 |
Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
|
| View previous topic :: View next topic |
| Author |
Message |
rv9jim(at)juno.com
Guest
|
 Posted: Sun Aug 03, 2008 1:14 pm Post subject: Leaking QB Tanks |
 |
|
List:
I have a QB RV9-A and I have a leaking left tank. The unusual part is-
the pro seal is softening with the 100LL. On the spar end of the last
rib, the leak begins about half the way down and around the bottom and
almost to the leading edge. The pro seal is soft enough to act like
grease. You can wipe it from the aluminum skin. Not firm and stiff
like it is suppose to. I keep my tanks full after every flight so the
whole rib is subjected to fuel. It is only on the left tank and the
right one is fine. My guru / EAA inspector here has had two tanks which
leaked on other QB RV's. He is building a 9-A also and they all have
passed the balloon test. But he is now questioning the pro seal on his
tanks. Has any others had the same problem? I hope I can clean the pro
seal away and put on some new sealant and stop the problem. A message is
going to Van's also about my problem.
Jim Nelson
RV9-A
N15JN (5 hours)
____________________________________________________________
Play it loud with a new car stereo! Click here!
http://thirdpartyoffers.juno.com/TGL2141/fc/Ioyw6i3n6nDMYKsoIPPJLox55cJRk0c37EpWd00895opHbzZFHtA4j/
| | - The Matronics RV-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?RV-List |
|
|
|
| Back to top |
|
 |
n5lp(at)warpdriveonline.c
Guest
|
| Posted: Sun Aug 03, 2008 2:06 pm Post subject: Leaking QB Tanks |
|
|
On Aug 3, 2008, at 3:09 PM, James H Nelson wrote:
| Quote: |
List:
I have a QB RV9-A and I have a leaking left tank. The unusual part
is-
the pro seal is softening with the 100LL. On the spar end of the last
rib, the leak begins about half the way down and around the bottom and
almost to the leading edge. The pro seal is soft enough to act like
grease. You can wipe it from the aluminum skin. Not firm and stiff
like it is suppose to...Has any others had the same problem?
|
Exactly what happened to my quick-build tank. Pictures here http://
www.vansairforce.com/community/showthread.php?t 6159&highlight=sealant
| | - The Matronics RV-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?RV-List |
|
|
|
| Back to top |
|
|
rv8a.doug(at)net-lynx.com
Guest
|
| Posted: Sun Aug 03, 2008 3:47 pm Post subject: Leaking QB Tanks |
|
|
Gentlemen,
This problem is not just related to the relatively new quick-build tanks. Last week I found the same problem with one of the fuel tanks on an RV-4 (1993) I recently purchased. The previous owner (original builder) repaired a small leak in the tank a few years ago and is very confident that the pro-seal he applied was done correctly. We were both very surprised to find most of the pro-seal on the lower portion of the tank soft and gooey. The pro-seal on the upper portion of the tank is still hard. Another local builder had the same problem with one of his -8 QB tanks. It appears that this is a somewhat common problem on tanks that have been leaking for an extended period of time. I found the following comments on another RV list:
The proseal on my lhs wing inner rib has gone totally sticky [can smear it off with a finger] after flying with a leaking tank for 2 months. The wings are quickbuilt and the inspection cover was leaking. Avgas has leaked onto the factory applied proseal on the bottom of the inner rib. [just below the cover]
I queried this with Vans and they said that the blue dye in avgas and oxygen cause the proseal to soften. I cannot argue with them, but they couldnt explain why this happened.
The proseal that did not have fuel leaking on it is ok.
I know I should have attended to the leak sooner, but flying was more important at the time. Had I known I would have taken care of it sooner.
What I still dont understand is why the proseal went totally soft. Can anyone explain ??
Gus at Vans said that there are no fuel fumes on the outside of the tank, so as the fuel drips onto the proseal, it evaporates and leaves the blue dye behind. This will lead to the proseal becoming soft and sticky and resembles uncured proseal. At least this is how I understand it.
I asked how its possible because it is a fuel sealer, and he said they are not quite sure.
Basically they say its my fault, [which I wont dispute as the inspection cover had weeped fuel for 2 months] ,but i still would like a technical explanation why this happened.[ie why the proseal softened]
Either way I have to sort it out.
It is the bead of proseal from the leading edge to the rear spar on the outside of the inner rib that has gone soft.
I've seen this on a re-seal job that was done on our Cessna Cardinal. I scraped it all out of our tanks and reapplied with new/good proseal. That is NOT normal, don't believe Van's on this one.
Vans has been promising to speak to their supplier to get me the facts. I have been patiently waiting for a answer ,but none yet. The clearly told me they mixed it correctly and that it was my fault it went soft.[fuel shouldnt leak on it]
I dont want to make a issue about it, but feel a bit short changed at the moment. Vans has always been great about sorting out issues. I wonder why they are avoiding this one ??
As I said before, if its my fault ,so be it. However everyone I speak to says its not, and Vans doesnt seem to agree.
My plan is to gently scrape & wipe off the soft stuff, scratch up the aluminum surface, and re-apply fresh pro-seal I purchased from Van's.
