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HomeAircraftHelicopterHelicopter Main Discussion › epoxy for tanks
10-28-2011 07:26 PM  7 years agoPost 1
1hander

rrApprentice

San Antonio, TX

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does any one know as quickly as possible, what epoxy resin i can use to make kevlar fuel tanks... brand specifically that either you or someone you know has used...no hearsay please

Ret. Dis. SSG Gonzales..5th SFG..De Oppresso Liber..Tantum Deus Can Sentio Mihi

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10-28-2011 08:58 PM  7 years agoPost 2
AirWolfRC

rrProfessor

42½ N, 83½ W

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Glow fuel is methyl alcohol, nitromethane and oil
Gasoline is ethyl alcohol and gasoline

http://www.masterbond.com/propertie...ts-and-coatings

http://www.resinlab.com/E85/e85index.html

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10-28-2011 09:00 PM  7 years agoPost 3
1hander

rrApprentice

San Antonio, TX

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I forgot for use with kerosene..I would think same as gasoline

Ret. Dis. SSG Gonzales..5th SFG..De Oppresso Liber..Tantum Deus Can Sentio Mihi

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10-28-2011 09:10 PM  7 years agoPost 4
Cowjock

rrVeteran

Pa.

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kerosene is not the same as gasoline. It's fuel oil.

Damn that ground is hard! When's the right time to get out of this money sucking hobby?

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HomeAircraftHelicopterHelicopter Main Discussion › epoxy for tanks
10-28-2011 09:31 PM  7 years ago •• Post 5 ••
1hander

rrApprentice

San Antonio, TX

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just thought id add, that masterbond has complete Ahole at the desk. I cordially greeted her and asked if they might have a product for my specific application, she asked what that would be , i started to explain, she rudely cut me off and asked what company i was with, i say no company just an individual, then she very condencendingly says "well OOUUURRRR products start at 700 dollars fort a 1/2 a cup of product" i said that wont be a problem.....she put me on hold then hung up...

resinlab didnt fair much better, i asked if the e85 stuff could be thinned out in some manner, and got hung up on too...

where the hell has politeness gone, nevermind customer service ..just good ole fashioned politeness. jeeeezzz

Ret. Dis. SSG Gonzales..5th SFG..De Oppresso Liber..Tantum Deus Can Sentio Mihi

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10-28-2011 09:57 PM  7 years agoPost 6
AirWolfRC

rrProfessor

42½ N, 83½ W

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I called MassterBond and talked to one of their engineering types. The answer is that chemical resistance like you are looking for requires a highly exothermic epoxy (gets hot fast in volume) so the mix batch volumes are limited for a usable pot life which would not be enough for any nominal size FRP (fiber reinforced plastic) application. coating the inside of a tank with such a mix would be easier because less epoxy would be required. This stuff has low elasticity and would be almost brittle. And, yes, the stuff is expensive.

In the past I have seen FRP tanks but don't have any other input for you.

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10-28-2011 10:01 PM  7 years agoPost 7
1hander

rrApprentice

San Antonio, TX

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cool, i have no problem at all with expensive, its the attitude from the receptionist, at any rate its unimportant because its of no use to me...it looks like everyone who has made their own tanks succesfuly with both kerosene and glow fuel, has been using mostly pacer 30 minute or finishing resin, and west system resin which is pretty much chemically the same stuff.

ive read some say it will come apart because its not fuel prood, but in every case the individual did not know first hand

Ret. Dis. SSG Gonzales..5th SFG..De Oppresso Liber..Tantum Deus Can Sentio Mihi

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10-28-2011 10:06 PM  7 years agoPost 8
AirWolfRC

rrProfessor

42½ N, 83½ W

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You may want to look at using vinyl ester resins instead of epoxy.

Now, if you can manage a way to use Polyethylene with your aramid fiber, then I think your problems are gone.

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10-28-2011 10:09 PM  7 years agoPost 9
1hander

rrApprentice

San Antonio, TX

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they require a special kind of thinner to reduce them that i suppopsedly very bad for you

Ret. Dis. SSG Gonzales..5th SFG..De Oppresso Liber..Tantum Deus Can Sentio Mihi

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10-28-2011 10:11 PM  7 years agoPost 10
AirWolfRC

rrProfessor

42½ N, 83½ W

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I'm thinking injection molding with arimid fibers in the mix.

You could also try making the tank and then using a gas tank sealer on the inside of the tank.

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10-28-2011 10:22 PM  7 years agoPost 11
1hander

rrApprentice

San Antonio, TX

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thought about doing that as well, i might just be being overcautious here, guys have been making tanks for their turbines for years using glass and either zpoxy..westsystems,uscomposites,greatplanes resin, etc etc they are all the same thing pretty much as far as fuel resistant...

i really dont want to use any kind of coating, my fear is a clogged filiter in flight, flameout..big problem,,

Ret. Dis. SSG Gonzales..5th SFG..De Oppresso Liber..Tantum Deus Can Sentio Mihi

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10-28-2011 11:04 PM  7 years agoPost 12
AirWolfRC

rrProfessor

42½ N, 83½ W

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Well . . . if you've been doing that all along . . . what's the question ?

The big problem with epoxy tanks seems to be the alcohol and jet fuel doesn't have any.

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10-28-2011 11:09 PM  7 years agoPost 13
1hander

rrApprentice

San Antonio, TX

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nonono....not me . i have not made any yet

i meant most others have been using this types of epoxy

Ret. Dis. SSG Gonzales..5th SFG..De Oppresso Liber..Tantum Deus Can Sentio Mihi

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10-31-2011 04:25 PM  7 years agoPost 14
FLYINFOOL

rrKey Veteran

Cudahy, WI

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You might get better informed answers if you ask this in the turbine forum or go to a plank forum that has a dedicated jet forum. I am sure you will find people there that have made tanks from scratch.

FWIW
I have only repaired a factory Kevlar take that was missing a corner. I used Kevlar cloth and 30 minute Z-Poxy. That was 4 years ago and it is still fine. I never drain the tank, so it has been soaking in fuel for 4 years.


Jeff Borowski
RAMS Club President
www.ramsrcclub.com

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