REFLECTOR: EZ poxy & ethanol

Sat Jun 4 08:33:28 CDT 2011

Tom,

Many years ago I coated my tanks with Jefco and to this day it looks like new.  However, I carefully sanded all of the tank including the baffles surfaces and wiped them down with denatured alcohol and let them dry.  The Jefco was mixed in 16 oz cups and its working life was about 15 minutes at the high Florida temperatures.  I didn't use a brush I dumped the cup in the tank and used a plastic spreader to spread it around so the layer was thick. I did test strips for a month in straight alcohol with no observed problems.   It worked very well.

Jim

James F. Agnew
Jim_Agnew_2 at Yahoo.Com
Tampa, FL
Velocity 173 Elite Aircraft Completed & Flying

From: John Dibble <aminetech at bluefrog.com>
>To: Velocity Aircraft Owners and Builders list <reflector at tvbf.org>
>Sent: Saturday, June 4, 2011 9:09 AM
>Subject: Re: REFLECTOR: EZ poxy & ethanol
>
>
>Tom, 
>You should weigh the fiberglass before and after to check for weight gain/loss.  The scale you use should read down to 1% of the sample weight.  Also, the issue may not be just the effect on the coating, but on it's adherence to the fiberglass.  To evaluate this I suggest you leave part of the fiberglass uncoated to see if the mogas gets in between the coating and the fiberglass. 
>John 
>Tom Falls wrote: 
>Thanks John, that is reassuring. Reading that some on this list are having trouble with the Jeffco after 5-6 years is a concern, especially after I just finished (yesterday!!) completely coating the right strake with the Rhino 9700. I think I?ll take a piece of cured fiberglass and coat it with the Rhino 9700 and then submerse it in 10% ethanol mogas and leave it there for weeks/months just to be sure. I?ll report back what I find.
>>Tom 
>>From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of John Dibble
>>Sent: Friday, June 03, 2011 8:14 PM 
>>To: Velocity Aircraft Owners and Builders list 
>>Subject: Re: REFLECTOR: EZ poxy ? ethanol
>>Weight gain (or loss) is a measure of the effect of the ethanol.  Zero gain means no effect and that is ideal.  Weight gain typically results in a softening of the material.  Weight loss means the ethanol is removing something, typically plasticizers, making the material more brittle.  The chart also lists gasohol, which represents a range of ethanol/gasoline blends, 10% being most common.  Since no weight gain is indicated, it appears that 10% ethanol should not be a problem.  
>>John  
>>Tom Falls wrote:  
>>I am currently in the process of coating my tanks with Rhino 9700 (formerly Jeffco ). Although I have no intention of using fuels with ethanol, I do plan on using 98 octane and 100LL. Attached is the data sheet for Rhino 9700. Under chemical resistance, pure Ethyl Alcohol (Ethanol) is listed with a 6.9% weight gain after 3 weeks. I don?t know if this means a failure or not . . . . but again it?s 100% Ethanol. Any chemical types out there that can tell us what ?% weight gain? really means?
>>>Tom
>>>From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Velocity 
>>>Sent: Friday, June 03, 2011 2:02 PM 
>>>To: Velocity Aircraft Owners and Builders list 
>>>Subject: Re: REFLECTOR: EZ poxy ? ethanol
>>>I had a very similar experience with pump gas. Melted my optical sump sensor 
>>>and pealed the jefco  in the sump. I could not tell you if it was the 
>>>Ethanol because they put so much crap in our gas 
>>>here in Chicago. But some thing in the gas station pump gas 
>>>is not good for our tanks. 
>>>The epoxy was not effected by the gas just the jefco pealed. Makes me question the Jeffco
>>>Ron
>>>----- Original Message ----- 
>>>>From: Alex Balic
>>>>To: 'Velocity Aircraft Owners and Builders list'
>>>>Sent: Friday, June 03, 2011 11:38 AM
>>>>Subject: Re: REFLECTOR: EZ poxy ? ethanol
>>>>I had a similar problem as Chris- although I did not put any mogas in my mains, I had my sump filled with 89 pump gas for engine testing, and after about 6 months, I noticed gas weeping from the bottom- so I  pulled it and the Jeffco had become soft and pasty- not sure what happened there, I re-built the sump using a new batch of Jeffco, but have been running on 100ll since just to make sure there is no problem?.. I will try the auto fuel again at some point?
>>>>From: reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] On Behalf Of Laurence Coen
>>>> 
>>>>Peter,
