Today's Message Index:
----------------------
0. 12:07 AM - List Fund Raiser (Matt Dralle)
1. 04:43 AM - Zenith test results (mhubel)
2. 05:05 AM - Re: Zenith test results "fractures or immediate" (fritz)
3. 06:59 AM - XL center section strength (was: Zenith test results) (Peter Chapman)
4. 07:15 AM - Grove gear (BobbyPaulk@comcast.net)
5. 09:20 AM - Re: Grove gear (fritz)
6. 01:04 PM - Re: 601XL down in Arkansas (swater6)
7. 04:53 PM - Re: Zenith 601/650 Upgrades, Grove Gear Mod (Rick Lindstrom)
8. 08:53 PM - Re: Zenith test results "fractures or immediate" (Ron Lendon)
Message 0
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | List Fund Raiser |
Dear Listers,
Just a reminder that November is the Matronics Email List Fund Raiser month. There
are some very nice incentive gifts to choose from as well!
Please make your Contribution today:
http://www.matronics.com/contribution
Thank you!
Matt Dralle
Matronics Email List Administrator
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Zenith test results |
I wonder if anyone has a different reading on this. It seems that the only weak
point anyone could really point out from the tests that Zenith had done was that
at 6+G force, the main wing bolts and their holes were damaged although none
failed.
With all the upgrade issues, shouldn't this be addressed? One could use higher
grade bolts and a steel doubler plate or thick washers under the bolts. Then a
much higher torque could be used and more of the stress could be transferred
to the surface of the spar itself.
Does anyone know what the difference in strength numbers would be for this arrangement?
--------
Mark Hubelbank
N708HU
CH601XL
Jabiru 3300
Rotec TBI 40 carb
Sensenich ground adj prop.
41 hr TAF
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=272293#272293
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Zenith test results "fractures or immediate" |
food for thought---- regardless of why the XL had wing failures, whether it
was from "aileron flutter", incorrect design or what have you-----------Has
any mention to the wing failures being "immediate" ( meaning one minute your
wings are 100% fine and the next you have a failed wing) or is the failure
caused by a build of "fractures" occuring in the wing over a given period of
time caused by different circumstances?
Therefore, could there be structure damage "fractures" to wings to those
airplanes that have been flying?
Fritz-------- do not archive
----- Original Message -----
From: "mhubel" <mhubel@nemon.com>
Sent: Wednesday, November 11, 2009 7:42 AM
Subject: Zenith601-List: Zenith test results
>
> I wonder if anyone has a different reading on this. It seems that the only
> weak point anyone could really point out from the tests that Zenith had
> done was that at 6+G force, the main wing bolts and their holes were
> damaged although none failed.
>
> With all the upgrade issues, shouldn't this be addressed? One could use
> higher grade bolts and a steel doubler plate or thick washers under the
> bolts. Then a much higher torque could be used and more of the stress
> could be transferred to the surface of the spar itself.
>
> Does anyone know what the difference in strength numbers would be for this
> arrangement?
>
> --------
> Mark Hubelbank
> N708HU
> CH601XL
> Jabiru 3300
> Rotec TBI 40 carb
> Sensenich ground adj prop.
> 41 hr TAF
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=272293#272293
>
>
>
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | XL center section strength (was: Zenith test results) |
At 07:42 11-11-09, you wrote:
>I wonder if anyone has a different reading on this. It seems that
>the only weak point anyone could really point out from the tests
>that Zenith had done was that at 6+G force, the main wing bolts and
>their holes were damaged although none failed.
Technically that meets the specs. At Ultimate load, permanent
deformation is allowed. The plane can get bent but has to stay together.
Whether one wants to see more margin in that area, that's another
matter. (As you brought up.)
Mind you, there is some beefing up in the "ZU" upgrade package. I'm
hazy on how all the spar and center section parts fit together, but
there are doublers added to the spar roots, and to the center section
spar where it joins the wing spars. Also, a few extra bolts hold
those doublers on, and the main wing spar bolts are lengthened. So
the bolts will have loads distributed across a greater area which may help.
Peter Chapman
Toronto, ON 601 HDS / 912 / C-GZDC
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
Rick,
i would be interested in the Grove gear for 2 reasons. I installed my gear per
the picture in the instructions which was wrong and it put my CG to far aft at
low fuel and heavy load. i would like to get the lighter gear and move the CG
in relation to the wheels so i could rotate sooner and hold the nose off on landing.
picking up 15 lbs would be secondary.
do you know what is involved in changing out the gear and what parts will be needed
& $$. is it a simple swap out?
is the bolt holes for the axles pre drilled.
thanks
bobby
do not archive!
Message 5
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
Rick--- isn't your explanation backwards (opposite) from what you want
to accomplish?
