Matronics Email Lists Forum Index Matronics Email Lists
BBS Forum Interface to the Matronics Email Lists
 
 Get Email Distribution Too!Get Email Distribution Too!    FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

fuel seepage
Goto page Previous  1, 2
 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> KIS-List
View previous topic :: View next topic  
Author Message
lgdavid(at)roadrunner.com
Guest





PostPosted: Fri Oct 22, 2010 10:31 am    Post subject: fuel seepage Reply with quote

Scott, I hear that! and would add if the fuel is gasohol, things will come unglued like they did with my plane where the gasohol leached into the spar box and weakened it. Larry
[quote] ---


- The Matronics KIS-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?KIS-List
Back to top
kentpyle(at)iland.net
Guest





PostPosted: Fri Oct 22, 2010 3:42 pm    Post subject: fuel seepage Reply with quote

Scott, I hope someone has the answer. I too, have had fuel seepage. I too, have coated the interior of the wing with sealer, four coats on the flat areas of the wing and eight coats in the corners. Kent
[quote] ---


- The Matronics KIS-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?KIS-List
Back to top
ftyoder(at)yoderbuilt.com
Guest





PostPosted: Fri Oct 22, 2010 4:52 pm    Post subject: fuel seepage Reply with quote

I don't have my Builders Manual with me, and it has been since the mid 90's that I built the wings on my TR-1, but I recall that we were to coat the interior of the tank with a fairly thick coat of epoxy to make the tank. It did not call for using a sealer, i.e.. Jefco. Did those of you with seeps use the extra coats of epoxy prior to the sealer? The extra epoxy coat is all I used.
Tim
[quote] ---


- The Matronics KIS-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?KIS-List
Back to top
sstearns2(at)yahoo.com
Guest





PostPosted: Fri Oct 22, 2010 10:13 pm    Post subject: fuel seepage Reply with quote

Hi Kent... It is comforting to know others have had fuel seepage. Scott

--- On Fri, 10/22/10, kent pyle <kentpyle(at)iland.net> wrote:
[quote]
From: kent pyle <kentpyle(at)iland.net>
Subject: Re: fuel seepage
To: kis-list(at)matronics.com
Date: Friday, October 22, 2010, 4:38 PM

Scott, I hope someone has the answer.  I too, have had fuel seepage. I too, have coated the interior of the wing with sealer, four coats on the flat areas of the wing and eight coats in the corners. Kent
[quote] ---


- The Matronics KIS-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?KIS-List
Back to top
sstearns2(at)yahoo.com
Guest





PostPosted: Fri Oct 22, 2010 10:22 pm    Post subject: fuel seepage Reply with quote

I used the jeffco stuff and have fuel seepage. The jeffco stuff is an epoxy and is supposed to be resistant to more things then the kit epoxy. I think I had some fantacy of being able to use autofuel which you can never really trust not to have ethanol.

I also worked the jeffco stuff into the weave with a sqeege quite a bit before painting on two coats. I think where it's probably getting out is where I masked off the bottom skin for bonding onto the ribs and spar and there are probably some small areas the adhesive didn't cover. After pouring fuel onto the scrap laminate it obvious that it would only take a small area for the fuel to seep into the core and then start looking for a way out.

Scott

--- On Fri, 10/22/10, F. Tim Yoder <ftyoder(at)yoderbuilt.com> wrote:

[quote]
From: F. Tim Yoder <ftyoder(at)yoderbuilt.com>
Subject: Re: fuel seepage
To: kis-list(at)matronics.com
Date: Friday, October 22, 2010, 5:50 PM

I don't have my Builders Manual with me, and it has been since the mid 90's that I built the wings on my TR-1, but I recall that we were to coat the interior of the tank with a fairly thick coat of epoxy to make the tank. It did not call for using a sealer, i.e.. Jefco. Did those of you with seeps use the extra coats of epoxy prior to the sealer? The extra epoxy coat is all I used.
Tim
[quote] ---


- The Matronics KIS-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?KIS-List
Back to top
mantafs(at)earthlink.net
Guest





PostPosted: Sat Oct 23, 2010 5:59 am    Post subject: fuel seepage Reply with quote

Hi Scott,

I am not so sure I would try to seal the outside. If you are having fuel going into the core and laminate then I think that I would like to have the fuel have a way out. Not that it really matters since there will still be fuel in the core.

In the China LSA they were to use the Jeffco but only after much effort was spent trying to make sure the weave was fully filled with epoxy. I think the Jeffco is very thick and will not really get into the pores.

I know it is a huge and difficult job but I would try to fix the seepage from the inside.

Mark

--


- The Matronics KIS-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?KIS-List
Back to top
Flyinisfun(at)aol.com
Guest





PostPosted: Sat Oct 23, 2010 7:59 am    Post subject: fuel seepage Reply with quote

Hi Scott,
I have been reading your comments about your wing tank fuel leaks and feel you have used cosmetics to superficially solve your problem.  You now have to seal the leak at the source and may never know whether you have really done that or not. I would be real concerned that the skin being soaked over a long period of time will deteriorate the fiber structure. You won't know until some years from now if there is a real problem.

I also had some leaks in my tanks but at the contact points to the spar. I drilled two holes between each tank rib, about 1-1/4" in size in the very leading edge of my wing. This is where the joggles overlap each other. The holes were about 4 inches apart. I got some empty caulking tubes that have threaded fittings on the outlet end, then got a fitting that had a 1/4" size hole that I could fit a 1/4" copper tube to and attached about 3.5 foot of tubing to it. When I was ready I mixed up flox and epoxy, pored it in the caulking tube, attached the 1/4" copper tube and while seeing through the second hole in the wing, placed a bead at all contact points inside that fuel bay. You can bend the copper tubing to fit where you need to place material as well as flatten the end a little so you can lay a wider bead of material.  I went from bay to bay doing just that. You can set up a 350 watt quartz light under the wing at the bay you are working in and it will give all the light you need to see what your doing. Keep the light some 2 ft. away and monitor the tempt of it on the skin as it will get to hot if too close. It will shine through the painted skin great.  In your case you may need to rig some sort of spray that could be used to spray material on the flat surface for sealing it. When your done, lay about 4 layers of wetted glass cloth over the holes and blend in to the surface and repaint. Fill with fuel and recheck for leaks before blending in and repainting.

I filled my tank with water and ran water through it before I drilled the 1-1/4" holes in an effort to get rid of gas and fumes. Let the tanks set for a couple of days in a warm environment so the water will evaporate before applying epoxy. Don't worry about water in your tanks, you've heard of condensate in your fuel?
Good luck.

Jesse

[quote][b]


- The Matronics KIS-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?KIS-List
Back to top
kentpyle(at)iland.net
Guest





PostPosted: Sat Oct 23, 2010 8:09 am    Post subject: fuel seepage Reply with quote

Scott, I worked nearly one entire summer on the fuel problems. The left wing tank and not been bonded to the wing spar. I would open up the wing seal with epoxy and then put the fuel back into the tank only to find a leak in another spot. This happend four times. I finally took the wing back to shop opened up the top an did all the bays with the sealer. this held for about three years and the seeping started over again. A very light seep, but annoying just same. Kent
[quote] ---


- The Matronics KIS-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?KIS-List
Back to top
Display posts from previous:   
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> KIS-List All times are GMT - 8 Hours
Goto page Previous  1, 2
Page 2 of 2

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group