X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [216.211.128.10] (HELO mail-in04.adhost.com) by logan.com (CommuniGate Pro SMTP 5.1c.2) with ESMTP id 1330453 for flyrotary@lancaironline.net; Mon, 31 Jul 2006 14:09:05 -0400 Received-SPF: none receiver=logan.com; client-ip=216.211.128.10; envelope-from=joeh@pilgrimtech.com Received: from Pilgrim10 (tide503.microsoft.com [131.107.0.73]) by mail-in04.adhost.com (Postfix) with ESMTP id 61FE3B8B7C for ; Mon, 31 Jul 2006 11:08:48 -0700 (PDT) (envelope-from joeh@pilgrimtech.com) From: "Joe Hull" To: "'Rotary motors in aircraft'" Subject: RE: ***SPAM*** [FlyRotary] Auto Fuel - composite tanks Date: Mon, 31 Jul 2006 11:07:16 -0700 Message-ID: <004601c6b4cc$36566ec0$bc40379d@redmond.corp.microsoft.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0047_01C6B491.89F796C0" X-Mailer: Microsoft Office Outlook 11 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2869 Thread-Index: Aca0xQJ9EvBAUGDwQc2T0fyWN9ia9QABpjmA In-Reply-To: This is a multi-part message in MIME format. ------=_NextPart_000_0047_01C6B491.89F796C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Al, I used MGS epoxy for my tanks and have had fuel in them for about a = year. No leaks. There have been a number of people on the various canard lists that have used EZ-Poxy with and without Mogas and have had no problems whatsoever. = But then again there is always the caveat regarding unknown additives that = get put in without any public notice or testing. =20 Sorry for your troubles =96 but you will overcome I=92m sure! =20 Joe Hull Cozy Mk-IV N31CZ (65 hrs - Rotary 13B NA)=20 Redmond (Seattle), Washington =20 _____ =20 From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen Sent: Monday, July 31, 2006 10:15 AM To: Rotary motors in aircraft Subject: ***SPAM*** [FlyRotary] Auto Fuel - composite tanks =20 Not sure where to go with this because there are only a few here with = epoxy fuel tanks, and on the Velocity list very few interested in the use of mogas. I=92m suspecting fuel compatibility isses. =20 I first put fuel in the tanks nearly 2 years ago and used Chevron = regular. Everything was fine. When I moved the plane to the airport 3 months ago (tanks empty) I filled with Exxon-Mobile. Four troubling things have = come up in the past few weeks.=20 =20 1. I have Vance Atkinson site gauge that has a white plastic back plate for easier reading of the fuel level. The small hole through the backing = has been swelling shut so the sight gauge no longer works. I contacted Vance = who said that there are hundreds of these gauges in EZs using mogas without problems, but he has had 3 incidents like mine in the last three months. = 2. A couple of weeks ago there was suddenly a pinhole leak in one of the gear well enclosures. These enclosures are part of the fuel tank = wall, and are parts that come with the Velocity kit. These are also made and coated with EZ-poxy. 3. Looking in through the filler cap I see reddish-purple splotches and streaks on those gear leg enclosures. Poking and scratching with some safety wire on a stick does not indicate any softness of the surface. 4. Yesterday, under the leading edges of one of the strakes, I noted an area with some slight surface irregularity. Pushing on it suggests some sponginess. This is =BD=94 foam core material, and indicates the = possibility of a pinhole leak in the inner skin, and fuel softening the PVC foam. PVC = foam is supposed to be unaffected by fuel. =20 My tanks (strakes) were made and coated with EZ-poxy back in 1998. At = the time I polled EZ flyers about there experience, and talked to reps of various epoxy manufacturers about auto fuel compatibility. All the = evidence said go with the EZ-poxy. =20 Any others with composite tanks having any trouble? Anybody using Exxon-mobile fuel? Know of any new additives that are an issue? =20 I=92m thinking I should drain this fuel ASAP, but then what? Other = brand? That expensive Avgas? Regardless I may be faced with cutting open a = strake at some point, but right now we are trying to get first flight done this coming weekend. =20 =20 ------=_NextPart_000_0047_01C6B491.89F796C0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Al,

I used MGS epoxy for my tanks and = have had fuel in them for about a year. No leaks.

There have been a number of people = on the various canard lists that have used EZ-Poxy with and without Mogas and = have had no problems whatsoever. But then again there is always the caveat = regarding unknown additives that get put in without any public notice or = testing.

 

Sorry for your troubles – but = you will overcome I’m sure!

 

Joe = Hull

Cozy Mk-IV N31CZ (65 hrs - Rotary = 13B NA)

Redmond (Seattle), Washington

 

From: = Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Al Gietzen
Sent: Monday, July 31, = 2006 10:15 AM
To: Rotary motors in aircraft
Subject: ***SPAM*** = [FlyRotary] Auto Fuel - composite tanks

 

Not sure where to go with this because there are = only a few here with epoxy fuel tanks, and on the Velocity list very few = interested in the use of mogas.  I’m suspecting fuel compatibility = isses.

 

I first put fuel in the tanks nearly 2 years ago = and used Chevron regular. Everything was fine.  When I moved the plane to = the airport 3 months ago (tanks empty) I filled with Exxon-Mobile.  = Four troubling things have come up in the past few weeks. =

 

  1. I have Vance = Atkinson site gauge that has a white plastic back plate for easier reading of the = fuel level. The small hole through the backing has been swelling shut so = the sight gauge no longer works. I contacted Vance who said that there = are hundreds of these gauges in EZs using mogas without problems, but = he has had 3 incidents like mine in the last three months. =
  2. A couple of weeks = ago there was suddenly a pinhole leak in one of the gear well = enclosures.  These enclosures are part of the fuel tank wall, and are parts that = come with the Velocity kit.  These are also made and coated with = EZ-poxy.
  3. Looking in through = the filler cap I see reddish-purple splotches and streaks on those gear leg enclosures.  Poking and scratching with some safety wire on a = stick does not indicate any softness of the = surface.
  4. Yesterday, under the = leading edges of one of the strakes, I noted an area with some slight = surface irregularity.  Pushing on it suggests some sponginess.  = This is =BD” foam core material, and indicates the possibility of a = pinhole leak in the inner skin, and fuel softening the PVC foam.  PVC = foam is supposed to be unaffected by fuel.

 

My tanks (strakes) were made and coated with = EZ-poxy back in 1998.  At the time I polled EZ flyers about there experience, = and talked to reps of various epoxy manufacturers about auto fuel = compatibility.  All the evidence said go with the EZ-poxy.

 

Any others with composite tanks having any trouble?  Anybody using Exxon-mobile fuel?  Know of any new additives = that are an issue?

 

I’m thinking I should drain this fuel ASAP, = but then what?  Other brand?  That expensive Avgas?  Regardless I = may be faced with cutting open a strake at some point, but right now we are = trying to get first flight done this coming weekend.

 

 

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