Fritz do not archive
----- Original Message -----
From: BobbyPaulk@comcast.net
To: zenith601-list@matronics.com
Sent: Wednesday, November 11, 2009 10:13 AM
Subject: Zenith601-List: Grove gear
Rick,
i would be interested in the Grove gear for 2 reasons. I installed my
gear per the picture in the instructions which was wrong and it put my
CG to far aft at low fuel and heavy load. i would like to get the
lighter gear and move the CG in relation to the wheels so i could rotate
sooner and hold the nose off on landing. picking up 15 lbs would be
secondary.
do you know what is involved in changing out the gear and what parts
will be needed & $$. is it a simple swap out?
is the bolt holes for the axles pre drilled.
thanks
bobby
do not archive!
Message 6
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: 601XL down in Arkansas |
FYI-
http://www.ntsb.gov/ntsb/brief.asp?ev_id 091107X34009&key=1
NTSB Identification: CEN10FA042
14 CFR Part 91: General Aviation
Accident occurred Friday, November 06, 2009 in Agnos, AR
Aircraft: ZENITH AIRCRAFT CO ZODIAC 601, registration: N538CJ
Injuries: 1 Fatal.
This is preliminary information, subject to change, and may contain errors. Any
errors in this report will be corrected when the final report has been completed.
On November 6, 2009, approximately 1100 central standard time, a Zenith Aircraft
Company Zodiac 601XL, N538CJ, experimental light sport airplane, was destroyed
when it impacted terrain, following an in-flight breakup 1.5 miles south of
Agnos, Arkansas. Visual meteorological conditions prevailed at the time of the
accident. The personal flight was being conducted under the provisions of Title
14 Code of Federal Regulations Part 91 without a flight plan. The sport pilot
was fatally injured. The cross-country flight departed Sharp County Regional
Airport (KCVK), Ash Flat, Arkansas, approximately 0930.
According to the Arkansas State Police, the pilot departed KCVK approximately 0930
and was en route, either to Flippin or Mountain View, Arkansas, with the intention
of returning to KCVK no later than 1200. A local rancher located the
wreckage in a field approximately 1230.
The debris field was scattered over 600 feet on a magnetic bearing of 35 degrees.
The right wing assembly initiated the debris field, coming to rest in a pond.
The left wing assembly came to rest approximately 200 feet from the right wing.
The left wing spar, left wing fuel tank, various cockpit items, and personal
effects were located in the debris field. The fuselage, empennage, engine,
and propeller assembly came to rest, inverted, approximately 600 feet from the
right wing. There were no ground scars identified between the right wing and
the main wreckage that could be associated with the left or right wing, empennage,
or fuselage.
The wreckage was recovered and relocated to a facility in Clinton, Arkansas, for
further examination.
--------
601 XL kit N596SW reserved
Tail, control surfaces and both wings complete. Now working on fuselage
www.scottwaters.com
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=272354#272354
Message 7
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Zenith 601/650 Upgrades, Grove Gear Mod |
Hi, Gang!
I just had a good conversation with Sebastien at Zenith, and got a bit more information
that might be helpful when making decisions about the upcoming upgrades
to the Zenith 601/650 series.
First, Sebastien estimates that the full upgrade kit will run approximately $300,
not including shipping. This represents Zenith's costs in materials alone,
including hardware.
Second, Zenith estimates that the net weight increase will average between 5 and
6 pounds, once the old fasteners are removed, new components are installed,
and new fasteners are replaced.
Third, they've already started a blog with photos and video on "how to" accomplish
the upgrade. As you can imagine, this is an ongoing work in progress, so it's
being updated on a periodic basis. And yes, you can post your comments to
Zenith as well. Here'e the link:
http://www.zenith.aero/profiles/blogs/installing-the-upgrade-package
Personally speaking, 5 or 6 pounds is a lot less than I was imagining after looking
at the drawings, so maybe there's a bit less pressure to install the lighter
weight Grove gear. On the other hand, I can't think of a better time to do
it and get 10 more pounds of useful load, so I'm going to keep looking into the
logistics of a group buy. As has been posted previously here, the Grove gear
lists for $1347, and gun drilled brake lines adds another $100 per gear leg.
Robbie Grove said we could expect a 10 to 15 percent discount off of list if
we got 10 or so buyers together.
Don't forget that installing the Grove gear requires an adapter block to allow
the narrower Grove gear to fit snugly in the existing gear channel, and this is
manufactured by Zenair in Canada. I missed talking to them about cost and availability
earlier today, but will follow up tomorrow.
Frankly, I think this is all good news from Zenith, and they deserve a lot of credit
for delivering an enhancement that really strengthens the airframe, and
will give us enhanced peace of mind while flying. Kudos to Chris and sons for
stepping up to the challenge, and keeping the cost down to a bare minimum.
And before I forget, a big THANK YOU! to all of the veteran and current servicemen
and women in our Zenith family! Without their sacrifices, we would not have
the freedoms we take for granted today. Building and flying your own airplane
would be nothing more than a fanciful dream...
Rick Lindstrom
Zenvair 601 N42KP
...and proud parent of a US Marine.
Message 8
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | 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
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|