Regards,
Doug Morrison
RV-4 (N818WW)
RV-8A (N666NJ Reserved) (In the process of converting to a -
Larry Pardue wrote:
[quote]--> RV-List message posted by: Larry Pardue <n5lp(at)warpdriveonline.com> (n5lp(at)warpdriveonline.com)
On Aug 3, 2008, at 3:09 PM, James H Nelson wrote:
| Quote: | --> RV-List message posted by: James H Nelson <rv9jim(at)juno.com> (rv9jim(at)juno.com)
List:
I have a QB RV9-A and I have a leaking left tank. The unusual part is-
the pro seal is softening with the 100LL. On the spar end of the last
rib, the leak begins about half the way down and around the bottom and
almost to the leading edge. The pro seal is soft enough to act like
grease. You can wipe it from the aluminum skin. Not firm and stiff
like it is suppose to...Has any others had the same problem?
|
Exactly what happened to my quick-build tank. Pictures here http:// [url=http://www.vansairforce.com/community/showthread.php?t 6159&highlight=sealant]www.vansairforce.com/community/showthread.php?t 6159&highlight=sealant[/url]
[b]
| | - The Matronics RV-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?RV-List |
|
|
|
| Back to top |
|
|
rickpegser(at)yahoo.com
Guest
|
| Posted: Sun Aug 03, 2008 4:56 pm Post subject: Leaking QB Tanks |
|
|
proseal applied and cured per the spec does not disolve with 100ll. so what happened.
are you using marvel mystry oil. or any other fuel additive.
if not i would have to think that the proseal was stored improperly or out of date. excessive heat and time will screwup proseal still in the can. since this is a quick build with only 5 hrs on it. i would be requesting two new tanks since the other was probably built with the same bad proseal. and a payment for the cost of painting. remember all of the material for the q biuld are shipped ocean cargo to the pi. and without climate controlls on the container. it is quite possible that the material saw in excess of 150 degrees inside the container.
please tell us what happens, if vans does not stand behind thier q builds it might be a good time to have the local faa give them a chat.
i have repaired more of this type of tank then you can shake a stick at, so call me if you have to do it yourself. be happy to help with advice.
ps
i am replacing the bonded doublers on a exec helicopter rotor blades right now , it is my thought that the epoxy used was probably out of date and failed as a result. having way to much fun removing it.
rick miller
559-270-7113
a+p, i/a
--- On Sun, 8/3/08, Doug Morrison <rv8a.doug(at)net-lynx.com> wrote:
| Quote: | From: Doug Morrison <rv8a.doug(at)net-lynx.com>
Subject: Re: Leaking QB Tanks
To: rv-list(at)matronics.com
Date: Sunday, August 3, 2008, 4:41 PM
Gentlemen,
This problem is not just related to the relatively new quick-build tanks. Last week I found the same problem with one of the fuel tanks on an RV-4 (1993) I recently purchased. The previous owner (original builder) repaired a small leak in the tank a few years ago and is very confident that the pro-seal he applied was done correctly. We were both very surprised to find most of the pro-seal on the lower portion of the tank soft and gooey. The pro-seal on the upper portion of the tank is still hard. Another local builder had the same problem with one of his -8 QB tanks. It appears that this is a somewhat common problem on tanks that have been leaking for an extended period of time. I found the following comments on another RV list:
The proseal on my lhs wing inner rib has gone totally sticky [can smear it off with a finger] after flying with a leaking tank for 2 months. The wings are quickbuilt and the inspection cover was leaking. Avgas has leaked onto the factory applied proseal on the bottom of the inner rib. [just below the cover]
I queried this with Vans and they said that the blue dye in avgas and oxygen cause the proseal to soften. I cannot argue with them, but they couldnt explain why this happened.
The proseal that did not have fuel leaking on it is ok.
I know I should have attended to the leak sooner, but flying was more important at the time. Had I known I would have taken care of it sooner.
What I still dont understand is why the proseal went totally soft. Can anyone explain ??
Gus at Vans said that there are no fuel fumes on the outside of the tank, so as the fuel drips onto the proseal, it evaporates and leaves the blue dye behind. This will lead to the proseal becoming soft and sticky and resembles uncured proseal. At least this is how I understand it.
I asked how its possible because it is a fuel sealer, and he said they are not quite sure.
Basically they say its my fault, [which I wont dispute as the inspection cover had weeped fuel for 2 months] ,but i still would like a technical explanation why this happened.[ie why the proseal softened]
Either way I have to sort it out.
It is the bead of proseal from the leading edge to the rear spar on the outside of the inner rib that has gone soft.
I've seen this on a re-seal job that was done on our Cessna Cardinal. I scraped it all out of our tanks and reapplied with new/good proseal. That is NOT normal, don't believe Van's on this one.
Vans has been promising to speak to their supplier to get me the facts. I have been patiently waiting for a answer ,but none yet. The clearly told me they mixed it correctly and that it was my fault it went soft.[fuel shouldnt leak on it]
I dont want to make a issue about it, but feel a bit short changed at the moment. Vans has always been great about sorting out issues. I wonder why they are avoiding this one ??
As I said before, if its my fault ,so be it. However everyone I speak to says its not, and Vans doesnt seem to agree.
My plan is to gently scrape & wipe off the soft stuff, scratch up the aluminum surface, and re-apply fresh pro-seal I purchased from Van's.
Regards,
Doug Morrison
RV-4 (N818WW)
RV-8A (N666NJ Reserved) (In the process of converting to a -
Larry Pardue wrote:
| Quote: | --> RV-List message posted by: Larry Pardue <n5lp(at)warpdriveonline.com> (n5lp(at)warpdriveonline.com)
On Aug 3, 2008, at 3:09 PM, James H Nelson wrote:
| Quote: | --> RV-List message posted by: James H Nelson <rv9jim(at)juno.com> (rv9jim(at)juno.com)
List:
I have a QB RV9-A and I have a leaking left tank. The unusual part is-
the pro seal is softening with the 100LL. On the spar end of the last
rib, the leak begins about half the way down and around the bottom and
almost to the leading edge. The pro seal is soft enough to act like
grease. You can wipe it from the aluminum skin. Not firm and stiff
like it is suppose to...Has any others had the same problem?
|
Exactly what happened to my quick-build tank. Pictures here http:// [url=http://www.vansairforce.com/community/showthread.php?t 6159&highlight=sealant]www.vansairforce.com/community/showthread.php?t 6159&highlight=sealant[/url]
|
|
[quote][b]
| | - The Matronics RV-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?RV-List |
|
|
|
| Back to top |
|
|
Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
|
| Posted: Sun Aug 03, 2008 5:16 pm Post subject: Leaking QB Tanks |
|
|
Any chance mogas was used in any of these tanks? I've seen Proseal
reduced to jelly/peanut butter by mogas.
