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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
>
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