X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail04.syd.optusnet.com.au ([211.29.132.185] verified) by logan.com (CommuniGate Pro SMTP 5.2.6) with ESMTPS id 3077077 for flyrotary@lancaironline.net; Thu, 14 Aug 2008 17:36:59 -0400 Received-SPF: pass receiver=logan.com; client-ip=211.29.132.185; envelope-from=lendich@optusnet.com.au Received: from george (d220-236-219-247.dsl.nsw.optusnet.com.au [220.236.219.247]) by mail04.syd.optusnet.com.au (8.13.1/8.13.1) with SMTP id m7ELaB9E002557 for ; Fri, 15 Aug 2008 07:36:12 +1000 Message-ID: <002101c8fe55$c81da380$6400a8c0@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Tank problem with Mogas vs fouled spark plugs Date: Fri, 15 Aug 2008 07:36:14 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_001E_01C8FEA9.98E260C0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3350 X-Antivirus: avast! (VPS 080814-0, 14/08/2008), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_001E_01C8FEA9.98E260C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Mark / Bill, It's been a while since I researched this but the high strength epoxy = Europa uses to bond wing skins etc. was a premo product, but I unsure = about how it stands up to alcohol. Anyone have some info on that? George (down under) Bill,=20 My big concern is the bond joint attaching the wing skin to the spar = and ribs. Lancair uses Hysol to bond the honeycomb skin to the ribs = during closeout and there is no way to seal the Hysol off from the fuel. = I have seen pictures of where ethanol had attacked the Hysol. I don't = know how long it took or how it was corrected. So, my main concern is = with the Hysol adhesive, not the Jeffco 9700. Mark=20 =20 On 8/14/08, Bill Schertz wrote:=20 The Jeffco 9700 FCR data sheet showed that it is supposed to be = compatible with gas/alcohol mixes. One of my fellow builders tested = some samples with Jeffco coatings, and Aeropoxy in a mix of = gas/15%Alcohol. The Jeffco coating was intact after the soaking, *but* = it did swell some. The Aeropoxy flaked off . So, any pinholes in the Jeffco, and the underlying aeropoxy would be = attacked, leading to a sequential failure as the underlying epoxy was = attacked. Bill Schertz KIS Cruiser #4045 N343BS ----- Original Message ----- From: "Charlie England" = To: "Rotary motors in aircraft" Sent: Wednesday, August 13, 2008 1:26 PM Subject: [FlyRotary] Re: Tank problem with Mogas vs fouled spark = plugs Bill, Do you still have the container of sealer? If so, why not just = look up the product's data sheet or call the manufacturer to see if it's = safe for alcohol? IIRC, the stuff that Van has sold in recent years = (Flamemaster brand) is alcohol safe. At least, the stuff they shipped to = me was. A bigger concern if you used any old aviation style items like = gascolators, is the likelihood of natural rubber gaskets in them. -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html ------=_NextPart_000_001E_01C8FEA9.98E260C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
Mark / Bill,
It's been a while since I researched = this but=20 the high strength epoxy Europa uses to bond wing skins etc. was a = premo=20 product, but I unsure about how it stands up to alcohol.
Anyone have some info on that?
George (down under)

Bill,
My big concern is the bond joint attaching the wing = skin to the=20 spar and ribs.  Lancair uses Hysol to bond the honeycomb skin to = the ribs=20 during closeout and there is no way to seal the Hysol off = from the=20 fuel.  I have seen pictures of where ethanol had = attacked=20 the Hysol.  I don't know how long it took or how it was=20 corrected.  So, my main concern is with the Hysol = adhesive, not=20 the Jeffco 9700.
 
Mark 

 
On 8/14/08, Bill=20 Schertz <wschertz@comcast.net> = wrote:=20
The=20 Jeffco 9700 FCR data sheet showed that it is supposed to be = compatible with=20 gas/alcohol mixes.  One of my fellow builders tested some = samples with=20 Jeffco coatings, and Aeropoxy in a mix of gas/15%Alcohol.  The = Jeffco=20 coating was intact after the soaking, *but* it did swell some. The = Aeropoxy=20 flaked off .

So, any pinholes in the Jeffco, and the = underlying=20 aeropoxy would be attacked, leading to a sequential failure as the=20 underlying epoxy was attacked.

Bill Schertz
KIS Cruiser=20 #4045
N343BS
----- Original Message ----- From: "Charlie = England"=20 <ceengland@bellsouth.net>
To: "Rotary = motors in=20 aircraft" <flyrotary@lancaironline.net>
Sent: = Wednesday, August=20 13, 2008 1:26 PM
Subject: [FlyRotary] Re: Tank problem with Mogas = vs=20 fouled spark plugs


Bill,

Do=20 you still have the container of sealer? If so, why not just look = up the=20 product's data sheet or call the manufacturer to see if it's safe = for=20 alcohol? IIRC, the stuff that Van has sold in recent years = (Flamemaster=20 brand) is alcohol safe. At least, the stuff they shipped to me = was. A=20 bigger concern if you used any old aviation style items like = gascolators,=20 is the likelihood of natural rubber gaskets in=20 them.


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Homepage:  http://www.flyrotary.com/
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