Doug Morrison wrote:
| Quote: | Gentlemen,
This problem is not just related to the relatively new quick-build
tanks. Last week I found the same problem with one of the fuel tanks
on an RV-4 (1993) I recently purchased. The previous owner (original
builder) repaired a small leak in the tank a few years ago and is very
confident that the pro-seal he applied was done correctly. We were
both very surprised to find most of the pro-seal on the lower portion
of the tank soft and gooey. The pro-seal on the upper portion of the
tank is still hard. Another local builder had the same problem with
one of his -8 QB tanks. It appears that this is a somewhat common
problem on tanks that have been leaking for an extended period of
time. I found the following comments on another RV list:
The proseal on my lhs wing inner rib has gone totally sticky [can
smear it off with a finger] after flying with a leaking tank for 2
months. The wings are quickbuilt and the inspection cover was leaking.
Avgas has leaked onto the factory applied proseal on the bottom of the
inner rib. [just below the cover]
I queried this with Vans and they said that the blue dye in avgas and
oxygen cause the proseal to soften. I cannot argue with them, but they
couldnt explain why this happened.
The proseal that did not have fuel leaking on it is ok.
I know I should have attended to the leak sooner, but flying was more
important at the time. Had I known I would have taken care of it sooner.
What I still dont understand is why the proseal went totally soft. Can
anyone explain ??
Gus at Vans said that there are no fuel fumes on the outside of the
tank, so as the fuel drips onto the proseal, it evaporates and leaves
the blue dye behind. This will lead to the proseal becoming soft and
sticky and resembles uncured proseal. At least this is how I
understand it.
I asked how its possible because it is a fuel sealer, and he said they
are not quite sure.
Basically they say its my fault, [which I wont dispute as the
inspection cover had weeped fuel for 2 months] ,but i still would like
a technical explanation why this happened.[ie why the proseal softened]
Either way I have to sort it out.
It is the bead of proseal from the leading edge to the rear spar on
the outside of the inner rib that has gone soft.
I've seen this on a re-seal job that was done on our Cessna Cardinal.
I scraped it all out of our tanks and reapplied with new/good proseal.
That is NOT normal, don't believe Van's on this one.
Vans has been promising to speak to their supplier to get me the
facts. I have been patiently waiting for a answer ,but none yet. The
clearly told me they mixed it correctly and that it was my fault it
went soft.[fuel shouldnt leak on it]
I dont want to make a issue about it, but feel a bit short changed at
the moment. Vans has always been great about sorting out issues. I
wonder why they are avoiding this one ??
As I said before, if its my fault ,so be it. However everyone I speak
to says its not, and Vans doesnt seem to agree.
My plan is to gently scrape & wipe off the soft stuff, scratch up the
aluminum surface, and re-apply fresh pro-seal I purchased from Van's.
Regards,
Doug Morrison
RV-4 (N818WW)
RV-8A (N666NJ Reserved) (In the process of converting to a -
Larry Pardue wrote:
>
> On Aug 3, 2008, at 3:09 PM, James H Nelson wrote:
>
>>
>>
>> List:
>> I have a QB RV9-A and I have a leaking left tank. The unusual part
>> is-
>> the pro seal is softening with the 100LL. On the spar end of the last
>> rib, the leak begins about half the way down and around the bottom and
>> almost to the leading edge. The pro seal is soft enough to act like
>> grease. You can wipe it from the aluminum skin. Not firm and stiff
>> like it is suppose to...Has any others had the same problem?
>
> Exactly what happened to my quick-build tank. Pictures here http://
> www.vansairforce.com/community/showthread.php?t 6159&highlight=sealant
>
|
| | - The Matronics RV-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?RV-List |
|
_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD |
|
| Back to top |
|
|
khorton01(at)rogers.com
Guest
|
| Posted: Sun Aug 03, 2008 5:30 pm Post subject: Leaking QB Tanks |
|
|
On 3 Aug 2008, at 20:50, RICHARD MILLER wrote:
| Quote: | please tell us what happens, if vans does not stand behind thier q
builds it might be a good time to have the local faa give them a chat.
|
These are not type-certificated aircraft, so FAR 39 (Airworthiness
Directives) does not apply. If the local FAA wanted to talk to Van's
about this, which FAR subparagraph should they discuss?
--
Kevin Horton
RV-8 (FInal Assembly)
Ottawa, Canada
http://www.kilohotel.com/rv8
| | - The Matronics RV-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?RV-List |
|
|
|
| Back to top |
|
|
n5lp(at)warpdriveonline.c
Guest
|
| Posted: Sun Aug 03, 2008 5:51 pm Post subject: Leaking QB Tanks |
|
|
On Aug 3, 2008, at 7:11 PM, Kelly McMullen wrote:
| Quote: |
Any chance mogas was used in any of these tanks? I've seen Proseal
reduced to jelly/peanut butter by mogas.
|
My tanks have never had anything in them but 100LL avgas.
Larry Pardue
| | - The Matronics RV-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?RV-List |
|
|
|
| Back to top |
|
|
jsflyrv(at)verizon.net
Guest
|
| Posted: Sun Aug 03, 2008 5:55 pm Post subject: Leaking QB Tanks |
|
|
RICHARD MILLER wrote:
| Quote: |
time to have the local faa give them a chat.
rick miller
559-270-7113
a+p, i/a
Give them a chat, what for? The FAA did not build it.
|
| | - The Matronics RV-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?RV-List |
|
|
|
| Back to top |
|
|
rv8a.doug(at)net-lynx.com
Guest
|
| Posted: Sun Aug 03, 2008 6:42 pm Post subject: Leaking QB Tanks |
|
|
List,
I'll use Richard's message to answer his and John's, Kelly's, & Kevin's. Remember the comment in red below are from a Vansairforce.net thread. They are not my comments.
