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saafbusiness(at)gmail.com
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 Posted: Wed Jan 11, 2012 6:12 am Post subject: Wing tanks |
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Hello,
I built my Pulsar in 1994-1996 and it spent most of its time in Utah. I have had it in Florida for 3 years.
Over the last 3 years the paint around the gas cap has blistered some and is getting worse. I can also see some stains developing on the bottom of the tanks and the tank outline around the spar seems to be more noticeable. It is hard to explain, but looks like the tank has shrunk ever so slightly, but it is hard to tell.
It definitely looks like the fuel is having some effect on the tank. My guess is it has something to do with that nasty ethanol as I burn 90% plus auto fuel vs. 100LL. I never had this problem in Utah. I know that autofuel can have up to 10% ethanol by law, but I know the oil industry never had that high of a percentage until recent years.
FYI - I had the quickbuild option from areodesigns, so I didn't build the tank and polysulfide layup, AD did that as part of the kit.
Has anyone else seen this issue with thier tanks ?
Thanks
--
Mark L. Fox
www.slyasafox.com
info(at)slyasafox.com (info(at)slyasafox.com)
1-321-626-4786
www.NestEggSoftware.com
www.DaVinciandthe40answers.com
www.TangentTime.com
Skype: marklfox
Creative Thinking Workshops
Systematic Idea Generation
Word of Mouth Marketing
da Vinci's and the 40 Answers
The One Page Proposal
[quote][b]
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sonja.englert(at)juno.com
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| Posted: Wed Jan 11, 2012 7:42 am Post subject: Wing tanks |
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Mark,
That sounds like the fuel is getting into the tank structure, which is bad news. I have had that in a small spot at the root. I opened the tank, scraped the sealant off, did a layup over the affected area and reapplied sealant. If there is ethanol in the fuel, it must not come directly into contact with the epoxy, as it softens it and eats through it.
Sonja
____________________________________________________________
53 Year Old Mom Looks 33
The Stunning Results of Her Wrinkle Trick Has Botox Doctors Worried
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| | - The Matronics Pulsar-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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rwilhelm(at)dc.rr.com
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| Posted: Wed Jan 11, 2012 9:28 am Post subject: Wing tanks |
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Mark,
I used Superfil and UV Smooth Prime by Poly-Fiber when I built my III in 1997-1999. Originally the surfaces were perfect before I had the plane painted with Emeron. Now the Tank outline is very definite, as is the fiberglass weave in the rest of the plane.
I would never recommend the product.
Ray Pulsar III/3300
From: owner-pulsar-list-server(at)matronics.com [mailto:owner-pulsar-list-server(at)matronics.com] On Behalf Of Mark Fox
Sent: Wednesday, January 11, 2012 6:11 AM
To: pulsar-list(at)matronics.com
Subject: Wing tanks
Hello,
I built my Pulsar in 1994-1996 and it spent most of its time in Utah. I have had it in Florida for 3 years.
Over the last 3 years the paint around the gas cap has blistered some and is getting worse. I can also see some stains developing on the bottom of the tanks and the tank outline around the spar seems to be more noticeable. It is hard to explain, but looks like the tank has shrunk ever so slightly, but it is hard to tell.
It definitely looks like the fuel is having some effect on the tank. My guess is it has something to do with that nasty ethanol as I burn 90% plus auto fuel vs. 100LL. I never had this problem in Utah. I know that autofuel can have up to 10% ethanol by law, but I know the oil industry never had that high of a percentage until recent years.
FYI - I had the quickbuild option from areodesigns, so I didn't build the tank and polysulfide layup, AD did that as part of the kit.
Has anyone else seen this issue with thier tanks ?
Thanks
--
Mark L. Fox
www.slyasafox.com
info(at)slyasafox.com (info(at)slyasafox.com)
1-321-626-4786
www.NestEggSoftware.com
www.DaVinciandthe40answers.com
www.TangentTime.com
Skype: marklfox
Creative Thinking Workshops
Systematic Idea Generation
Word of Mouth Marketing
da Vinci's and the 40 Answers
The One Page Proposal
| Quote: | | http://www.matronics.com/Navigator?Pulsar-List |
01234567
[quote][b]
| | - The Matronics Pulsar-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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barrynorman(at)comcast.ne
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| Posted: Wed Jan 11, 2012 9:38 am Post subject: Wing tanks |
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Mark,
My plane had fast built wings and was serial # 563. I've noticed the same thing around the spars that showed up slowly over time but there seems to be no apparent problem with the grey sealer used on the inside of the tanks. My guess is the Hysol shrank over time due to the exposure to fuel and causes the distortion your seeing around the spar. It only occurs where it comes in contact with the fuel. I'm not sure that it's related to the ethanol but it seems to have stopped shrinking over the past year or two. My plane has been completed for six years. I believe the earlier Pulsars used a different tank sealer that was more cream colored and may be more affected by the ethanol.
