X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Sat, 31 Jan 2009 07:39:24 -0500 Message-ID: X-Original-Return-Path: Received: from web54305.mail.re2.yahoo.com ([206.190.49.115] verified) by logan.com (CommuniGate Pro SMTP 5.2.12) with SMTP id 3461221 for lml@lancaironline.net; Fri, 30 Jan 2009 17:22:06 -0500 Received: (qmail 36964 invoked by uid 60001); 30 Jan 2009 22:22:06 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:References:Date:From:Subject:To:MIME-Version:Content-Type:Message-ID; b=3UU1xjTEH9kf8JUQ01rLMmyhUiTUofBaE3K+ud/IbdvGosUFuROvMM9claW+6+bPj9UkFel1+9xtiDP+hJZKYiwCRBgYvss550avFuvNlgpowX2bkyE/q2qyYSnRrw86ZZ6qRE3AcmXWXzbQtuKUvCU5W+WHRLKnlnwE4svvGec=; X-YMail-OSG: 9HOr2FQVM1n98o89suWi.cLo1FS_Jk_OpXKzn_Gg4y6UMAFCyZt3I4K_zMoekQzHGtdDrY2UC_9PWb961uZEdBL99UQDYl2dAz2DguXcuPggMuFDBXH2Cit.sXS1z8MozEDgrr8pMGck70D5hJct2ON5BrfeKAT_1clIloZ4Y0HUaS95sMCwgQ6ENZuBVZ66.kxahl6pP8DOg1EAFkznRF.lBTQbFqnrGnjYvbc- Received: from [12.155.58.181] by web54305.mail.re2.yahoo.com via HTTP; Fri, 30 Jan 2009 14:22:06 PST X-Mailer: YahooMailRC/1155.45 YahooMailWebService/0.7.260.1 References: X-Original-Date: Fri, 30 Jan 2009 14:22:06 -0800 (PST) From: Matt losangeles Subject: Re: [LML] Re: Fuel Tank Testing X-Original-To: Lancair Mailing List MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-727331408-1233354126=:35541" X-Original-Message-ID: <431296.35541.qm@web54305.mail.re2.yahoo.com> --0-727331408-1233354126=:35541 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable I have found a nice way to put a vacuum on a tank and seal up a leak. Get o= ne of these:=0A=0Ahttp://www.vaccon.com/J-Series-M-home.aspx=0A=0AThis crea= tes a nice NO SPARK vacuum so you don't have to worry about fumes blowing u= p your vacuum cleaner and/or your airplane.=A0Your air compressor will supp= ly the air to make this thing work. I hooked up one of these along with a 0= -30 inches of water gauge and a cheap hardware store valve. If you pull abo= ut 10-20 inches of vacuum (measured with water not mercury on the gauge) yo= u can put some resin on a leak and this will suck the resin and seal it up.= After the resin, cover with flox and unhook the vacuum. Make sure to prep = the area by scuffing it up and=A0cleaning it with acetone. I put acetone on= the crack while pulling a vacuum to try and clean up inside the crack.=A0B= e very careful not to pull too much vacuum or you can collapse the tank. Al= so, on my old Mooney I used that aeroseal stuff, which is basically lock ti= ght. With that you want about 5 inches of vacuum because it is thin like wa= ter and too much vacuum will suck it all the way into the tank without giving it a chance to seal. (water measure).=0A=0AI have fixed lea= ks I had when I got my 360 with this method. Both wings and the header had = leaks and now the don't. It works great.=0A=0AI think the vaccon and gauges= with hose and everything should be less than $80 bucks. A nice tool to hav= e lying around.=0A=0AMatt=0A=0A=0A=0A=0A________________________________=0A= From: Christian Meier =0ATo: lml@lancaironline.net=0ASent= : Thursday, January 29, 2009 8:23:54 PM=0ASubject: [LML] Re: Fuel Tank Test= ing=0A=0A=0ABryan,=0AIn Austria we use following test to check the fueltank= s:=0AFill the wings completly with water.=A0Seal all openings. Add a tube t= o the fuel pickup.=0AThis tube should be 1.43 meters high and will also be = filled with water. Keep this for a few hours=0Aand check the water level.= =0A1,43m of water =3D 0,14bar =3D 4,14inHG=A0 Pressure=0AThere is no barome= tric error. =0A=A0=0AChristian=0A=A0=0ALnc2 / 390=0AOE-VCM=0Awww.lancair.at= =0A=0A=0A --0-727331408-1233354126=:35541 Content-Type: text/html; charset=us-ascii
I have found a nice way to put a vacuum on a tank and seal up a leak. Get one of these:
 
 
This creates a nice NO SPARK vacuum so you don't have to worry about fumes blowing up your vacuum cleaner and/or your airplane. Your air compressor will supply the air to make this thing work. I hooked up one of these along with a 0-30 inches of water gauge and a cheap hardware store valve. If you pull about 10-20 inches of vacuum (measured with water not mercury on the gauge) you can put some resin on a leak and this will suck the resin and seal it up. After the resin, cover with flox and unhook the vacuum. Make sure to prep the area by scuffing it up and cleaning it with acetone. I put acetone on the crack while pulling a vacuum to try and clean up inside the crack. Be very careful not to pull too much vacuum or you can collapse the tank. Also, on my old Mooney I used that aeroseal stuff, which is basically lock tight. With that you want about 5 inches of vacuum because it is thin like water and too much vacuum will suck it all the way into the tank without giving it a chance to seal. (water measure).
 
I have fixed leaks I had when I got my 360 with this method. Both wings and the header had leaks and now the don't. It works great.
 
I think the vaccon and gauges with hose and everything should be less than $80 bucks. A nice tool to have lying around.
 
Matt

From: Christian Meier <lancair@meier.cc>
To: lml@lancaironline.net
Sent: Thursday, January 29, 2009 8:23:54 PM
Subject: [LML] Re: Fuel Tank Testing

Bryan,
In Austria we use following test to check the fueltanks:
Fill the wings completly with water. Seal all openings. Add a tube to the fuel pickup.
This tube should be 1.43 meters high and will also be filled with water. Keep this for a few hours
and check the water level.
1,43m of water = 0,14bar = 4,14inHG  Pressure
There is no barometric error.
 
Christian
 
Lnc2 / 390
OE-VCM

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