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I'm unable to find anything to substantiate this water
theory. If you find something, let me know. Here's a pretty good
link:
-al wick
Resistance to Aggressive Environments
Resistance to
corrosion in aggressive environments is one of the primary reasons for
specifying fiberglass tanks or piping. Typical types of corrosion do not affect
fiberglass. This would include galvanic, aerobic, pitting and inter-granular
corrosion which harms metals but not fiberglass. Although fiberglass resists a
wide range of chemicals and temperatures, it requires the right design,
fabrication and installation to match the appropriate application. For example,
fiberglass may be subject to chemical attack from hydrolysis, oxidation,
pyrolysis or incompatible solutions. The proper resin/glass matrix will minimize
chemical attack.
Al,
I guess ( if it is not so, I apologize for the
assumption and bring into play myself :)), Jarrett wanted to point out the
(possible) change of properties of the Gas/Fuel/Water mix.
I understand ( assume) that each by itself is less
problematic.
Mix Fuel with Alcohol and it starts to eat tanks,
rubber, O-rings, etc.
Bring some water into the mix and the eating becomes a
feast!
Plain - it seems the alcohol makes the mix more
agressive and water does it again.
Water and Fuel WITHOUT Alcohol doesn't seem to be a
problem (chemically...).
So the question is: How much does Water aggravate the
Fuel/Alcohol problem?
Thomas J.
----- Original Message -----
Sent: Wednesday, January 18, 2006 10:12
AM
Subject: [FlyRotary] Re: Auto
fuel
No, never heard that theory before. I've had auto fuel in my tanks
since day one. Alcohol has great affinity for water, real quick to absorb
it. That's how you test for alcohol content. Add water, swirl. So that's the
other less scientific test.
-al wick
Al, were these experiments done at some point with some level of water
included in the fuel? It's my understanding that with water mixed in it
becomes an even bigger Bear to contain due to some chemical reaction.
Curious...but still building in Fiberglass...
Jarrett Johnson
> No, I wasn't speaking of polyester. You can buy epoxies of
different
> ratios. I'm told by expert (Gary Hunter) that all
epoxies which use
> ratios like 80/20 have significantly better
mechanical and chemical
> properties. This is measurable, and
agrees with my and other peoples
> tests. Like I say, I tested all
of the fuel tank components in various
> batches of alcohol fuel
for years (you know how I don't like design
> assumptions). None of
the components were affected. The only exception
> was when I
exposed 50/50 epoxy mix to fuel. It slowly got mushy.
>
> I
have seen fuel tanks destroyed, leaking like a sieve from
>
exposure to
> alcohol fuel. One reportedly had old version of
proseal inside. It
> completely peeled off tank inside. Clogged
fuel port. Forced
> landing. If
> memory serves me correct,
it also had poly that degraded by
> erosion. It
> looked
like someone had etched the poly out of the tank.
>
>
> -al wick
> Artificial intelligence in cockpit, Cozy IV
powered by stock
> Subaru 2.5
> N9032U 200+ hours on
engine/airframe from Portland, Oregon
> Prop construct, Subaru
install, Risk assessment, Glass panel
> design info:
>
http://www.maddyhome.com/canardpages/pages/alwick/index.html
>
>
> On Wed, 18 Jan 2006 20:07:41 +1000 "george lendich"
> <lendich@optusnet.com.au> writes:
> Al,
> You
must be speaking about Polyester as Epoxy must absolutely
>
maintain a
> strict ration mix, as per manufacturers instructions,
to allow proper
> molecule to molecule bonding of the hardener and
the resin.
> Polyester on
> the other hand has flexibility
in that, more hardener promotes
> hardeningsooner.
> George
(down under)
> I tested the hell out of that. No effect. Years of
exposure to
> differentbatches of known alcohol. I understand that
if you use a
> resin of high
> proportions of hardener to
resin, it's resistant. If you use
> 50/50, it
> isn't. I had
50/50 get soft from fuel exposure.
> This info consistent with all
the other guys that did the same test.
>
>
> -al wick
> Artificial intelligence in cockpit, Cozy IV powered by stock
> Subaru 2.5
> N9032U 200+ hours on engine/airframe from
Portland, Oregon
> Prop construct, Subaru install, Risk assessment,
Glass panel
> design info:
>
http://www.maddyhome.com/canardpages/pages/alwick/index.html
>
> On Tue, 17 Jan 2006 22:21:34 -0600 "William"
<wschertz@ispwest.com>
> writes:
> It will make it
less attractive for those with fiberglass tanks.
> Alcohol/gas
mixes are more aggressive than either gas or alcohol
> alone.Bill
Schertz
> KIS Cruiser # 4045
> ----- Original Message -----
> From: John Downing
> To: Rotary motors in aircraft
> Sent: Tuesday, January 17, 2006 8:17 PM
> Subject:
[FlyRotary] Auto fuel
>
>
> By the Farm Bureau Paper
it is stated that Wisconsin has passed a law
> that all 87 no lead
will contain 10% alcohol and that nine other
> statesare
considering it. It didn't mention the other no lead
>
grades. Here in
> Michigan it is under consideration at this
time, and there is a good
> chance it pass. Other than
cutting the power some what, is going to
> effect the operation of
the rotary in some other way. JohnD
>
>
>
> -al wick
> Artificial intelligence in cockpit, Cozy IV
powered by stock
> Subaru 2.5
> N9032U 200+ hours on
engine/airframe from Portland, Oregon
> Prop construct, Subaru
install, Risk assessment, Glass panel
> design info:
>
http://www.maddyhome.com/canardpages/pages/alwick/index.html
>
--
Homepage: http://www.flyrotary.com/
Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/
-al wick
Artificial intelligence in
cockpit, Cozy IV powered by stock Subaru 2.5
N9032U 200+ hours on
engine/airframe from Portland, Oregon
Prop construct, Subaru install,
Risk assessment, Glass panel design
info:
http://www.maddyhome.com/canardpages/pages/alwick/index.html
-al wick
Artificial intelligence in
cockpit, Cozy IV powered by stock Subaru 2.5
N9032U 200+ hours on
engine/airframe from Portland, Oregon
Prop construct, Subaru install, Risk
assessment, Glass panel design
info:
http://www.maddyhome.com/canardpages/pages/alwick/index.html
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