1) Use of a plastic scraper and MEK to remove the soft pro-seal sounds like a good idea.
2) I am fairly confident that oil additives and mogas have never been used in my -4 (circa 1993) or my friends -8 QB. The only commonality is that the tanks were leaking for an extended period of time.
3) The previous owner of my -4 is fairly confident that the pro-seal he used was fresh and mixed in the proper ratio.
4) The pro-seal on the QB tanks of the -8A I have under construction is full cured. Only time will tell if the pro-seal will soften up when exposed to fuel in the tank.
5) I am very satisfied with the workmanship of my -8A QB. If the tanks begin to leak due to outdated pro-seal used at the time of manufacturer, I will fix the problem and move on. Of course I will advise Van's of the problem so they can revise their manufacture procedure and hopefully prevent the problem in the future. To be safe, I will probably fill the tanks with fuel (with the tanks off the wing) and let them sit for a few months before I begin painting and final assembly. Any leaks or pro-seal softening should show up during that time.
As far as I am concerned, the -8A kit is a real bargain, even with the inevitable anomalies. Each of you will have to decide if you want to press the issue with Van's. Personally, I am prepared to accept a few minor problems and just move on. Also, getting the FAA involved would be the last thing I would do.
Thanks for everyone's comments.
Regards,
Doug Morrison
RICHARD MILLER wrote:
[quote] proseal applied and cured per the spec does not disolve with 100ll. so what happened.
are you using marvel mystry oil. or any other fuel additive.
if not i would have to think that the proseal was stored improperly or out of date. excessive heat and time will screwup proseal still in the can. since this is a quick build with only 5 hrs on it. i would be requesting two new tanks since the other was probably built with the same bad proseal. and a payment for the cost of painting. remember all of the material for the q biuld are shipped ocean cargo to the pi. and without climate controlls on the container. it is quite possible that the material saw in excess of 150 degrees inside the container.
please tell us what happens, if vans does not stand behind thier q builds it might be a good time to have the local faa give them a chat.
i have repaired more of this type of tank then you can shake a stick at, so call me if you have to do it yourself. be happy to help with advice.
ps
i am replacing the bonded doublers on a exec helicopter rotor blades right now , it is my thought that the epoxy used was probably out of date and failed as a result. having way to much fun removing it.
rick miller
559-270-7113
a+p, i/a
--- On Sun, 8/3/08, Doug Morrison <rv8a.doug(at)net-lynx.com> (rv8a.doug(at)net-lynx.com) wrote:
| Quote: | From: Doug Morrison <rv8a.doug(at)net-lynx.com> (rv8a.doug(at)net-lynx.com)
Subject: Re: Leaking QB Tanks
To: rv-list(at)matronics.com (rv-list(at)matronics.com)
Date: Sunday, August 3, 2008, 4:41 PM
Gentlemen,
This problem is not just related to the relatively new quick-build tanks. Last week I found the same problem with one of the fuel tanks on an RV-4 (1993) I recently purchased. The previous owner (original builder) repaired a small leak in the tank a few years ago and is very confident that the pro-seal he applied was done correctly. We were both very surprised to find most of the pro-seal on the lower portion of the tank soft and gooey. The pro-seal on the upper portion of the tank is still hard. Another local builder had the same problem with one of his -8 QB tanks. It appears that this is a somewhat common problem on tanks that have been leaking for an extended period of time. I found the following comments on another RV list:
The proseal on my lhs wing inner rib has gone totally sticky [can smear it off with a finger] after flying with a leaking tank for 2 months. The wings are quickbuilt and the inspection cover was leaking. Avgas has leaked onto the factory applied proseal on the bottom of the inner rib. [just below the cover]
I queried this with Vans and they said that the blue dye in avgas and oxygen cause the proseal to soften. I cannot argue with them, but they couldnt explain why this happened.
The proseal that did not have fuel leaking on it is ok.
I know I should have attended to the leak sooner, but flying was more important at the time. Had I known I would have taken care of it sooner.
What I still dont understand is why the proseal went totally soft. Can anyone explain ??
Gus at Vans said that there are no fuel fumes on the outside of the tank, so as the fuel drips onto the proseal, it evaporates and leaves the blue dye behind. This will lead to the proseal becoming soft and sticky and resembles uncured proseal. At least this is how I understand it.
I asked how its possible because it is a fuel sealer, and he said they are not quite sure.
Basically they say its my fault, [which I wont dispute as the inspection cover had weeped fuel for 2 months] ,but i still would like a technical explanation why this happened.[ie why the proseal softened]
Either way I have to sort it out.
It is the bead of proseal from the leading edge to the rear spar on the outside of the inner rib that has gone soft.
I've seen this on a re-seal job that was done on our Cessna Cardinal. I scraped it all out of our tanks and reapplied with new/good proseal. That is NOT normal, don't believe Van's on this one.
Vans has been promising to speak to their supplier to get me the facts. I have been patiently waiting for a answer ,but none yet. The clearly told me they mixed it correctly and that it was my fault it went soft.[fuel shouldnt leak on it]
I dont want to make a issue about it, but feel a bit short changed at the moment. Vans has always been great about sorting out issues. I wonder why they are avoiding this one ??
As I said before, if its my fault ,so be it. However everyone I speak to says its not, and Vans doesnt seem to agree.
My plan is to gently scrape & wipe off the soft stuff, scratch up the aluminum surface, and re-apply fresh pro-seal I purchased from Van's.
