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frank.goodnight(at)att.ne
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 Posted: Tue Nov 16, 2010 12:36 pm Post subject: cracked rear spar tube firestar |
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Hi All,
My firestar 2 with HKS engine is aproching 200 hrs.
This morning I found a 2in crack in both sides of the 1in square tube that the wing fold fitting
bolts onto--- The carry through tube for the rear spar--- the crack is right below the rear engine mounts.
It is on the top forward edge of the 1 in square tube , all the way through the wall of the tube. after I thought
I saw a crack I used dye penatrant -----no doubt there is a crack on both sides of the air plane.
If any of the other HKS users has a simular crack and maybe knows what would be a good fix, please
E mail me or the list. Thanks
Frank Goodnight
Firestar 2
Hks engine 200 hrs
Brownsville . tx Ph 956 542 1003
[quote][b]
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rickofudall
Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
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| Posted: Tue Nov 16, 2010 12:44 pm Post subject: cracked rear spar tube firestar |
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Frank, Did you get any pictures?
Rick Girard
On Tue, Nov 16, 2010 at 2:25 PM, frank goodnight <frank.goodnight(at)att.net (frank.goodnight(at)att.net)> wrote:
| Quote: | Hi All,
My firestar 2 with HKS engine is aproching 200 hrs.
This morning I found a 2in crack in both sides of the 1in square tube that the wing fold fitting
bolts onto--- The carry through tube for the rear spar--- the crack is right below the rear engine mounts.
It is on the top forward edge of the 1 in square tube , all the way through the wall of the tube. after I thought
I saw a crack I used dye penatrant -----no doubt there is a crack on both sides of the air plane.
If any of the other HKS users has a simular crack and maybe knows what would be a good fix, please
E mail me or the list. Thanks
Frank Goodnight
Firestar 2
Hks engine 200 hrs
Brownsville . tx Ph 956 542 1003
| Quote: |
_blank">www.aeroelectric.com
.com" target="_blank">www.buildersbooks.com
="_blank">www.homebuilthelp.com
_blank">http://www.matronics.com/contribution
get="_blank">http://www.matronics.com/Navigator?Kolb-List
tp://forums.matronics.com
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--
Zulu Delta
Kolb Mk IIIC
582 Gray head
4.00 C gearbox
3 blade WD
Thanks, Homer GBYM
It is not bigotry to be certain we are right; but it is bigotry to be unable to imagine how we might possibly have gone wrong.
- G.K. Chesterton
[quote][b]
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The smallest miracle right in front of you is enough to make you happy.... |
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mdnanwelch7(at)hotmail.co
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| Posted: Tue Nov 16, 2010 12:54 pm Post subject: cracked rear spar tube firestar |
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If any of the other HKS users has a simular crack and maybe knows what would be a good fix, please
E mail me or the list. Thanks
Frank Goodnight
Frank,
With cracks such as you describe, I would think the factory ought to weigh in on your repair, for
two reasons. First, to make sure you get it fixed correctly so that it doesn't happen again. Second,
to consider sending an official A/D (airworthiness directive) out to all Kolb A/C owners to inspect for
similar cracks.
Could you take a couple of pictures of these cracks, and share them with the rest of us?
Mike Welch
MkIII
[quote][b]
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frank.goodnight(at)att.ne
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| Posted: Tue Nov 16, 2010 1:12 pm Post subject: cracked rear spar tube firestar |
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MIke,
can,t send pic. but did talk with Travis and Bryan --they said Denis will be in Thursday and they
will put thrir heads togeather then and let us know something.so far Travis or Bryn have never had
this problem.
Frank
From: Mike Welch <mdnanwelch7(at)hotmail.com>
To: kolb-list(at)matronics.com
Sent: Tue, November 16, 2010 2:52:39 PM
Subject: RE: cracked rear spar tube firestar
If any of the other HKS users has a simular crack and maybe knows what would be a good fix, please
E mail me or the list. Thanks
Frank Goodnight
Frank,
With cracks such as you describe, I would think the factory ought to weigh in on your repair, for
two reasons. First, to make sure you get it fixed correctly so that it doesn't happen again. Second,
to consider sending an official A/D (airworthiness directive) out to all Kolb A/C owners to inspect for
similar cracks.
Could you take a couple of pictures of these cracks, and share them with the rest of us?
Mike Welch
MkIII
[quote]ww========================
[b]
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mdnanwelch7(at)hotmail.co
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| Posted: Tue Nov 16, 2010 1:23 pm Post subject: cracked rear spar tube firestar |
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MIke,
can,t send pic. but did talk with Travis and Bryan --they said Denis will be in Thursday and they
will put thrir heads togeather then and let us know something.so far Travis or Bryn have never had
this problem.
Frank
Frank,
Sounds like you're on the right track!! Fortunately you found the
problem before any further damage was done, and there's NO doubt
Denis will get it figured out and get you on the correct path to get
it fixed good as new (or better).
