Gas fuel stopper question
05-21-2008, 04:54 PM
#4
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RE: Gas fuel stopper question
There are some black gas stoppers, but an easy way to check before assembly is to immerse the stopper in a fuel-oil mix. If the stopper develops a "slimey" feel after 10 minutes or so it is not gas compatible. Better to purchase one that's specifically noted to be gasoline compatible. Doing so may save you an airplane where a non compatible stopper can degrade to grossly unacceptable levels on the first flight.
05-21-2008, 06:25 PM
#5
RE: Gas fuel stopper question
Having been severly burnt by using a black coloured stopper that was supposed to be gas compatible, I now use Du Bro brown coloured stoppers exclusively which enjoy an excellent reputation for being truly gas compatable.
Karol
Karol
05-22-2008, 12:09 AM
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RE: Gas fuel stopper question
Hi All
Thanks for all the good advice.
Let me give you an insight in my dilemma. I am building a H9 Twist 150 and want to fit a gas motor. The tank come with a nitro stopper and the manual say you have to replace with gas tubing and stopper. I have about 5 Du-Bro stoppers in my drawer, but guess what, they are a bit to small for the H9 tank. I do have a black stopper that is the same size that is supposed to be a gas stopper as it came with a 50 cc gas Chinese YAK, but I want to be sure before I use it.
I will take Pat Roy's advice to soak it in gas and see what happen.
Thanks for all the good advice.
Let me give you an insight in my dilemma. I am building a H9 Twist 150 and want to fit a gas motor. The tank come with a nitro stopper and the manual say you have to replace with gas tubing and stopper. I have about 5 Du-Bro stoppers in my drawer, but guess what, they are a bit to small for the H9 tank. I do have a black stopper that is the same size that is supposed to be a gas stopper as it came with a 50 cc gas Chinese YAK, but I want to be sure before I use it.
I will take Pat Roy's advice to soak it in gas and see what happen.
05-22-2008, 12:31 AM
#7
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RE: Gas fuel stopper question
If a Dubro stopper is black, it's not gas compatible. Sullivan has or had a black stopper alledged to be gas compatible but it in fact was most definately not. That particular stopper cost a bank full of money in lost aircraft before the problem was discovered.
05-22-2008, 12:40 AM
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RE: Gas fuel stopper question
ORIGINAL: Pat Roy
If a Dubro stopper is black, it's not gas compatible. Sullivan has or had a black stopper alledged to be gas compatible but it in fact was most definately not. That particular stopper cost a bank full of money in lost aircraft before the problem was discovered.
If a Dubro stopper is black, it's not gas compatible. Sullivan has or had a black stopper alledged to be gas compatible but it in fact was most definately not. That particular stopper cost a bank full of money in lost aircraft before the problem was discovered.
05-22-2008, 07:03 AM
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RE: Gas fuel stopper question
ORIGINAL: rambo
Replace tank and stopper with dubro and their brown stopper. Then you rest assured.
Replace tank and stopper with dubro and their brown stopper. Then you rest assured.
05-22-2008, 07:15 AM
#11
RE: Gas fuel stopper question
ORIGINAL: wswanepoel
If the DuBro did fit I would not even have started this thread
ORIGINAL: rambo
Replace tank and stopper with dubro and their brown stopper. Then you rest assured.
Replace tank and stopper with dubro and their brown stopper. Then you rest assured.
Get a Du Bro tank .... problem solved.
Karol
05-22-2008, 07:58 AM
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RE: Gas fuel stopper question
ORIGINAL: karolh
Get a Du Bro tank .... problem solved.
Karol
Get a Du Bro tank .... problem solved.
Karol
but that was not my question.
05-22-2008, 08:25 AM
#13
RE: Gas fuel stopper question
Yes I know you can do that and possibly much more. We all were just trying to help and to guard against you making the same mistake that others have made.
Anyway for sure you now have enough information to make your very own decision.
Karol
Anyway for sure you now have enough information to make your very own decision.
Karol
05-22-2008, 08:30 AM
#14
RE: Gas fuel stopper question
The Dubro gas stopper is Red/Brown and has a raised 0 on its front face.
As Pat has said, don't use Sullivan stoppers thay are not petrol compatable, no matter what it says on the packaging.
Mike
As Pat has said, don't use Sullivan stoppers thay are not petrol compatable, no matter what it says on the packaging.
Mike
05-22-2008, 08:41 AM
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RE: Gas fuel stopper question
I just found out from the agent that the H9 stopper is gas and glow compatible, I only have to replace the fuel line.
05-22-2008, 08:47 AM
#16
RE: Gas fuel stopper question
I would be very careful by sticking to what has been tried and tested, as Sullivan says the very same thing about their black stoppper.
Karol
Karol
05-22-2008, 01:05 PM
#18
RE: Gas fuel stopper question
I recently lost an airplane to this problem. I had a stopper, (it happened to be black), that I thought was "gas safe". Just to be sure, I soaked it in gasoline over night. It was fine the next day, so I used it. The first day's flying went fine. Then the airplane sat for about two weeks before I flew it again. Long story short, the stopper had disintegrated, and caused me to lose the airplane.
I always empty my tank at the end of a flying session, but enough had remained to "eat" the stopper.
Long story short, if you are not sure but you would like to use it, let the sucker soak for a week in gas and then see what it looks like....
AV8TOR
I always empty my tank at the end of a flying session, but enough had remained to "eat" the stopper.
Long story short, if you are not sure but you would like to use it, let the sucker soak for a week in gas and then see what it looks like....
AV8TOR
05-22-2008, 01:23 PM
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RE: Gas fuel stopper question
ORIGINAL: av8tor1977
I recently lost an airplane to this problem. I had a stopper, (it happened to be black), that I thought was "gas safe". Just to be sure, I soaked it in gasoline over night. It was fine the next day, so I used it. The first day's flying went fine. Then the airplane sat for about two weeks before I flew it again. Long story short, the stopper had disintegrated, and caused me to lose the airplane.
I always empty my tank at the end of a flying session, but enough had remained to "eat" the stopper.
Long story short, if you are not sure but you would like to use it, let the sucker soak for a week in gas and then see what it looks like....
AV8TOR
I recently lost an airplane to this problem. I had a stopper, (it happened to be black), that I thought was "gas safe". Just to be sure, I soaked it in gasoline over night. It was fine the next day, so I used it. The first day's flying went fine. Then the airplane sat for about two weeks before I flew it again. Long story short, the stopper had disintegrated, and caused me to lose the airplane.
I always empty my tank at the end of a flying session, but enough had remained to "eat" the stopper.
Long story short, if you are not sure but you would like to use it, let the sucker soak for a week in gas and then see what it looks like....
AV8TOR
05-22-2008, 04:12 PM
#22
RE: Gas fuel stopper question
Sullivan has just released a stopper constructed of viton (flouroelastomer), black in color as are o-rings constructed from viton, part number S449. Based on my work experince with gas turbines, I'm switching to the new Sullivan units, already bought 5, about $4.00 each. I did use the Dubro brown colored stoppers before.
05-22-2008, 04:45 PM
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RE: Gas fuel stopper question
I suffered from the black "gas" stopper from sullivan.. Lasted 10 flights. I didn't want to say anything because I figured maybe it was packaged wrong....
Stick with tried and true brown/red stoppers... they have been packaged right for years.
Stick with tried and true brown/red stoppers... they have been packaged right for years.
