Received-SPF: none
 receiver=logan.com; client-ip=203.24.100.45; envelope-from=lendich@aanet.com.au
Message-ID: <1626633401484900848AFC6B6978A813@ownerf1fc517b8>
From: "George Lendich" <lendich@aanet.com.au>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
References: <list-3836871@logan.com>
Subject: Re: [FlyRotary] Re: Vinyl Ester tanks
Date: Thu, 17 Sep 2009 17:42:04 +1000
MIME-Version: 1.0
Content-Type: text/plain;
	format=flowed;
	charset="iso-8859-1";
	reply-type=response
Content-Transfer-Encoding: 7bit

Steve doesn't it go Methanol, Ethanol, Butanol in the BTU rating - isn't it 
still a alcohol and isn't alcohol the thing that kills epoxy?
George ( down under)

> (sorry, but the chart mentioned below is too big.  If you want a copy, 
> let me know and I'll email direct.)
>
> Yes, but there are many formulations of vinyl ester.  My entire  airplane 
> is made from vinyl ester, including the wet-wing gas tanks.   The formula 
> used from the factory was Derakane 411-45.  I switched to  Derakane 
> 411-350 some time later as it was a little more viscous and  wetted out 
> better.  It was also easier to get.  However, if you look  at the attached 
> Derakane Chemical Resistance Guide, the 411 series is  not recommended for 
> gasohol concentrations greater than 10% ethanol.   Since I cannot do 
> anything about my tanks at this point, I am forced  to live with the 
> limitations of Derakane 411.
>
> I don't know what the specifications are on the fiberglast resins, but 
> those who use it ought to know.  For me, E85 is clearly not in the  cards. 
> Another possible option is butanol.  There are some who are  experimenting 
> with butanol as a 100% replacement for 100LL.  It has  nearly the same 
> octane rating as 100LL, and about 90% of the total  energy, per gallon, of 
> gasoline.  Ethanol only has about 60% of the  energy, per gallon, of 
> gasoline.  And butanol does require a different  air-fuel ratio.  It is 
> also not corrosive in the same way as ethanol.
>
> So, my concern remains.  It looks like using gasohol with a 10% lace  of 
> ethanol will be OK.  More than that, I'll be switching to 100LL.
>
> Best Regards,
>
> Steve Thomas
> _______________________________________________________
>
>
>
>
>
> On Sep 4, 2009, at 11:32 AM, Lynn Hanover wrote:
>
>> Or, what are the tanks holding E-85 made out of? About 75% alcohol
>> .All of the underground fuel tanks are now Vinyl Ester.
>>
>> Lynn E. Hanover
>
>
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub: 
> http://mail.lancaironline.net:81/lists/flyrotary/List.html
>