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From: Bill Hannahan <wfhannahan@yahoo.com>
Subject: Testing for fuel leaks and fuel probes to use
X-Original-To: MAIL LANCAIR <lml@lancaironline.net>
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  I use sight gauges for all three tanks.
   
  The top of the gauge is connected to a T at the wing tank tip vent with a tube, called the reference leg, to provide proper pressure to balance the fuel column.
   
  During testing I accidentally ran a tank dry due to condensation in the reference leg causing a pressure differential that resulted in a high reading. I solved that by collecting pitot air pressure with a tube on the belly and metering it with an orifice through the reference legs keeping them clear of condensation. It has been trouble free since then, 2000 hr.
   
  I always keep plenty of fuel in the header.
   
  If there is serious interest I will take some photos and draw a sketch.


 
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<BR>  <div class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman">I use sight gauges for all three tanks.</FONT></div>  <div class=MsoNormal style="MARGIN: 0in 0in 0pt"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p><FONT face="Times New Roman">&nbsp;</FONT></o:p></div>  <div class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman">The top of the gauge is connected to a T at the wing tank tip vent with a tube, called the reference leg, to provide proper pressure to balance the fuel column.</FONT></div>  <div class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p><FONT face="Times New Roman">&nbsp;</FONT></o:p></div>  <div class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman">During testing I accidentally ran a tank dry due to condensation in the reference leg causing a pressure differential that resulted in a high reading. I solved that by collecting pitot air pressure with a tube on the belly
 and metering it with an orifice through the reference legs keeping them clear of condensation. It has been trouble free since then, 2000 hr.</FONT></div>  <div class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman"></FONT>&nbsp;</div>  <div class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman">I always keep plenty of fuel in the header.</FONT></div>  <div class=MsoNormal style="MARGIN: 0in 0in 0pt"><o:p><FONT face="Times New Roman">&nbsp;</FONT></o:p></div>  <div class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman">If there is serious interest I will take some photos and draw a sketch.</FONT></div><BR><p>&#32;

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