REFLECTOR: fuel

[John Dibble]

The culprits are oxygen containing hydrocarbons which are present in 
most car gasolines, not avgas.  How much the foam is affected varies 
with the specific additive, the concentration of the additive and the 
type of foam.  I did some testing 10 years ago on the blue foam and as I 
recall regular gasoline was not a problem, but the additives in pure 
form were.  It would be simple for someone with some blue foam to test 
with different gasolines.

John

On 3/13/2012 10:48 AM, jerry at jlbent.com wrote:
> I had heard that the additve was xylene, but I can't confirm that.  
> Just a rumor
> Jerry Brainard
> Jerry at JLBEnt.com
>
>
>
> 	-------Original Message-------
> From: nmflyer1 at aol.com
> To: medawson250 at yahoo.com, reflector at tvbf.org
> Subject: Re: REFLECTOR: fuel
> Sent: Mar 13 '12 9:22am
>
> Mike,
> I'd like to know just what "additives" are causing the problem. If you 
> look at the Jeffco materials data sheet, you can see that certain 
> alcohols can be an issue.
> Now I burn mostly MOGas in my Cherokee 235, and can blend my own fuel 
> for the Velocity. That being said, I Do Not ever use MOGas with 
> Alcohol in it. I have 2 places that I can get "clean gas" without 
> alcohol in it. I use my 100 Gallon fuel trailer to bring it home.
> I don't really see a reason why one could not burn 100LL all the time 
> (other than cost), but I don't have the experience that others may have.
> Kurt
>
>
>
> -----Original Message-----
> From: Mike Dawson
> To: Velocity Aircraft Owners and Builders list
> Sent: Tue, Mar 13, 2012 6:35 am
> Subject: REFLECTOR: fuel
>
> To all autoconversion builders and owners. I have been told that the 
> additives now found in auto / mogas is eating the blue foam in our 
> fuel tanks. Futher, rumor has it that Bill Mulroney is rebuilding his 
> fuel tanks due to detioration of same. Apparently the molecular 
> structure of the additives, which I do not know, are small enough to 
> penetrate the Jeffco sealant and eat the foam. So Dave Bertram, Kurt 
> Winkler and all others with auto conversions, what is the plan? 100LL 
> with TCP? Untill the EPA outlaws it? Are there places to get clean 
> auto gas?
> Open to suggestions...except put a Lycoming in it.
> Mike
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