Today's Message Index:
----------------------
1. 05:46 AM - Re: Leaking QB Tanks (Charles Heathco)
2. 05:48 AM - Re: Leaking QB Tanks (Tim Bryan)
3. 07:37 AM - Re: Leaking QB Tanks (John Cox)
4. 10:23 AM - Re: Leaking QB Tanks (Brian Meyette)
5. 10:29 AM - Re: Leaking QB Tanks (Brian Meyette)
6. 11:04 AM - Re: Leaking QB Tanks (Dale Ensing)
7. 03:23 PM - Re: Leaking QB Tanks (Kelly McMullen)
8. 05:50 PM - Re: Leaking QB Tanks (Ralph Finch)
9. 06:15 PM - Re: Leaking QB Tanks (Neal George)
10. 06:18 PM - RV Fly-In (M54) Lebanon,Tn (John McMahon)
11. 09:18 PM - Ramona, CA RV-6A N51LW for sale (Vanremog@aol.com)
12. 10:18 PM - Northern California Airports - Arcata/Eureka area (Della & Robert Kennett)
Message 1
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| Subject: | Re: 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
Message 2
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| Subject: | Leaking QB Tanks |
>>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
Message 3
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| 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" (tm) 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@matronics.com
[mailto:owner-rv-list-server@matronics.com] On Behalf Of Doug Morrison
Sent: Sunday, August 03, 2008 7:37 PM
Subject: Re: RV-List: 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@net-lynx.com>
<mailto:rv8a.doug@net-lynx.com> wrote:
From: Doug Morrison <rv8a.doug@net-lynx.com>
<mailto:rv8a.doug@net-lynx.com>
Subject: Re: RV-List: Leaking QB Tanks
To: rv-list@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 -8)
Larry Pardue wrote:
<n5lp@warpdriveonline.com> <mailto:n5lp@warpdriveonline.com>
On Aug 3, 2008, at 3:09 PM, James H Nelson wrote:
<mailto:rv9jim@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=seala
nt
href="3D%22http://www.matronics.com/Navigator?RV-List%22">http://www.ma
t
ronics.com/Navigator?RV-List
Message 4
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| 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@matronics.com
[mailto:owner-rv-list-server@matronics.com] On Behalf Of RICHARD MILLER
Sent: Sunday, August 03, 2008 8:50 PM
Subject: Re: RV-List: 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@net-lynx.com> wrote:
From: Doug Morrison <rv8a.doug@net-lynx.com>
Subject: Re: RV-List: 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 -8)
Larry Pardue wrote:
"mailto:n5lp@warpdriveonline.com" \n<n5lp@warpdriveonline.com>
On Aug 3, 2008, at 3:09 PM, James H Nelson wrote:
"mailto:rv9jim@juno.com" \n<rv9jim@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 HYPERLINK
"http:///" \nhttp:// HYPERLINK
"http://www.vansairforce.com/community/showthread.php?t=26159&highlight=seal
ant"
\nwww.vansairforce.com/community/showthread.php?t=26159&highlight=sealant
D========================
=========
D========================
=========
D========================
=========
D========================
=========
Checked by AVG.
12:00 PM
Checked by AVG.
12:00 PM
Message 5
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| 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
-----Original Message-----
From: owner-rv-list-server@matronics.com
[mailto:owner-rv-list-server@matronics.com] On Behalf Of Kelly McMullen
Sent: Sunday, August 03, 2008 9:12 PM
Subject: Re: RV-List: 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:
> 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 -8)
>
>
> Larry Pardue wrote:
>> --> <n5lp@warpdriveonline.com>
>>
>>
>> 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=26159&highlight=seala
>> nt
>>
>>
>>
>>
>>
>>
>>
Checked by AVG.
12:00 PM
Checked by AVG.
12:00 PM
Message 6
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| Subject: | Re: Leaking QB Tanks |
John,
I think you mean polysulfide not polysulfate.
Dale Ensing
----- Original Message -----
From: John Cox
To: rv-list@matronics.com
Sent: Monday, August 04, 2008 10:33 AM
Subject: RE: RV-List: Leaking QB Tanks
Repeating something posted a long time ago. ProSeal is a trademarked nam
e and is often generically used in conversation to identify tank sealant(mu
ch like Scotch Tape or Kleenex). The product is PolySulfate Thixotrophic.
Most of the stuff Van's sells is sealant but is not ProSeal. ProSeal come
s in scores of product viscosities of A, B and C and various temperature an
d 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 "Pro
Seal" T 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 re
mediate.
John Cox
From: owner-rv-list-server@matronics.com [mailto:owner-rv-list-server@mat
ronics.com] On Behalf Of Doug Morrison
Sent: Sunday, August 03, 2008 7:37 PM
To: rv-list@matronics.com
Subject: Re: RV-List: 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 li
ke a good idea.
2) I am fairly confident that oil additives and mogas have never been use
d in my -4 (circa 1993) or my friends -8 QB. The only commonality is that t
he tanks were leaking for an extended period of time.
3) The previous owner of my -4 is fairly confident that the pro-seal he u
sed was fresh and mixed in the proper ratio.
