X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nm11-vm6.access.bullet.mail.gq1.yahoo.com ([216.39.63.159] verified) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTPS id 6420761 for flyrotary@lancaironline.net; Fri, 16 Aug 2013 07:23:34 -0400 Received-SPF: none receiver=logan.com; client-ip=216.39.63.159; envelope-from=echristley@att.net Received: from [216.39.60.175] by nm11.access.bullet.mail.gq1.yahoo.com with NNFMP; 16 Aug 2013 11:23:00 -0000 Received: from [67.195.14.95] by tm11.access.bullet.mail.gq1.yahoo.com with NNFMP; 16 Aug 2013 11:23:00 -0000 Received: from [127.0.0.1] by smtp110.sbc.mail.gq1.yahoo.com with NNFMP; 16 Aug 2013 11:23:00 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=att.net; s=s1024; t=1376652180; bh=cuWsBsdpFDdyX6QazrxtnJW62gW85D1ueQ4m2p2lRDg=; h=X-Yahoo-Newman-Id:X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:X-Rocket-Received:Message-ID:Date:From:Reply-To:User-Agent:MIME-Version:To:Subject:References:In-Reply-To:Content-Type; b=LAE6m8zrEWO98Du9Cw/YuZ2d8t0OKgSbz9TAjFBq3QzPzEonMtLGOZQzEVDrPlZ6dXT7OUShs8LRKAh4DaCo7N5rk3hrcwiYDN7K3dj9i2oTDST5wOPJnAx+/tbTzTofsAaO8ISvxNsLcfZWVaVOBLBfn3uJY1D/oNrJHGffC6U= X-Yahoo-Newman-Id: 846272.11882.bm@smtp110.sbc.mail.gq1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: 8hmUPn4VM1kv5IpCHnrlb_wV2jkbu9tzdGJSZ2SIxlZuMnQ XE8IAN6tCD4Q_87elSnqL8OuDURtOCzAGASdIFF4_Rd4bH1ayHzkopcsEvCs Afv00UoX2KBusBTgv3a_v_WMFY2BHaGug7QU7SjupDD2Mv_eGuSiYhjn70yt 4Y8vPl8yNckpf4G33Wm13LmLolQ6v2YR6rzBe0Ic5ZaWWmaTwu7wxv.SwlCf RyxXMAqWVJvH8j2wxij6Zu2jhR.LB9FcR2XPGj5GEuHXvE23_E0ZRNdBQG4z MlrDCSRZ6pwYfEjSeOJe5nsz2KKU49o74Ut8PdYJPlhSk7t.s9JQ0lHG6drr GnilfuaqeCtiDPVWD9zZE_zjgg8V5tNf7x69Fq5qGpxx9CRNjO1M2oeXo71V N7tS.rf6406cV0g46MplCHa6yflGK7.p9TyFG9B0x5Ta4EU2XjcAgsETvsA_ i9GsWlk.mQVBUAVrQHTtqMuIFsv_.v5E6LoVLE2jFbSotRr6sJxyuIXamwC6 h..fwp.mwDrOBpJNHNz3k01kga0KLjRY4kTp7nA1qIk7fPCiZBuoiGlCOAAJ 9tiPg4_1GUzrEN_gdeK_0bahzLhCwXUwW577YYQYIIvUqRSx9OssVcP9a2ml CEvlyxEB705S3TL8C9eMUTyfXuycfZ0_rq2etAoPNsUYjZgILVqz3tx1_.nw weg-- X-Yahoo-SMTP: 40RP3pGswBDvPav1a.I8eMv.KS8bdgWBnCloVoKaow-- X-Rocket-Received: from [192.168.1.10] (echristley@174.97.249.0 with plain) by smtp110.sbc.mail.gq1.yahoo.com with SMTP; 16 Aug 2013 04:23:00 -0700 PDT Message-ID: <520E0B94.8090802@att.net> Date: Fri, 16 Aug 2013 07:23:00 -0400 From: Ernest Christley Reply-To: echristley@att.net User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130804 Thunderbird/17.0.8 MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Re: Fuel tank repair References: In-Reply-To: Content-Type: multipart/alternative; boundary="------------070700070901080005070706" This is a multi-part message in MIME format. --------------070700070901080005070706 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit I think this is going to be the solution, Lynn. The tank isn't exactly smooth at the outlet, so I'm going to have to make some modifications to the general concept, and I may end up with a bit of unusable fuel, which I don't have now. But, I have a bulkhead fitting on hand, so I'll at least give it a try. On 08/15/2013 12:41 PM, Lehanover@aol.com wrote: > *If the tank is smooth on the inside. You could hand ream the hole out > to big enough for a bulkhead fitting. The long run of the fitting > would go into the tank. Make up a thick aluminum disc, big enough to > cover the crack. Use fuel tank sealer in the hole and under the > washer. Tighten the jamb huts with sealant under each.* > *You could have the same washer under the bottom side as well. * > *Now the crack is covered top and bottom with sealant and washers. > Trim off any excess fitting and radius inlet to improve flow. The > fitting can now be pointed in any direction. I can make a drawing if > you need one.* > *Lynn E. Hanover* > ** > ** > ** > In a message dated 8/15/2013 10:30:37 A.M. Eastern Daylight Time, > echristley@att.net writes: > > The Delta has one ~50gal tank that sits behind the back seat. Not > wishing to fight the compatibility issues between epoxies and > whatever > the government may mandate be put into our fuel supply next year, > I went > with an welded up aluminum tank which I epoxied into the turtleback. > > For fittings, I welded in two NPT adapter bungs to the bottom of the > tank. One for fuel supply, and one for return. I had a small, > seeping > leak at the supply fitting. I needed to turn the NPT-to-AN6 90 degree > adapter one more turn to make it seal. I got it most of the way > around > before I heard a sharp ping. The bung that I welded in is now split. > And that split is guaranteed to expand with vibration. > > The only solution I can think if is to cut a round hole to remove the > bung, and then construct two plates (one for the inside of the > tank and > one for the outside), with a hole in the center for the 90 degree > adapter. The problem is, the tank can now be viewed as a bomb. > How can > I cut a hole in the bottom of the tank, which will require that I > work > in an enclose space, without the possibility of a spark making short > work of everything? > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > --------------070700070901080005070706 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit
I think this is going to be the solution, Lynn.  The tank isn't exactly smooth at the outlet, so I'm going to have to make some modifications to the general concept, and I may end up with a bit of unusable fuel, which I don't have now.  But, I have a bulkhead fitting on hand, so I'll at least give it a try.