Regards,
Doug Morrison
RV-4 (N818WW)
RV-8A (N666NJ Reserved) (In the process of converting to a -
Larry Pardue wrote:
| Quote: | --> RV-List message posted by: Larry Pardue <n5lp(at)warpdriveonline.com> (n5lp(at)warpdriveonline.com)
On Aug 3, 2008, at 3:09 PM, James H Nelson wrote:
| Quote: | --> RV-List message posted by: James H Nelson <rv9jim(at)juno.com> (rv9jim(at)juno.com)
List:
I have a QB RV9-A and I have a leaking left tank. The unusual part is-
the pro seal is softening with the 100LL. On the spar end of the last
rib, the leak begins about half the way down and around the bottom and
almost to the leading edge. The pro seal is soft enough to act like
grease. You can wipe it from the aluminum skin. Not firm and stiff
like it is suppose to...Has any others had the same problem?
|
Exactly what happened to my quick-build tank. Pictures here http:// [url=http://www.vansairforce.com/community/showthread.php?t 6159&highlight=sealant]www.vansairforce.com/community/showthread.php?t 6159&highlight=sealant[/url]
|
|
| Quote: |
href="3D%22http://www.matronics.com/Navigator?RV-List%22">http://www.matronics.com/Navigator?RV-List
|
[b]
| | - The Matronics RV-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?RV-List |
|
|
|
| Back to top |
|
|
Charles Heathco
Joined: 10 Jan 2006
Posts: 201
|
| Posted: Mon Aug 04, 2008 4:46 am Post subject: Leaking QB Tanks |
|
|
Wanted to comment on the Mogas reducing proseal to PBJ. My plane has run on mogas since first flight 8 yrs ago, no leaks, no sign of leaks. Charles
[quote][b]
| | - The Matronics RV-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?RV-List |
|
|
|
| Back to top |
|
|
timb
Joined: 16 Apr 2008
Posts: 77
Location: Frankston, Texas
|
| Posted: Mon Aug 04, 2008 4:48 am Post subject: Leaking QB Tanks |
|
|
| Quote: | >proseal applied and cured per the spec does not disolve with 100ll. so what happened. <<
|
I am pretty sure the response quoted from Vans was the die in 100ll causes the problem when a leak is allowed to persist. This is actually pretty good information for us all to realize if true. I would be definitely concerned if they said 100ll caused it. But that isn’t what I read in the post.
Tim Bryan
RV-6 Flying
N616TB over 100 hours now
[quote][b]
| | - The Matronics RV-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?RV-List |
|
_________________
Tim Bryan
RV-6 Flying
N616TB |
|
| Back to top |
|
|
AV8ORJWC
Joined: 13 Jul 2006
Posts: 1149
Location: Aurora, Oregon "Home of VANS"
|
| Posted: Mon Aug 04, 2008 6:37 am Post subject: Leaking QB Tanks |
|
|
Repeating something posted a long time ago. ProSeal is a trademarked name and is often generically used in conversation to identify tank sealant(much like Scotch Tape or Kleenex). The product is PolySulfate Thixotrophic. Most of the stuff Van's sells is sealant but is not ProSeal. ProSeal comes in scores of product viscosities of A, B and C and various temperature and adhesion formulations (which are numbered).
When Kelly mentions proseal turning to putty, it was probably Flamemaster and was not formulated for MOGAS. I am confident I can find a Desoto "ProSeal" ™ which can withstand MOGAS. I will do some research and do a trial on the stuff.
There has been poor reporting on what products will hold up to MOGAS.
Fixing a leaking tank is a serious enough issue to get to the root and remediate.
John Cox
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of Doug Morrison
Sent: Sunday, August 03, 2008 7:37 PM
To: rv-list(at)matronics.com
Subject: Re: Leaking QB Tanks
List,
I'll use Richard's message to answer his and John's, Kelly's, & Kevin's. Remember the comment in red below are from a Vansairforce.net thread. They are not my comments.
1) Use of a plastic scraper and MEK to remove the soft pro-seal sounds like a good idea.
2) I am fairly confident that oil additives and mogas have never been used in my -4 (circa 1993) or my friends -8 QB. The only commonality is that the tanks were leaking for an extended period of time.
3) The previous owner of my -4 is fairly confident that the pro-seal he used was fresh and mixed in the proper ratio.
4) The pro-seal on the QB tanks of the -8A I have under construction is full cured. Only time will tell if the pro-seal will soften up when exposed to fuel in the tank.
5) I am very satisfied with the workmanship of my -8A QB. If the tanks begin to leak due to outdated pro-seal used at the time of manufacturer, I will fix the problem and move on. Of course I will advise Van's of the problem so they can revise their manufacture procedure and hopefully prevent the problem in the future. To be safe, I will probably fill the tanks with fuel (with the tanks off the wing) and let them sit for a few months before I begin painting and final assembly. Any leaks or pro-seal softening should show up during that time.
As far as I am concerned, the -8A kit is a real bargain, even with the inevitable anomalies. Each of you will have to decide if you want to press the issue with Van's. Personally, I am prepared to accept a few minor problems and just move on. Also, getting the FAA involved would be the last thing I would do.
Thanks for everyone's comments.
Regards,
Doug Morrison
RICHARD MILLER wrote:
proseal applied and cured per the spec does not disolve with 100ll. so what happened.
are you using marvel mystry oil. or any other fuel additive.
if not i would have to think that the proseal was stored improperly or out of date. excessive heat and time will screwup proseal still in the can. since this is a quick build with only 5 hrs on it. i would be requesting two new tanks since the other was probably built with the same bad proseal. and a payment for the cost of painting. remember all of the material for the q biuld are shipped ocean cargo to the pi. and without climate controlls on the container. it is quite possible that the material saw in excess of 150 degrees inside the container.
please tell us what happens, if vans does not stand behind thier q builds it might be a good time to have the local faa give them a chat.
i have repaired more of this type of tank then you can shake a stick at, so call me if you have to do it yourself. be happy to help with advice.
ps
i am replacing the bonded doublers on a exec helicopter rotor blades right now , it is my thought that the epoxy used was probably out of date and failed as a result. having way to much fun removing it.