Mike W
[quote][b]
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rickofudall
Joined: 19 Sep 2009
Posts: 1392
Location: Udall, KS, USA
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| Posted: Wed Nov 17, 2010 11:12 am Post subject: cracked rear spar tube firestar |
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Mark, Since there is no such thing as an airworthiness directive (AD) for an experimental aircraft and the braces for the motor mount on Frank's airframe are apparently not standard Firestar, either, not to worry. All TNK can do is issue a heads up and it will be up to owners and maintenance people to try and nip this one in the bud.
Rick Girard
On Wed, Nov 17, 2010 at 10:30 AM, Mark Anliker <kitfoxmark(at)gmail.com (kitfoxmark(at)gmail.com)> wrote:
| Quote: |
Was the Firestar airframe designed to have an HKS bolted on to it? Did the Kolb Company ever support/recommend an HKS installation on the Firestar airframe? If the answer to both of those questions is "no", I vote “no” for suggesting we sound the AD alarm and create a significant burden for a company we all would like to see prosper. I vote "yes", however, for builders/experimenters discussing in this forum their challenges and proposed solutions when choosing to install and operate alternative engines (with different weight and vibration characteristics) on their experimental aircraft. | Quote: |
_blank">www.aeroelectric.com
.com" target="_blank">www.buildersbooks.com
="_blank">www.homebuilthelp.com
_blank">http://www.matronics.com/contribution
get="_blank">http://www.matronics.com/Navigator?Kolb-List
tp://forums.matronics.com
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--
Zulu Delta
Kolb Mk IIIC
582 Gray head
4.00 C gearbox
3 blade WD
Thanks, Homer GBYM
It is not bigotry to be certain we are right; but it is bigotry to be unable to imagine how we might possibly have gone wrong.
- G.K. Chesterton
[quote][b]
| | - The Matronics Kolb-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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_________________
The smallest miracle right in front of you is enough to make you happy.... |
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slyck(at)frontiernet.net
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| Posted: Wed Nov 17, 2010 11:50 am Post subject: cracked rear spar tube firestar |
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I would reweld the cracks and add vertical gussets.BB
On 17, Nov 2010, at 2:09 PM, Richard Girard wrote:
[quote]Mark, Since there is no such thing as an airworthiness directive (AD) for an experimental aircraft and the braces for the motor mount on Frank's airframe are apparently not standard Firestar, either, not to worry. All TNK can do is issue a heads up and it will be up to owners and maintenance people to try and nip this one in the bud.
Rick Girard
On Wed, Nov 17, 2010 at 10:30 AM, Mark Anliker <kitfoxmark(at)gmail.com (kitfoxmark(at)gmail.com)> wrote:
| Quote: | Was the Firestar airframe designed to have an HKS bolted on to it? Did the Kolb Company ever support/recommend an HKS installation on the Firestar airframe? If the answer to both of those questions is "no", I vote “no” for suggesting we sound the AD alarm and create a significant burden for a company we all would like to see prosper. I vote "yes", however, for builders/experimenters discussing in this forum their challenges and proposed solutions when choosing to install and operate alternative engines (with different weight and vibration characteristics) on their experimental aircraft.
| Quote: |
_blank">www.aeroelectric.com
.com" target="_blank">www.buildersbooks.com
="_blank">www.homebuilthelp.com
_blank">http://www.matronics.com/contribution
get="_blank">http://www.matronics.com/Navigator?Kolb-List
tp://forums.matronics.com
|
|
--
Zulu Delta
Kolb Mk IIIC
582 Gray head
4.00 C gearbox
3 blade WD
Thanks, Homer GBYM
It is not bigotry to be certain we are right; but it is bigotry to be unable to imagine how we might possibly have gone wrong.
- G.K. Chesterton
| Quote: |
href="http://www.aeroelectric.com/">www.aeroelectric.com
href="http://www.buildersbooks.com/">www.buildersbooks.com
href="http://www.homebuilthelp.com/">www.homebuilthelp.com
href="http://www.matronics.com/contribution">http://www.matronics.com/contribution
href="http://www.matronics.com/Navigator?Kolb-List">http://www.matronics.com/Navigator?Kolb-List
href="http://forums.matronics.com/">http://forums.matronics.com
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[b]
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Richard Pike
Joined: 09 Jan 2006
Posts: 1671
Location: Blountville, Tennessee
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| Posted: Wed Nov 17, 2010 1:56 pm Post subject: Re: cracked rear spar tube firestar |
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I agree that the factory wil probably come up with the best solution for the HKS installation. When we put the 582 on the FSII, the factory felt that it was too much torque for the FSII upper fuselage structure, so we added some external reinforcements to take the torque loads.
This is probably overkill, but on the other hand, this was one of the few portions of the fuselage structure that did not get distorted in the crash...
More info here: http://www.bcchapel.org/pages/0003/582%20Mods.html
Richard Pike
MKIII N420P (420ldPoops)
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