REFLECTOR:Low fuel light

Rick reflector@tvbf.org
Sat, 26 Jul 2003 10:15:25 -0000


This is a multi-part message in MIME format.

------=_NextPart_000_0012_01C3535E.D4DA1880
Content-Type: text/plain;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

Re: REFLECTOR:Low fuel lightIn this same discussion a year or two ago, =
it was determined in one case, that the fuel flow itself towards the =
float was forcing it down, causing the low fuel indication.
Rick
  ----- Original Message -----=20
  From: Brett Ferrell=20
  To: reflector@tvbf.org=20
  Sent: Saturday, July 26, 2003 1:05 PM
  Subject: Re: REFLECTOR:Low fuel light


  Why would you jump to the assumption it's air in the tank?  Without a =
sightglass, or replacing that run of tubing to the sump neoprene or =
something, we don't have any idea what's causing the indication.  Could =
just as easily be a defect inside the instrument.  My whole contention =
was that, if air is entering the sump, it's probably for the best b/c =
the alternative is most likely to pull a vacuum on the tank.  Air =
doesn't displace fuel without a reason.

   Brett

    ----- Original Message -----=20
    From: alventures=20
    To: reflector@tvbf.org=20
    Sent: Friday, July 25, 2003 5:56 PM
    Subject: RE: REFLECTOR:Low fuel light


    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


------=_NextPart_000_0012_01C3535E.D4DA1880
Content-Type: text/html;
	charset="iso-8859-1"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD><TITLE>Re: REFLECTOR:Low fuel light</TITLE>
<META http-equiv=3DContent-Type content=3D"text/html; =
charset=3Diso-8859-1">
<META content=3D"MSHTML 6.00.2600.0" name=3DGENERATOR>
<STYLE>@font-face {
	font-family: Verdana;
}
@page Section1 {size: 8.5in 11.0in; margin: 1.0in 1.25in 1.0in 1.25in; }
P.MsoNormal {
	FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman"
}
LI.MsoNormal {
	FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman"
}
DIV.MsoNormal {
	FONT-SIZE: 12pt; MARGIN: 0in 0in 0pt; FONT-FAMILY: "Times New Roman"
}
A:link {
	COLOR: blue; TEXT-DECORATION: underline
}
SPAN.MsoHyperlink {
	COLOR: blue; TEXT-DECORATION: underline
}
A:visited {
	COLOR: purple; TEXT-DECORATION: underline
}
SPAN.MsoHyperlinkFollowed {
	COLOR: purple; TEXT-DECORATION: underline
}
SPAN.emailstyle17 {
	COLOR: navy; FONT-FAMILY: Arial
}
SPAN.emailstyle18 {
	FONT-WEIGHT: normal; COLOR: blue; FONT-STYLE: normal; FONT-FAMILY: =
Verdana; TEXT-DECORATION: none
}
SPAN.EmailStyle19 {
	FONT-WEIGHT: normal; COLOR: blue; FONT-STYLE: normal; FONT-FAMILY: =
Verdana; TEXT-DECORATION: none
}
DIV.Section1 {
	page: Section1
}
</STYLE>
</HEAD>
<BODY lang=3DEN-US vLink=3Dpurple link=3Dblue bgColor=3Dwhite>
<DIV><FONT face=3DArial size=3D2>In this same discussion a year or two =
ago, it was=20
determined in one case, that the fuel flow itself towards the float was =
forcing=20
it down, causing the low fuel indication.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Rick</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
  <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
  <DIV=20
  style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
  <A title=3Dbferrell@123mail.net =
href=3D"mailto:bferrell@123mail.net">Brett=20
  Ferrell</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dreflector@tvbf.org=20
  href=3D"mailto:reflector@tvbf.org">reflector@tvbf.org</A> </DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Saturday, July 26, 2003 =
1:05=20
  PM</DIV>
  <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: REFLECTOR:Low fuel =