rick miller
559-270-7113
a+p, i/a
--- On Sun, 8/3/08, Doug Morrison <rv8a.doug(at)net-lynx.com> (rv8a.doug(at)net-lynx.com) wrote:
| Quote: |
From: Doug Morrison <rv8a.doug(at)net-lynx.com> (rv8a.doug(at)net-lynx.com)
Subject: Re: Leaking QB Tanks
To: rv-list(at)matronics.com (rv-list(at)matronics.com)
Date: Sunday, August 3, 2008, 4:41 PM
Gentlemen,
This problem is not just related to the relatively new quick-build tanks. Last week I found the same problem with one of the fuel tanks on an RV-4 (1993) I recently purchased. The previous owner (original builder) repaired a small leak in the tank a few years ago and is very confident that the pro-seal he applied was done correctly. We were both very surprised to find most of the pro-seal on the lower portion of the tank soft and gooey. The pro-seal on the upper portion of the tank is still hard. Another local builder had the same problem with one of his -8 QB tanks. It appears that this is a somewhat common problem on tanks that have been leaking for an extended period of time. I found the following comments on another RV list:
The proseal on my lhs wing inner rib has gone totally sticky [can smear it off with a finger] after flying with a leaking tank for 2 months. The wings are quickbuilt and the inspection cover was leaking. Avgas has leaked onto the factory applied proseal on the bottom of the inner rib. [just below the cover]
I queried this with Vans and they said that the blue dye in avgas and oxygen cause the proseal to soften. I cannot argue with them, but they couldnt explain why this happened.
The proseal that did not have fuel leaking on it is ok.
I know I should have attended to the leak sooner, but flying was more important at the time. Had I known I would have taken care of it sooner.
What I still dont understand is why the proseal went totally soft. Can anyone explain ??
Gus at Vans said that there are no fuel fumes on the outside of the tank, so as the fuel drips onto the proseal, it evaporates and leaves the blue dye behind. This will lead to the proseal becoming soft and sticky and resembles uncured proseal. At least this is how I understand it.
I asked how its possible because it is a fuel sealer, and he said they are not quite sure.
Basically they say its my fault, [which I wont dispute as the inspection cover had weeped fuel for 2 months] ,but i still would like a technical explanation why this happened.[ie why the proseal softened]
Either way I have to sort it out.
It is the bead of proseal from the leading edge to the rear spar on the outside of the inner rib that has gone soft.
I've seen this on a re-seal job that was done on our Cessna Cardinal. I scraped it all out of our tanks and reapplied with new/good proseal. That is NOT normal, don't believe Van's on this one.
Vans has been promising to speak to their supplier to get me the facts. I have been patiently waiting for a answer ,but none yet. The clearly told me they mixed it correctly and that it was my fault it went soft.[fuel shouldnt leak on it]
I dont want to make a issue about it, but feel a bit short changed at the moment. Vans has always been great about sorting out issues. I wonder why they are avoiding this one ??
As I said before, if its my fault ,so be it. However everyone I speak to says its not, and Vans doesnt seem to agree.
My plan is to gently scrape & wipe off the soft stuff, scratch up the aluminum surface, and re-apply fresh pro-seal I purchased from Van's.
Regards,
Doug Morrison
RV-4 (N818WW)
RV-8A (N666NJ Reserved) (In the process of converting to a -
Larry Pardue wrote:
--> RV-List message posted by: Larry Pardue <n5lp(at)warpdriveonline.com> (n5lp(at)warpdriveonline.com)
On Aug 3, 2008, at 3:09 PM, James H Nelson wrote:
--> RV-List message posted by: James H Nelson <rv9jim(at)juno.com> (rv9jim(at)juno.com)
List:
I have a QB RV9-A and I have a leaking left tank. The unusual part is-
the pro seal is softening with the 100LL. On the spar end of the last
rib, the leak begins about half the way down and around the bottom and
almost to the leading edge. The pro seal is soft enough to act like
grease. You can wipe it from the aluminum skin. Not firm and stiff
like it is suppose to...Has any others had the same problem?
Exactly what happened to my quick-build tank. Pictures here http:// www.vansairforce.com/community/showthread.php?t=26159&highlight=sealant
|
| Quote: | | href="3D%22http://www.matronics.com/Navigator?RV-List%22">http://www.matronics.com/Navigator?RV-List |
[quote] [/b][/b][/b][/b]http://www.matronics.com/Navigator?RV-List[/b]http://forums.matronics.com[/b]http://www.matronics.com/contribution [b]
| | - The Matronics RV-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?RV-List |
|
|
|
| Back to top |
|
|
bmeyette
Joined: 14 Mar 2007
Posts: 72
Location: Cornish, NH
|
| Posted: Mon Aug 04, 2008 9:23 am Post subject: Leaking QB Tanks |
|
|
I talked to a tech at ProSeal a few years ago about expiration dates. As he described it, the only problem older ProSeal will cause is extended curing time. So, it would seem to me that , if it cured, then it's not a problem with expiration date. I'd suggest a direct call to the ProSeal people to ask about this problem .
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of RICHARD MILLER
Sent: Sunday, August 03, 2008 8:50 PM
To: rv-list(at)matronics.com
Subject: Re: Leaking QB Tanks
proseal applied and cured per the spec does not disolve with 100ll. so what happened.
are you using marvel mystry oil. or any other fuel additive.
if not i would have to think that the proseal was stored improperly or out of date. excessive heat and time will screwup proseal still in the can. since this is a quick build with only 5 hrs on it. i would be requesting two new tanks since the other was probably built with the same bad proseal. and a payment for the cost of painting. remember all of the material for the q biuld are shipped ocean cargo to the pi. and without climate controlls on the container. it is quite possible that the material saw in excess of 150 degrees inside the container.
please tell us what happens, if vans does not stand behind thier q builds it might be a good time to have the local faa give them a chat.
i have repaired more of this type of tank then you can shake a stick at, so call me if you have to do it yourself. be happy to help with advice.
