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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
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