REFLECTOR:Low fuel light
alventures
reflector@tvbf.org
Fri, 25 Jul 2003 14:56:46 -0700
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Al,
This thread started with Rene's problem with occasional low-fuel warning
with plenty of fuel on board. How is the air getting into the sump tank
if the strake tanks have enough fuel to keep the strake-to-sump fuel
lines submerged? The sump vent seems the most likely route.
Keith
Yes, I agree with that; assuming of, course, that the intermittent
warning is due to a low level in the sump tank and not a problem with
the float switch, or something else.
After giving the issue more thought, the valve in the sump vent seems to
make sense. Although it is one more thing on the checklist, and not
convenient to get at. And it doesn't preclude fuel exhaustion in the
case of a leaky fuel cap. If we are going to keep a simple gravity feed
system from both tanks, we have to pay attention to the fuel caps, and
be aware of one tank level dropping faster than the other.
Let's see; if we could just find a different place to put the fuel cap;
someplace that doesn't happen to see about the maximum negative pressure
of anywhere on the airplane.
Al
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<title>Re: REFLECTOR:Low fuel light</title>
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<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>Al,</span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'> </span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>This thread started with =
Rene's
problem with occasional low-fuel warning with plenty of fuel on =
board.
How is the air getting into the sump tank if the strake tanks have =
enough fuel
to keep the strake-to-sump fuel lines submerged? The sump vent =
seems the
most likely route.</span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'> </span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D2 =
face=3DArial><span
style=3D'font-size:10.0pt;font-family:Arial'>Keith</span></font></p>
</div>
<div>
<p class=3DMsoNormal style=3D'margin-left:.5in'><font size=3D3 =
face=3D"Times New Roman"><span
style=3D'font-size:12.0pt'> </span></font></p>
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<blockquote style=3D'border:none;border-left:solid black =
1.5pt;padding:0in 0in 0in 3.0pt;
margin-left:3.0pt;margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>=
<div>
<p class=3DMsoNormal style=3D'margin-left:.6in'><font size=3D3 =
color=3Dblue
face=3D"Times New Roman"><span =
style=3D'font-size:12.0pt;color:blue'>Yes, I agree
with that; assuming of, course, that the intermittent warning is due to =
a low
level in the sump tank and not a problem with the float switch, or =
something
else.</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.6in'><font size=3D3 =
color=3Dblue
face=3D"Times New Roman"><span =
style=3D'font-size:12.0pt;color:blue'> </span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.6in'><font size=3D3 =
color=3Dblue
face=3D"Times New Roman"><span =
style=3D'font-size:12.0pt;color:blue'>After giving
the issue more thought, the valve in the sump vent seems to make =
sense. Although
it is one more thing on the checklist, and not convenient to get at. =
And
it doesn’t preclude fuel exhaustion in the case of a leaky fuel =
cap.
If we are going to keep a simple gravity feed system from both tanks, we =
have
to pay attention to the fuel caps, and be aware of one tank level =
dropping
faster than the other.</span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.6in'><font size=3D3 =
color=3Dblue
face=3D"Times New Roman"><span =
style=3D'font-size:12.0pt;color:blue'> </span></font></p>
<p class=3DMsoNormal style=3D'margin-left:.6in'><font size=3D3 =
color=3Dblue
face=3D"Times New Roman"><span =
style=3D'font-size:12.0pt;color:blue'>Let’s
see; if we could just find a different place to put the fuel cap; =
someplace
that doesn’t happen to see about the maximum negative pressure of =
anywhere
on the airplane.</span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dblue face=3DVerdana><span =
style=3D'font-size:
11.0pt;font-family:Verdana;color:blue'> </span></font></p>
<p class=3DMsoNormal><font size=3D2 color=3Dblue face=3DVerdana><span =
style=3D'font-size:
11.0pt;font-family:Verdana;color:blue'>Al</span></font></p>
</div>
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