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larry(at)macsmachine.com
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 Posted: Mon Nov 16, 2009 1:29 pm Post subject: spar and wing mods |
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Hi guys,
I believe the issues we see being blamed on piloting and maintenance are
a soft argument as most of us who build and fly are regarded as very
responsible. But, the previous class of 601s had nearly none of the
history of failures exhibited by the latest XL model.
The logical conclusion must be made that the margin of strength, from
fatigue to failure was brought nearer by a changes to a shorter
center-spar, reduced height wing spars, a main spar slightly angled off
from the direction of loading. These are significant changes that can go
without complication for many hours, but might possibly be overcome by
time, max loading, convective air and or minor mishandling of the
aircraft. There may even be a problem with minor variability of
construction affecting this narrower safety margin, but it too would be
very hard to find. It’s still too early to get into a fault finding game.
The RVs had a similar problem with wings occasionally breaking off and
they made a fix that allowed them to survive and continue, painful as it
was.
If I owned an XL, I’d be very happy to make the modifications and accept
the improved strength and original intent of loading. The reported cost
seems very reasonable.
Because the design is the intellectual property of Zenith, I really hope
they are able to survive the legal implications.
Do fly safe guys,
Larry McFarland 601HDS at www.macsmachine.com <http://www.macsmachine.com/>
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tigerrick(at)mindspring.c
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| Posted: Mon Nov 16, 2009 1:57 pm Post subject: spar and wing mods |
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Very well said, Larry! I wish I woulda read yours first before spending the time to write my own!
Rick
do not archive
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Scotsman
Joined: 27 Aug 2007
Posts: 89
Location: Johannesburg, South Africa
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| Posted: Tue Nov 17, 2009 1:38 am Post subject: Re: spar and wing mods |
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ditto
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sabrina
Joined: 15 Jun 2009
Posts: 170
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| Posted: Wed Nov 18, 2009 5:34 pm Post subject: Re: spar and wing mods |
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Do Not Archive
| | - The Matronics Zenith601-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
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Last edited by sabrina on Sun Dec 13, 2009 2:28 pm; edited 3 times in total |
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aussiech650
Joined: 04 Oct 2009
Posts: 25
Location: Sydney, Australia
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| Posted: Thu Nov 19, 2009 12:46 pm Post subject: spar and wing mods |
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Wire Bracing? Why don't we take the starter motor and battery out and go
back to hand starting as well. LMHO.
Regards,
Greg Cox
Zenith Zodiac CH650
Sydney, Australia
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