My plan is to remove the wings one day and check out the tanks and spar. If everything is ok then redo the body work around the affected areas and repaint.
Barry
From: "Mark Fox" <saafbusiness(at)gmail.com>
To: pulsar-list(at)matronics.com
Sent: Wednesday, January 11, 2012 9:11:02 AM
Subject: Wing tanks
Hello,
I built my Pulsar in 1994-1996 and it spent most of its time in Utah. I have had it in Florida for 3 years.
Over the last 3 years the paint around the gas cap has blistered some and is getting worse. I can also see some stains developing on the bottom of the tanks and the tank outline around the spar seems to be more noticeable. It is hard to explain, but looks like the tank has shrunk ever so slightly, but it is hard to tell.
It definitely looks like the fuel is having some effect on the tank. My guess is it has something to do with that nasty ethanol as I burn 90% plus auto fuel vs. 100LL. I never had this problem in Utah. I know that autofuel can have up to 10% ethanol by law, but I know the oil industry never had that high of a percentage until recent years.
FYI - I had the quickbuild option from areodesigns, so I didn't build the tank and polysulfide layup, AD did that as part of the kit.
Has anyone else seen this issue with thier tanks ?
Thanks
--
Mark L. Fox
www.slyasafox.com
info(at)slyasafox.com (info(at)slyasafox.com)
1-321-626-4786
www.NestEggSoftware.com
www.DaVinciandthe40answers.com
www.TangentTime.com
Skype: marklfox
Creative Thinking Workshops
Systematic Idea Generation
Word of Mouth Marketing
da Vinci's and the 40 Answers
The One Page Proposal
[quote]
[b]
| | - The Matronics Pulsar-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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n345js(at)verizon.net
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| Posted: Thu Jan 12, 2012 3:58 pm Post subject: Wing tanks |
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Mark- my Pulsar XP kit is same age as yours, was delivered in December 1994. Is SN 276 and has been flying since 2000. Have used mostly autogas and has had 5% ethanol since FL required it a few years ago. I found a non-ethanol supplier a few months ago so now use that. Only visible problem with wing tanks is cracks in paint under one wing, but I don't think that is fuel related.
I'm in Sarasota, FL, where are you?
John Schussler
Puilsar XP N345JS
[quote] ---
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kdpalmer(at)mweb.co.za
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| Posted: Thu Jan 12, 2012 4:44 pm Post subject: Wing tanks |
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There is a mandatory mode, to prevent the stress cracks under the wing, on either side of the spar, developing.
[quote] ---
| | - The Matronics Pulsar-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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ccoulter(at)wavecable.com
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| Posted: Fri Jan 13, 2012 9:28 am Post subject: Wing tanks |
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On Wed, 11 Jan 2012 09:11:02 -0500
Mark Fox <saafbusiness(at)gmail.com> wrote:
| Quote: | Hello,
I built my Pulsar in 1994-1996 and it spent most of its
time in Utah. I
have had it in Florida for 3 years.
Over the last 3 years the paint around the gas cap has
blistered some and
is getting worse. I can also see some stains developing
on the bottom of
the tanks and the tank outline around the spar seems to
be more noticeable.
It is hard to explain, but looks like the tank has
shrunk ever so slightly,
but it is hard to tell.
It definitely looks like the fuel is having some effect
on the tank. My
guess is it has something to do with that nasty ethanol
as I burn 90% plus
auto fuel vs. 100LL. I never had this problem in Utah.
I know that
autofuel can have up to 10% ethanol by law, but I know
the oil industry
never had that high of a percentage until recent years.
FYI - I had the quickbuild option from areodesigns, so I
didn't build the
tank and polysulfide layup, AD did that as part of the
kit.
Has anyone else seen this issue with thier tanks ?
Thanks
--
Mark L. Fox
www.slyasafox.com
info(at)slyasafox.com
1-321-626-4786
www.NestEggSoftware.com
<http://www.nesteggsoftware.com/>
www.DaVinciandthe40answers.com
<http://www.davinciandthe40answers.com/>
www.TangentTime.com <http://www.tangenttime.com/>
Skype: marklfox
Creative Thinking Workshops
Systematic Idea Generation
Word of Mouth Marketing
da Vinci's and the 40 Answers
The One Page Proposal
|
Mark
I too have blistering on my left wing filler. I think
it's because I failed to etch the aluminum ring before
painting.
Clarke
| | - The Matronics Pulsar-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:
http://www.matronics.com/Navigator?Pulsar-List |
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