  light</DIV>
  <DIV><BR></DIV>
  <DIV><FONT face=3DArial size=3D2>Why would you jump to the assumption =
it's air in=20
  the tank?&nbsp; Without a&nbsp;sightglass, or replacing that run of =
tubing to=20
  the sump neoprene or something, we don't have any idea what's causing =
the=20
  indication.&nbsp; Could just as easily be a defect inside the=20
  instrument.&nbsp; My whole contention was that, if air is entering the =
sump,=20
  it's probably for the best b/c the alternative is most likely to pull =
a vacuum=20
  on the tank.&nbsp; Air doesn't displace fuel without a=20
  reason.</FONT></DIV><FONT face=3DArial size=3D2>
  <DIV><BR>&nbsp;Brett</DIV>
  <DIV></FONT>&nbsp;</DIV>
  <BLOCKQUOTE dir=3Dltr=20
  style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
    <DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
    <DIV=20
    style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
    <A title=3Dalventures@msn.com =
href=3D"mailto:alventures@msn.com">alventures</A>=20
    </DIV>
    <DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dreflector@tvbf.org=20
    href=3D"mailto:reflector@tvbf.org">reflector@tvbf.org</A> </DIV>
    <DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Friday, July 25, 2003 =
5:56=20
    PM</DIV>
    <DIV style=3D"FONT: 10pt arial"><B>Subject:</B> RE: REFLECTOR:Low =
fuel=20
    light</DIV>
    <DIV><BR></DIV>
    <DIV class=3DSection1>
    <DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT face=3DArial =
size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Al,</SPAN></FONT></P></DIV>
    <DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT =
face=3D"Times New Roman"=20
    size=3D3><SPAN style=3D"FONT-SIZE: =
12pt"></SPAN></FONT>&nbsp;</P></DIV>
    <DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT face=3DArial =
size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial">This thread started =
with Rene's=20
    problem with occasional low-fuel warning with plenty of fuel on =
board.&nbsp;=20
    How is the air getting into the sump tank if the strake tanks have =
enough=20
    fuel to keep the strake-to-sump fuel lines submerged?&nbsp; The sump =
vent=20
    seems the most likely route.</SPAN></FONT></P></DIV>
    <DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT =
face=3D"Times New Roman"=20
    size=3D3><SPAN style=3D"FONT-SIZE: =
12pt"></SPAN></FONT>&nbsp;</P></DIV>
    <DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT face=3DArial =
size=3D2><SPAN=20
    style=3D"FONT-SIZE: 10pt; FONT-FAMILY: =
Arial">Keith</SPAN></FONT></P></DIV>
    <DIV>
    <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.5in"><FONT =
face=3D"Times New Roman"=20
    size=3D3><SPAN style=3D"FONT-SIZE: =
12pt"></SPAN></FONT>&nbsp;</P></DIV>
    <BLOCKQUOTE=20
    style=3D"BORDER-RIGHT: medium none; PADDING-RIGHT: 0in; BORDER-TOP: =
medium none; PADDING-LEFT: 3pt; PADDING-BOTTOM: 0in; MARGIN: 5pt 0in 5pt =
3pt; BORDER-LEFT: black 1.5pt solid; PADDING-TOP: 0in; BORDER-BOTTOM: =
medium none">
      <DIV>
      <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.6in"><FONT =
face=3D"Times New Roman"=20
      color=3Dblue size=3D3><SPAN style=3D"FONT-SIZE: 12pt; COLOR: =
blue">Yes, I agree=20
      with that; assuming of, course, that the intermittent warning is =
due to a=20
      low level in the sump tank and not a problem with the float =
switch, or=20
      something else.</SPAN></FONT></P>
      <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.6in"><FONT =
face=3D"Times New Roman"=20
      color=3Dblue size=3D3><SPAN=20
      style=3D"FONT-SIZE: 12pt; COLOR: blue"></SPAN></FONT>&nbsp;</P>
      <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.6in"><FONT =
face=3D"Times New Roman"=20
      color=3Dblue size=3D3><SPAN style=3D"FONT-SIZE: 12pt; COLOR: =
blue">After giving=20
      the issue more thought, the valve in the sump vent seems to make=20
      sense.&nbsp; Although it is one more thing on the checklist, and =
not=20
      convenient to get at. &nbsp;And it doesn=92t preclude fuel =
exhaustion in the=20
      case of a leaky fuel cap.&nbsp; If we are going to keep a simple =
gravity=20
      feed system from both tanks, we have to pay attention to the fuel =
caps,=20
      and be aware of one tank level dropping faster than the=20
      other.</SPAN></FONT></P>
      <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.6in"><FONT =
face=3D"Times New Roman"=20
      color=3Dblue size=3D3><SPAN=20
      style=3D"FONT-SIZE: 12pt; COLOR: blue"></SPAN></FONT>&nbsp;</P>
      <P class=3DMsoNormal style=3D"MARGIN-LEFT: 0.6in"><FONT =
face=3D"Times New Roman"=20
      color=3Dblue size=3D3><SPAN style=3D"FONT-SIZE: 12pt; COLOR: =
blue">Let=92s see; if=20
      we could just find a different place to put the fuel cap; =
someplace that=20
      doesn=92t happen to see about the maximum negative pressure of =
anywhere on=20
      the airplane.</SPAN></FONT></P>
      <P class=3DMsoNormal><FONT face=3DVerdana color=3Dblue =
size=3D2><SPAN=20
      style=3D"FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: =
Verdana"></SPAN></FONT>&nbsp;</P>
      <P class=3DMsoNormal><FONT face=3DVerdana color=3Dblue =
size=3D2><SPAN=20
      style=3D"FONT-SIZE: 11pt; COLOR: blue; FONT-FAMILY: =
Verdana">Al</SPAN></FONT></P></DIV></BLOCKQUOTE></DIV></BLOCKQUOTE></BLOC=
KQUOTE></BODY></HTML>

------=_NextPart_000_0012_01C3535E.D4DA1880--