On 08/15/2013 12:41 PM, Lehanover@aol.com wrote:
If the tank is smooth on the inside. You could hand ream the hole out to big enough for a bulkhead fitting. The long run of the fitting would go into the tank. Make up a thick aluminum disc, big enough to cover the crack. Use fuel tank sealer in the hole and under the washer. Tighten the jamb huts with sealant under each.
You could have the same washer under the bottom side as well.
Now the crack is covered top and bottom with sealant and washers. Trim off any excess fitting and radius inlet to improve flow. The fitting can now be pointed in any direction.  I can make a drawing if you need one.
 
Lynn E. Hanover  
 
 
 
In a message dated 8/15/2013 10:30:37 A.M. Eastern Daylight Time, echristley@att.net writes:
The Delta has one ~50gal tank that sits behind the back seat.  Not
wishing to fight the compatibility issues between epoxies and whatever
the government may mandate be put into our fuel supply next year, I went
with an welded up aluminum tank which I epoxied into the turtleback.

For fittings, I welded in two NPT adapter bungs to the bottom of the
tank.  One for fuel supply, and one for return.   I had a small, seeping
leak at the supply fitting. I needed to turn the NPT-to-AN6 90 degree
adapter one more turn to make it seal.  I got it most of the way around
before I heard a sharp ping.  The bung that I welded in is now split. 
And that split is guaranteed to expand with vibration.

The only solution I can think if is to cut a round hole to remove the
bung, and then construct two plates (one for the inside of the tank and
one for the outside), with a hole in the center for the 90 degree
adapter.  The problem is, the tank can now be viewed as a bomb.  How can
I cut a hole in the bottom of the tank, which will require that I work
in an enclose space, without the possibility of a spark making short
work of everything?

--
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