X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 30 Jul 2013 17:45:17 -0400 Message-ID: X-Original-Return-Path: Received: from mail-ye0-f175.google.com ([209.85.213.175] verified) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTPS id 6397317 for lml@lancaironline.net; Tue, 30 Jul 2013 17:27:06 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.213.175; envelope-from=toddlong1@gmail.com Received: by mail-ye0-f175.google.com with SMTP id m9so1996992yen.20 for ; Tue, 30 Jul 2013 14:26:32 -0700 (PDT) X-Received: by 10.236.101.65 with SMTP id a41mr2126623yhg.116.1375219592454; Tue, 30 Jul 2013 14:26:32 -0700 (PDT) X-Original-Return-Path: Received: from [10.245.2.234] (50.sub-174-251-96.myvzw.com. [174.251.96.50]) by mx.google.com with ESMTPSA id x52sm94040085yhh.18.2013.07.30.14.26.30 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 30 Jul 2013 14:26:31 -0700 (PDT) Subject: Re: [LML] Re: How to find the leak - another method References: From: Todd Long Content-Type: multipart/alternative; boundary=Apple-Mail-DF1A2E70-99F5-4451-9E0B-3E1D0E0DEC49 X-Mailer: iPhone Mail (10B329) In-Reply-To: X-Original-Message-Id: <849A06BC-0A52-4D8A-A840-5ACBA9DD26D2@gmail.com> X-Original-Date: Tue, 30 Jul 2013 16:26:28 -0500 X-Original-To: Lancair Mailing List Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) --Apple-Mail-DF1A2E70-99F5-4451-9E0B-3E1D0E0DEC49 Content-Type: text/plain; charset=windows-1251 Content-Transfer-Encoding: quoted-printable Here is how we find pinhole leaks in fuel cells simply put a drop of ammonia= in the inflation line. Soak a soft white rag in litmus solution. Or make yo= ur own using red cabbage and lime. If interested I can explain how. Inflate.= And hold the rag over the seal. Turns purple over the tiniest of pinholes. N= o freon or sniffer to buy. Almost free.=20 Typing and grammar errors courtesy of Siri and the iPhone. On Jul 30, 2013, at 15:33, Ted Noel wrote: > Brilliant! >=20 > Same concept, easier application. To fill the seal, inflate with Freon and= deflate. Repeat twice. You'll be at about 90% Freon in the seal when the ne= xt cycle is done. If you want to get rid of the ambient Freon, a fan will wo= rk well. >=20 > Ted Noel >=20 >=20 > On 7/30/2013 11:59 AM, Jim Nordin wrote: >> I don=92t know why the method of finding leaks in fuel tanks should not w= ork for the seal. But read this and it might give you an idea of how to find= the leak without smoke, water =96 anything other than a non-volatile gas. >> =20 >> Realize this hasn=92t been tested on a seal so it may be only a =93good t= hought=94 of getting it done. >> Use of a Freon sniffer. >> Purge the seal. Flush the inside of the seal with Freon, pressurize it a t= iny bit just to have excess Freon in the line, seal it (reconnect it to = the pump line), then use a =93sniffer=94 to detect the very smal= lest micro leak. OK, so there are not two ends of the seal =96 that is you c= an only flow gas into the seal but not through the seal. Now, you=92ll have t= o use some ingenuity in getting the Freon into all of the seal. Vacuum? >> =20 >> Flow plenty of air over all areas for a while to remove residual Freon po= ckets after putting Freon in the seal and before your search begins. Now if y= ou find a leak using a sniffer, you might have an air leak there too. Just m= ake sure there=92s positive pressure (tiny amount) in the seal when searchin= g for that micro amount of Freon. If you close the door and then pressure up= the seal with Freon, use the sniffer around everything to find the leak. >> =20 >> CAUTION: Freon is not a life supporting gas. Don=92t make the mistake of f= illing the pressurized cockpit with a gas that doesn=92t support life. Test t= he sniffer with a small amount of Freon first to make sure it makes plenty o= f noise in the presence of Freon. Then if the sniffer is mak= ing noise all the time, get out and start again by purging everything with = air. The sniffer I used is sensitive enough that purging take= s a while to get rid of all residual Freon. I didn=92t have a pressurized co= ckpit to deal with so this may not be an ideal method. But it works for find= ing leaks in tanks. >> =20 >> No virus found in this message. >> Checked by AVG - www.avg.com >> Version: 2013.0.3392 / Virus Database: 3209/6535 - Release Date: 07/30/13= >>=20 >=20 --Apple-Mail-DF1A2E70-99F5-4451-9E0B-3E1D0E0DEC49 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable
Here is how we find pinhole leaks in f= uel cells simply put a drop of ammonia in the inflation line. Soak a soft wh= ite rag in litmus solution. Or make your own using red cabbage and lime. If i= nterested I can explain how. Inflate. And hold the rag over the seal. Turns p= urple over the tiniest of pinholes. No freon or sniffer to buy. Almost free.=  

Typing and grammar errors courtesy of Siri and the iPhone.

On Jul 30, 2013, at 15:33, Ted Noel <tednoel@cfl.rr.com> wrote:

=20 =20 =20 Brilliant!

Same concept, easier application. To fill the seal, inflate with Freon and deflate. Repeat twice. You'll be at about 90% Freon in the seal when the next cycle is done. If you want to get rid of the ambient Freon, a fan will work well.

Ted Noel


On 7/30/2013 11:59 AM, Jim Nordin wrote:

I don=E2=80=99t know why the method of finding leaks in fuel tanks should not work for the seal. But read this and it might give you an idea of how to find the leak without smoke, water =E2=80=93 anything other than a non-volatile gas.

 

Realize this hasn=E2=80=99t been tested on a seal so it may be only a =E2=80=9Cgood though= t=E2=80=9D of getting it done.

Use of a Freon sniffer.

Purge the seal. Flush the inside of the seal with Freon, pressurize it a tiny bit just to have excess Freon in the line, seal it (reconnect it to the pump line), then use a =E2=80=9Csniffer=E2=80=9D to detect the very smallest m= icro leak. OK, so there are not two ends of the seal =E2=80=93 that is you can= only flow gas into the seal but not through the seal. Now, you=E2=80=99ll have t= o use some ingenuity in getting the Freon into all of the seal. Vacuum?

 

Flow plenty of air over all areas for a while to remove residual Freon pockets after putting Freon in the seal and before your search begins. Now if you find a leak using a sniffer, you might have an air leak there too. Just make sure there=E2=80=99s positive pressure (tiny amount) in the seal w= hen searching for that micro amount of Freon. If you close the door and then pressure up the seal with Freon, use the sniffer around everything to find the leak.

 

CAUTION: Freon is not a life supporting gas. Don=E2=80=99t make the mistake of filling the pressurized cockpit with a gas that doesn=E2=80=99t support life. Test the sniffer with a small amount of Freon first to make sure it makes plenty of noise in the presence of Freon. Then if the sniffer is making noise all the time, get out and start again by purging everything with air. The sniffer I used is sensitive enough that purging takes a while to get rid of all residual Freon. I didn=E2=80=99t have a pressuriz= ed cockpit to deal with so this may not be an ideal method. But it works for finding leaks in tanks.

 

No virus= found in this message.
Checked by AVG - www.avg.com
Version: 2013.0.3392 / Virus Database: 3209/6535 - Release Date: 07/30/13


=20
= --Apple-Mail-DF1A2E70-99F5-4451-9E0B-3E1D0E0DEC49--