
> > >
> > > I was out flying with my Angel's Shadow this past
> > Saturday. The
> > > plane had
> > > only about 60 flights, and was finally fully
> > trimmed to my liking.
> > > On its
> > > fifth flight of the day, while it was on its down
> > wind trim path,
> > > the left
> > > top and bottom wing panel suddenly separated and
> > ripped apart in
> > > mid air.
> > > The next thing I noticed were the two wing panels
> > floating in mid
> > > air in
> > > slow motion, and the rest of the plane rolling
> > onto the far right
> > > side of
> > > the embankment.
> > >
> > > After I recovered from my initial shock, follow by
> > much cursing in
> > > the pit
> > > area, my friends and I set out to retrieve the
> > wreckage. Following
> > > a ten
> > > minutes search over a large loose dirt area, under
> > the rare
> > > grueling - 95
> > > degrees - October Californian sun, we recovered
> > the two wing
> > > panels. As we
> > > were picking up the wing panels, I remembered
> > noticing a
> > > separation on the
> > > leading edge of the right wing panel a month ago;
> > I had promptly
> > > applied CA
> > > to cure the problem. At that time, there was no
> > visible problem on
> > > the left
> > > wing. However, another friend of mine, who is a
> > fellow Shadow
> > > owner, had
> > > informed me that he had noticed the same
> > separation problem on his
> > > planealso.
> > >
> > > Unfortunately, following an hour of intensive
> > search, with many
> > > cuts by the
> > > tall sage brush, we could not locate the rest of
> > the airplane.
> > > Apparently,there is a huge swamp right next to the
> > tall
> > > embankment. With the tall grass
> > > and weeds covering the entire area, it completely
> > swallowed the
> > > whole plane.
> > > Not only did I lose the airplane, I couldn't even
> > recover a single
> > > piece of
> > > equipment for future use.
> > >
> > > Later on that evening, after much beer pounding to
> > ease my pain, I
> > > think I
> > > finally discovered the main reason for the crash.
> > The first thing
> > > I noticed
> > > was that the wing broke right next to where the
> > wing tube ends.
> > > Apparently,in order to save weight, the
> > manufacturer installed
> > > only three thin foam
> > > spars inside the wing, thus; seriously jeopardize
> > the rigidity of
> > > the wing.
> > > Unfortunately, due to the many snapping maneuvers
> > we have in FAI, it
> > > weakened the integrity of the wing over time.
> > Since there was no
> > > main spar
> > > to support the wing, the area from the end of the
> > wing tube to the
> > > tip of
> > > the wing flexes tremendously. Eventually, it
> > opened up a gap
> > > between the two
> > > wing panels (on the leading edge), and the wind
> > did the rest.
> > >
> > > I have accepted over the years that all planes
> > have an invisible
> > > expirationdate stamped inside. If we keep flying
> > the plane,
> > > something will eventually
> > > happen. But, to lose a relatively new airplane due
> > to manufacturer's
> > > negligence, it's pretty hard to swallow. I
> > sincerely hope this is an
> > > individual case, however, I will strongly urge all
> > Shadow owners to
> > > carefully inspect their airplane.
> > >
> > > I have taken some pictures on the wing panels, if
> > anyone is
> > > interested,please contact me off line.
> > >
> > > Adrian Wong
> > >
> > > Chingbergh Enterprises, Inc.
> > > 1555 Lakeside Drive, Suite # 194,
> > > Oakland, CA 94612
> > > Tel: (510)452-1005
> > > Fax: (510)452-0378
> > > E-mail: info at chingbergh.com
> > > www.chingbergh.com
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
> === message truncated ===
>
>
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