ps
i am replacing the bonded doublers on a exec helicopter rotor blades right now , it is my thought that the epoxy used was probably out of date and failed as a result. having way to much fun removing it.
rick miller
559-270-7113
a+p, i/a
--- On Sun, 8/3/08, Doug Morrison <rv8a.doug(at)net-lynx.com> wrote:
| Quote: | From: Doug Morrison <rv8a.doug(at)net-lynx.com>
Subject: Re: RV-List: Leaking QB Tanks
To: rv-list(at)matronics.com
Date: Sunday, August 3, 2008, 4:41 PM
Gentlemen,
This problem is not just related to the relatively new quick-build tanks. Last week I found the same problem with one of the fuel tanks on an RV-4 (1993) I recently purchased. The previous owner (original builder) repaired a small leak in the tank a few years ago and is very confident that the pro-seal he applied was done correctly. We were both very surprised to find most of the pro-seal on the lower portion of the tank soft and gooey. The pro-seal on the upper portion of the tank is still hard. Another local builder had the same problem with one of his -8 QB tanks. It appears that this is a somewhat common problem on tanks that have been leaking for an extended period of time. I found the following comments on another RV list:
The proseal on my lhs wing inner rib has gone totally sticky [can smear it off with a finger] after flying with a leaking tank for 2 months. The wings are quickbuilt and the inspection cover was leaking. Avgas has leaked onto the factory applied proseal on the bottom of the inner rib. [just below the cover]
I queried this with Vans and they said that the blue dye in avgas and oxygen cause the proseal to soften. I cannot argue with them, but they couldnt explain why this happened.
The proseal that did not have fuel leaking on it is ok.
I know I should have attended to the leak sooner, but flying was more important at the time. Had I known I would have taken care of it sooner.
What I still dont understand is why the proseal went totally soft. Can anyone explain ??
Gus at Vans said that there are no fuel fumes on the outside of the tank, so as the fuel drips onto the proseal, it evaporates and leaves the blue dye behind. This will lead to the proseal becoming soft and sticky and resembles uncured proseal. At least this is how I understand it.
I asked how its possible because it is a fuel sealer, and he said they are not quite sure.
Basically they say its my fault, [which I wont dispute as the inspection cover had weeped fuel for 2 months] ,but i still would like a technical explanation why this happened.[ie why the proseal softened]
Either way I have to sort it out.
It is the bead of proseal from the leading edge to the rear spar on the outside of the inner rib that has gone soft.
I've seen this on a re-seal job that was done on our Cessna Cardinal. I scraped it all out of our tanks and reapplied with new/good proseal. That is NOT normal, don't believe Van's on this one.
Vans has been promising to speak to their supplier to get me the facts. I have been patiently waiting for a answer ,but none yet. The clearly told me they mixed it correctly and that it was my fault it went soft.[fuel shouldnt leak on it]
I dont want to make a issue about it, but feel a bit short changed at the moment. Vans has always been great about sorting out issues. I wonder why they are avoiding this one ??
As I said before, if its my fault ,so be it. However everyone I speak to says its not, and Vans doesnt seem to agree.
My plan is to gently scrape & wipe off the soft stuff, scratch up the aluminum surface, and re-apply fresh pro-seal I purchased from Van's.
Regards,
Doug Morrison
RV-4 (N818WW)
RV-8A (N666NJ Reserved) (In the process of converting to a -
Larry Pardue wrote:
| Quote: | --> RV-List message posted by: Larry Pardue <n5lp(at)warpdriveonline.com> (n5lp(at)warpdriveonline.com)
On Aug 3, 2008, at 3:09 PM, James H Nelson wrote:
| Quote: | --> RV-List message posted by: James H Nelson <rv9jim(at)juno.com> (rv9jim(at)juno.com)
List:
I have a QB RV9-A and I have a leaking left tank. The unusual part is-
the pro seal is softening with the 100LL. On the spar end of the last
rib, the leak begins about half the way down and around the bottom and
almost to the leading edge. The pro seal is soft enough to act like
grease. You can wipe it from the aluminum skin. Not firm and stiff
like it is suppose to...Has any others had the same problem?
|
Exactly what happened to my quick-build tank. Pictures here http:// www.vansairforce.com/community/showthread.php?t=26159&highlight=sealant
|
|
| Quote: |
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
href='3D"http://www.matronics.com/Navigator?RV-List"'>http://www.matron3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
href='3D"http://forums.matronics.com"'>http://forums.matronics.com
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
href='3D"http://www.matronics.com/contribution"'>http://www.matronics.com/contribution
3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D
|
7/31/2008 12:00 PM
Checked by AVG.
7/31/2008 12:00 PM
[quote][b]
| | - The Matronics RV-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?RV-List |
|
_________________
Brian Meyette, Cornish, NH
RV-7A QB tipup, supercharged Subaru STi engine, MT CS prop, all glass day/night/IFR panel, being built with solar and wind power
N432MM
http://brian76.mystarband.net/RV-7Ahome.htm |
|
| Back to top |
|
|
bmeyette
Joined: 14 Mar 2007
Posts: 72
Location: Cornish, NH
|
| Posted: Mon Aug 04, 2008 9:29 am Post subject: Leaking QB Tanks |
|
|
I'm not disputing what you're saying, but it seems rather out of line for a
fuel sealer to not work with mogas. I'm sure lots of RVs are flying with
all or partial mogas.
I guess I'd better test this, as I plan to use mogas
--
| | - The Matronics RV-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?RV-List |
|
_________________
Brian Meyette, Cornish, NH
RV-7A QB tipup, supercharged Subaru STi engine, MT CS prop, all glass day/night/IFR panel, being built with solar and wind power
N432MM
http://brian76.mystarband.net/RV-7Ahome.htm |
|
| Back to top |
|
|
Dale Ensing
Joined: 11 Jan 2006
Posts: 571
Location: Aero Plantation Weddington NC
|
| Posted: Mon Aug 04, 2008 10:04 am Post subject: Leaking QB Tanks |
|
|
John,
I think you mean polysulfide not polysulfate.