>>>>You are not the first to warn people about EZ poxy and ethanol and I doubt that you will be the last.  I refer you to Al Gietzens' email where he has 6 years experiences with ethanol containing fuel in his EZ poxy tanks without a problem.  I personally tested a strip sealed in a container with denatured alcohol with no apparent effect after 6 months. Despite all the warnings, I have never seen or herd of any documented evidence that would indicate that EZ poxy is adversely affected by ethanol containing fuel.  If you have a reference, please share it with the group.
>>>>Larry Coen
>>>>N136LC
>>>>From: Peter Braswell
>>>>Sent: Friday, June 03, 2011 10:26 AM
>>>>To: Velocity Aircraft Owners and Builders list
>>>>Subject: Re: REFLECTOR: Fuel Tank Questions
>>>>Mark, 
>>>>That almost certainly sounds like the EZ poxy that ships with the kit and NOT Jeffco (the really good stuff). 
>>>>My understanding is that the EZ poxy holds up just fine with aviation fuel but I'd be VERY hesitant to use it in conjunction with fuel containing ethanol.
>>>>I may have missed, but are you flying an auto conversion?
>>>>Peter
>>>>
>>>>-------------------------------------------------------------- 
>>>>Check out:  
>>>>?It's a Jungle Up There?: www.zuluworks.com
>>>>Selling your Airplane? : www.fly-mart.com
>>>>Great Aviation Gear: www.sky-gadgets.com
>>>>
>>>>My blog: www.icekreamkoan.com 
>>>>--------------------------------------------------------------  
>>>>On Fri, Jun 3, 2011 at 11:07 AM, Markinchampions ?markinchampions at gmail.com? wrote:
>>>>It appears as a dark brownish red color.Sent from my iPod.  
>>>>  
>>>>On Jun 3, 2011, at 10:21 AM, ?Al Gietzen? ?ALVentures at cox.net? wrote:  
>>>>I don't know what was used. I didn't build it and I'm not that familiar with fiberglass.  
>>>>EZ-poxy is the epoxy system that Velocity sent with the kits; and is most likely what was used.  Shine a light in the tank ? should be a yellow/brown/gold color if EZ-poxy, gray if Jeffco. 
>>>>Al 
>>>>_______________________________________________ 
>>>>>
>>>>>To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector 
>>>>>Visit the gallery!  www.tvbf.org/gallery 
>>>>>user:pw = tvbf:jamaicangoose 
>>>>>Check new archives: www.tvbf.org/pipermail 
>>>>>Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
>>>>
>>>>_______________________________________________ 
>>>>To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector 
>>>>Visit the gallery!  www.tvbf.org/gallery 
>>>>user:pw = tvbf:jamaicangoose 
>>>>Check new archives: www.tvbf.org/pipermail 
>>>>Check old archives: http://www.tvbf.org/archives/velocity/maillist.html 
>>>>_______________________________________________
>>>>
>>>>To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector 
>>>>Visit the gallery!  www.tvbf.org/gallery 
>>>>user:pw = tvbf:jamaicangoose 
>>>>Check new archives: www.tvbf.org/pipermail 
>>>>Check old archives: http://www.tvbf.org/archives/velocity/maillist.html 
>>>>_______________________________________________
>>>>
>>>>To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector 
>>>>Visit the gallery!  www.tvbf.org/gallery 
>>>>user:pw = tvbf:jamaicangoose 
>>>>Check new archives: www.tvbf.org/pipermail 
>>>>Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
>>>>Sent: Friday, June 03, 2011 11:16 AM 
>>>>To: Velocity Aircraft Owners and Builders list 
>>>>Subject: Re: REFLECTOR: EZ poxy ? ethanol
>>> 
>>>_______________________________________________
>>>To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector
>>> 
>>>Visit the gallery!  www.tvbf.org/gallery
>>>user:pw = tvbf:jamaicangoose
>>>Check new archives: www.tvbf.org/pipermail
>>>Check old
 archives: http://www.tvbf.org/archives/velocity/maillist.html
>>_______________________________________________
To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector Visit the gallery!  www.tvbf.org/gallery
user:pw = tvbf:jamaicangoose Check new archives: www.tvbf.org/pipermail
Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
>_______________________________________________
>To change your email address, visit http://www.tvbf.org/mailman/listinfo/reflector
>
>Visit the gallery!  www.tvbf.org/gallery
>user:pw = tvbf:jamaicangoose
>Check new archives: www.tvbf.org/pipermail
>Check old archives: http://www.tvbf.org/archives/velocity/maillist.html
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.tvbf.org/mailman/private/reflector/attachments/20110604/06b706f3/attachment-0001.htm>