Today's Message Index:
----------------------
1. 02:28 AM - Re: Re: Zenith test results "fractures or immediate" (Terry Turnquist)
2. 05:32 AM - The Zenith "How to" pictures and Blog (Frank Derfler)
3. 10:10 AM - Re: Zenith test results "fractures or immediate" (Scotsman)
4. 04:07 PM - Re: Re: Zenith test results "fractures or immediate" (ernie)
5. 09:40 PM - Re: update on the CH601XL--- REQUIRED MODs (Terry Phillips)
6. 11:04 PM - Part 3: drilling out the spar rivets (picture of upgrade kit included) (Craig Payne)
Message 1
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| Subject: | Re: Zenith test results "fractures or immediate" |
Ron, what you say is true, but why is this airplane the only home built that the
wings rip off on a regular basis? XL pilots as a group must be the worlds worst
pilots! Maybe we all need a personality test to make sure we all don't have
a death wish.
Terry Turnquist
----- Original Message ----
From: Ron Lendon <rlendon@comcast.net>
Sent: Wed, November 11, 2009 10:52:57 PM
Subject: Zenith601-List: Re: Zenith test results "fractures or immediate"
There very well could be if the airframe has been stressed beyond its limits.
--------
Ron Lendon, Clinton Township, MI
WW Corvair with Roy's Garage 5th bearing
Zodiac XL, ScrapBuilder ;-)
http://www.mykitlog.com/rlendon
Corvair Engine Prints:
http://home.comcast.net/~rlendon/site/
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=272400#272400
Message 2
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| Subject: | The Zenith "How to" pictures and Blog |
The "How to" pictures, video, and blog started by Zenith is a huge step in
the rehabilitation of the brand and the community. More! More!
http://www.zenith.aero/profiles/blogs/installing-the-upgrade-package?id=2606393:BlogPost:37208&page=2#comments
Frank Derfler
300 Happy Hours in my 601XL
See my new Novel, "A Glint in Time" at http://GreatGuyBooks.com.
See my discussion of All the Guy Toys that aren't (clearly) illegal or
(blatantly) immoral at http://mostlyflying.com
Anybody who READS (anybody out there?) See www.greatguybooks.com
Message 3
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| Subject: | Re: Zenith test results "fractures or immediate" |
Spot on Terry...surely by now the doubters on the list have to admit that regardless
of the root cause (flutter, poor construction, poor piloting) that there
is a strange tendency for the XL have fatal wing issues that are not mirrored
by other homebuilts. Which has to mean that XL builders/pilots etc are statistically
worst pilots/builders....unless of course there is a design issue..god
forbid as the one common factor is the aircraft.
If we see anymore wing loss incidents when arguably the XL pilots are wholly sensitised
to flutter, pitch sensitivity, cable tension etc and thus significantly
less likely to exceed the design limits the maybe it is a latent design problem.
It is interesting to note the wreckage distribution of the latest crash
in the abovementioned period which speaks of in flight structural failure for
unknown reasons.
Let's just accept that there is a problem and implement the changes.
James
--------
Cell +27 83 675 0815
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=272466#272466
Message 4
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| Subject: | Re: Zenith test results "fractures or immediate" |
http://www.aaib.gov.uk/cms_resources.cfm?file=/Zenair%20CH601UL,%20G-YOXI%2005-07.pdf
Old report maybe this will answer some questions
do not archive
On Thu, Nov 12, 2009 at 5:28 AM, Terry Turnquist <ter_turn@yahoo.com> wrote:
>
> Ron, what you say is true, but why is this airplane the only home built that
the wings rip off on a regular basis? XL pilots as a group must be the worlds
worst pilots! Maybe we all need a personality test to make sure we all don't have
a death wish.
>
> Terry Turnquist
>
>
> ----- Original Message ----
> From: Ron Lendon <rlendon@comcast.net>
> To: zenith601-list@matronics.com
> Sent: Wed, November 11, 2009 10:52:57 PM
> Subject: Zenith601-List: Re: Zenith test results "fractures or immediate"
>
>
> There very well could be if the airframe has been stressed beyond its limits.
>
> --------
> Ron Lendon, Clinton Township, MI
> WW Corvair with Roy's Garage 5th bearing
> Zodiac XL, ScrapBuilder ;-)
> http://www.mykitlog.com/rlendon
> Corvair Engine Prints:
> http://home.comcast.net/~rlendon/site/
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=272400#272400
>
>
Message 5
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| Subject: | Re: update on the CH601XL--- REQUIRED MODs |
Rick
If you are serious about looking at an alternative landing gear to save
some weight, why go half way? The composite gear used by CZAW on the
European 601XL's is made in a 600kg version. See:
http://www.comlet.cz/index.php?option=com_content&view=article&id=58&Itemid=61&lang=en
type NK-03A-600
A few months ago we were quoted a price for the 600 kg version of $495 plus
shipping.
The weight is given as 5.2 kg (11.4 lb). Compare that to the 46 lb Zenair
gear. It doesn't solve the brake line problem like the Grove gear. But with
~34 lb additional useful load, who cares? My understanding is that the gear
has to be ordered through ACS.
A new gear support would be needed.
If you are interested in getting together a group order for the composite
gear, let me know. ~35 lb and only 500 bucks, now that's attactive.
Terry
At 01:00 PM 11/10/2009 -0500, Rick Lindstrom wrote:
>Hi, Gang!
>
>Like so many others here, I'm contemplating ripping apart my QB 601XL to
>install the suggested mods, and am considering what the positives and
>negatives will be.
>
>Of course, I'm thrilled at the prospect of restoring some of the value to
>design, as well as silencing that nagging fear of airframe failure in the
>back of my head. I've said all along that I'd love a beefier, more
>G-tolerant airframe to increase the margin of safety. (I've flown enough
>cross country to experience sudden clear air turbulence that has bounced
>my head off of the canopy, and I can easily imagine how a 601 or 650 might
>have its G load limits exceeded through no fault of the pilot.)
>
>One of things I'm NOT thrilled about is the additional weight these mods
>will add to the empty weight. So I called up Robbie Grove this morning,
>and he said that if we got enough guys together to place a group order for
>his lightweight, gun-drilled main gear, he could probably knock off 10 to
>20 percent of the price. If you're not familiar with the Grove gear for
>the 601, it saves about 15 pounds over the stock gear while eliminating
>exterior brake lines to the calipers. Really slick.
>
>Robbie said he needs a minimum of ten orders. Anyone else interested in this?
>
>Rick Lindstrom
>ZenVair 601XL N42KP
Message 6
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| Subject: | Part 3: drilling out the spar rivets (picture of upgrade |
kit included)
Here is a link to the latest installment:
http://www.zenith.aero/profiles/blogs/part-3-installing-the-upgrade
There is a picture of "most" of the upgrade kit towards the bottom. I've
attached a copy and here is a link to the picture:
http://tinyurl.com/yd3fwso
-- Craig
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