Dale Ensing
[quote] ---
| | - The Matronics RV-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?RV-List |
|
_________________
Dale Ensing
RV-6A
Aero Plantation
Weddington NC |
|
| Back to top |
|
|
Kellym
Joined: 10 Jan 2006
Posts: 1705
Location: Sun Lakes AZ
|
| Posted: Mon Aug 04, 2008 2:23 pm Post subject: Leaking QB Tanks |
|
|
John,
What I was writing about was an older Mooney that had an older product number ProSeal used in the 1961-mid-seventies models before they switched to the current product numbers. I would agree that it wasn't formulated for mogas, as there was little incentive to use mogas when it only cost 20-30 cents less than 80/87 or 100/130. That version was pink in color, with a reddish brown top coat. Most of the current product I've seen is gray in color(after mixing).
I'm sure that current variety is much more resistant, as they had to formulate to resist high aromatic concentrations that most gasoline formulas, av or mo have in them today. I'm as mystified as the rest on the problem these quick build tanks are showing.
Kelly
John Cox wrote: [quote] <![endif]--> <![endif]-->
Repeating something posted a long time ago. ProSeal is a trademarked name and is often generically used in conversation to identify tank sealant(much like Scotch Tape or Kleenex). The product is PolySulfate Thixotrophic. Most of the stuff Van's sells is sealant but is not ProSeal. ProSeal comes in scores of product viscosities of A, B and C and various temperature and adhesion formulations (which are numbered).
When Kelly mentions proseal turning to putty, it was probably Flamemaster and was not formulated for MOGAS. I am confident I can find a Desoto "ProSeal" ™ which can withstand MOGAS. I will do some research and do a trial on the stuff.
There has been poor reporting on what products will hold up to MOGAS.
Fixing a leaking tank is a serious enough issue to get to the root and remediate.
John Cox
[b]
| | - The Matronics RV-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?RV-List |
|
_________________
Kelly McMullen
A&P/IA, EAA Tech Counselor # 5286
KCHD |
|
| Back to top |
|
|
rgf(at)dcn.davis.ca.us
Guest
|
| Posted: Mon Aug 04, 2008 4:49 pm Post subject: Leaking QB Tanks |
|
|
[quote]My only experience with aircraft tanks is Ercoupes. In that world they can be sloshed or welded. More and more are getting them welded to avoid any problems with sealant. Is that feasible with RV tanks? Ralph FinchDavis, CA [b]
| | - The Matronics RV-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?RV-List |
|
|
|
| Back to top |
|
|
n8zg(at)mchsi.com
Guest
|
| Posted: Mon Aug 04, 2008 5:15 pm Post subject: Leaking QB Tanks |
|
|
No sir –
RV tanks are skinned with 2024-T3.
Not a weldable alloy.
neal
From: owner-rv-list-server(at)matronics.com [mailto:owner-rv-list-server(at)matronics.com] On Behalf Of Ralph Finch
Sent: Monday, August 04, 2008 7:46 PM
To: rv-list(at)matronics.com
Subject: RE: Leaking QB Tanks
| Quote: | | My only experience with aircraft tanks is Ercoupes. In that world they can be sloshed or welded. More and more are getting them welded to avoid any problems with sealant. Is that feasible with RV tanks? Ralph FinchDavis, CA |
012345678901234
[quote][b]
| | - The Matronics RV-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?RV-List |
|
|
|
| Back to top |
|
|
rv9jim(at)juno.com
Guest
|
| Posted: Tue Aug 05, 2008 8:04 am Post subject: Leaking QB Tanks |
|
|
Tim,
I got my response from Van's and it is the same. The accumulated
dye, from evaporation, causes the break down of the sealant when it is
exposed to oxygen from the leaks. Having been in the chemical industry
(sort of) the dye's that are used are often oil based. I was confused
on the first indications of the "blue stuff". It felt like grease and
acted like it. Now, having stood back from the problem, the
accumulation of dye can have a degrading effect on the "Proseal". My
previous aircraft have all used mogas so I was not in the "blue" mode
when the leaks occurred. I now have to remove the cover and put some new
Proseal inside to stop the leaks. Van's also reminded me to use Proseal
on the cover and a bit on the screws to seal it back up. Van's does not
use the cork gaskets on their planes. Just enough to squeeze out upon
tightening the screws. Not squeezed enough to get cover to tank contact.
They say that if you need to remove the cover, the ole putty knife will
'POP' it off.
Jim
____________________________________________________________
Looking for insurance? Click to compare and save big.
http://thirdpartyoffers.juno.com/TGL2141/fc/Ioyw6i3m275YMXfHXPsBxyocOYnO6M0VzgrhIdNYeInezT2i1AOgtF/
| | - The Matronics RV-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?RV-List |
|
|
|
| Back to top |
|
|
rv9jim(at)juno.com
Guest
|
| Posted: Tue Aug 05, 2008 11:43 am Post subject: Leaking QB Tanks |
|
|
Hi Brian,
I guess there should be an item on our check list to put fuel in
the tanks (100LL) for about a week prior to close up and check for leaks.
That way we find any leaks and can stop the exposure of the Proseal to
the dye on the outside of the tank. The tank only needs to have enough
fuel to cover the root rib. Then leaks can be found before you put the
wings on.
Jim
N15JN
____________________________________________________________
Click here to find a massage therapy school near you.
http://thirdpartyoffers.juno.com/TGL2141/fc/Ioyw6i3l9deVZIrV8iEpet2FyycrmxVUDl3rErcmB92aT7o5tABXtB/
| | - The Matronics RV-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?RV-List |
|
|
|
| Back to top |
|
|
|
|
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
|
Get Email Distribution Too!
FAQ
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