4) The pro-seal on the QB tanks of the -8A I have under construction is f
ull 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 be
gin to leak due to outdated pro-seal used at the time of manufacturer, I wi
ll fix the problem and move on. Of course I will advise Van's of the proble
m 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 b
egin painting and final assembly. Any leaks or pro-seal softening should sh
ow up during that time.
As far as I am concerned, the -8A kit is a real bargain, even with the in
evitable anomalies. Each of you will have to decide if you want to press th
e issue with Van's. Personally, I am prepared to accept a few minor problem
s 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 improperl
y or out of date. excessive heat and time will screwup proseal still in th
e can. since this is a quick build with only 5 hrs on it. i would be reques
ting two new tanks since the other was probably built with the same bad pro
seal. 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 cont
rolls on the container. it is quite possible that the material saw in exces
s 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 stic
k at, so call me if you have to do it yourself. be happy to help with advic
e.
ps
i am replacing the bonded doublers on a exec helicopter rotor blade
s 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@net-lynx.com> wrote:
From: Doug Morrison <rv8a.doug@net-lynx.com>
Subject: Re: RV-List: Leaking QB Tanks
To: rv-list@matronics.com
Date: Sunday, August 3, 2008, 4:41 PM
Gentlemen,
This problem is not just related to the relatively new quick-buil
d tanks. Last week I found the same problem with one of the fuel tanks on a
n RV-4 (1993) I recently purchased. The previous owner (original builder) r
epaired 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 ex
tended 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 l
eaked onto the factory applied proseal on the bottom of the inner rib. [jus
t 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 soone
r.
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 t
he tank, so as the fuel drips onto the proseal, it evaporates and leaves th
e blue dye behind. This will lead to the proseal becoming soft and sticky a
nd 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 ins
pection cover had weeped fuel for 2 months] ,but i still would like a techn
ical 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 Cardi
nal. 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 clearl
y told me they mixed it correctly and that it was my fault it went soft.[fu
el shouldnt leak on it]
I dont want to make a issue about it, but feel a bit short change
d at the moment. Vans has always been great about sorting out issues. I won
der why they are avoiding this one ??
As I said before, if its my fault ,so be it. However everyone I s
peak 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 -8)
Larry Pardue wrote:
.com>
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 pa
rt 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 botto
m and
almost to the leading edge. The pro seal is soft enough to act l
ike
grease. You can wipe it from the aluminum skin. Not firm and s
tiff
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=seal
ant
href="3D%22http://www.matronics.com/Navigator?RV-List%22">http://www.m
atronics.com/Navigator?RV-List
http://www.matronics.com/Navigator?RV-Listhttp://forums.matronics.comhttp
://www.matronics.com/contribution
Message 7
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| Subject: | Re: 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:
>
> 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" ^(TM) 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
>
> *
> *
Message 8
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| Subject: | Leaking QB Tanks |
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 Finch
Davis, CA
Message 9
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| Subject: | Leaking QB Tanks |
No sir -
RV tanks are skinned with 2024-T3.
Not a weldable alloy.
neal
From: owner-rv-list-server@matronics.com
[mailto:owner-rv-list-server@matronics.com] On Behalf Of Ralph Finch
Sent: Monday, August 04, 2008 7:46 PM
Subject: RE: RV-List: Leaking QB Tanks
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 Finch
Davis, CA
Message 10
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| Subject: | RV Fly-In (M54) Lebanon,Tn |
Just to inform every one that we are having again this year our RV
Fly-In
at M54 Lebanon,Tn which is about 20 miles east of Nashville,Tn..Sept
20th
and Mike Seager will be here again Sept 19,20,and 21st with the RV7....
You can E-Mail me and I will try to put you on the list...There are 6
slots a day
and some are gone already...
Thanks
John McMahon (RV6 180/CS)
Message 11
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| Subject: | Ramona, CA RV-6A N51LW for sale |
Socal RVators-
Does anyone have intimate knowledge of this plane based at Ramona, CA?
Apparently it was finished by Leonard Wilhelm in 1994 in Kansas and it is now
owned by Neal Farinholt My Cessna 140 flying buddy is interested and we would
like to know if this plane is a good quality construct, before we make the
trip down there to see for ourselves.
Please respond to me directly.
_vanremog@aol.com_ (mailto:vanremog@aol.com)
N1GV (RV-6A, Flying 898hrs, O-360-A1A, C/S, Silicon Valley)
**************Looking for a car that's sporty, fun and fits in your budget?
Read reviews on AOL Autos.
(http://autos.aol.com/cars-BMW-128-2008/expert-review?ncid=aolaut00050000000017 )
Message 12
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| Subject: | Northern California Airports - Arcata/Eureka area |
We plan to fly down to Northern California in mid September to visit our
grandson and are looking for advice on the best place to land. They live in
the Arcata area and it looks like the options would either be Arcata or
Murray Field. We will probably need to rent a car, as well as have
tie-downs for a few days. We would appreciate any feedback and advice from
listers who are familiar with this area. Please reply off list to
rdkennett@shaw.ca.
Thanks
Rob Kennett
RV-6A C-GRBK
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