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1. 12:22 PM - Re: Glasair-List Digest: 2 Msgs - 09/18/07 (John Markey)
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| Subject: | Re: Glasair-List Digest: 2 Msgs - 09/18/07 |
Hydrocarbons and alcohols will indeed leach different types of monomers and oligomers
- both are low molecular weight base chemistries for reactive resin systems.
However, when properly formulated and reacted - i.e., cured - these materials
no longer exist but are bound up in and make the highly crosslinked matrix
that is also reacted to the glass [or carbon fiber or aramid, etc.]. The original
epoxy systems had issues with toxicity, reactivity and formulation, but
these same systems today are routinely used if not for the actual tank then as
the sealants around the seams of metalized tanks. These same vinyl ester systems
are also used to make industrial chemical tanks.
A prudent builder will always flush a new vinyl ester fiberglass tank out with
solvent before using it in a critical flight test. But there is little reason
to not consider testing and using E85 in a composite fuel tank system.
As for the water issue, a correctly formulated E85 is no worse than standard
AvGas. Go read the original CAFE reports.
More of this can be read by Goggling the topic. Som links to start on:
http://www.age85.org/PressReleases/index.cfm
http://txskyways.com/
john
Glasair-List Digest Server <glasair-list@matronics.com> wrote:
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________________________________ Message 2 _____________________________________
Time: 01:28:06 PM PST US
From: Craymondw@aol.com
Subject: Glasair-List: Fuel tanks
Ethanol leaches resin out of fiberglass. And Ethanol absorbs water.
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