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Full-name: Sky2high
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Date: Sat, 23 Mar 2013 18:49:52 -0400 (EDT)
Subject: Re: [LML] Re: 360 fuel transfer
To: lml@lancaironline.net
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Terrence,
 
I suggest you have individual switches for each pump that operate totally  
independent of the float circuits.
 
Grayhawk
 
 
In a message dated 3/23/2013 5:02:19 P.M. Central Daylight Time,  
troneill@charter.net writes:

Angier,
Thanks for that experience, which made me realize I need  a switch to 
bypass my header float switch, to be able to transfer fuel  manually in case the 
float switch fails in the Off position.
This LML list  is a good thing.
Terrence

Sent from my iPad

On Mar 22, 2013,  at 9:15 PM, "Greenbacks, UnLtd." <N4ZQ@VERIZON.NET> wrote:

>  About 20min into todays' flight and with the transfer pump switches set 
to  auto, the system failed. Actually it had failed before takeoff but I was 
 unaware since the header tank was full on takeoff. I observed the sight 
gauge  level drop to its normal pump on level and kept falling. The EI fuel 
gauge for  the header tank agreed and kept falling. Normally the pumps come on 
 automatically at about 7.5gal but not today so I continued the flight and  
operated the transfer pumps manually for the 2.5hr flight. About 5 min out  
from landing I again turned on the transfer pumps manually and this time  
forgot to shut them off. :-(
> Needless to say fuel was being pumped  overboard as I taxied into the 
hangar....
> 
> So what went wrong?  The auto transfer system is controlled by a solid 
state relay from Perhelion  Design and it works great.
> However, the system failed due to the fact  that one of the leads to the 
relay from the buss had somehow slipped off its  terminal on the relay(these 
terminals are pointed down in this installation).  A female spade connector 
that was obviously just loose enough to wiggle itself  off, did so. In the 
end, a simple fix but it reinforces the point that none of  our building 
work should be taken for granted. Now the two power leads to the  relay are 
secured with clear heat shrink as well as lacing tape.
>  
> Angier Ames
> N4ZQ
> --
> For archives and unsub  
http://mail.lancaironline.net:81/lists/lml/List.html

--
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<HTML><HEAD>
<META content=3D"text/html; charset=3DUS-ASCII" http-equiv=3DContent-Type>
<META name=3DGENERATOR content=3D"MSHTML 9.00.8112.16470"></HEAD>
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color=3D#000000 size=3D2 face=3DArial>
<DIV>Terrence,</DIV>
<DIV>&nbsp;</DIV>
<DIV>I suggest you have individual switches for each pump that operate tota=
lly=20
independent&nbsp;of the float circuits.</DIV>
<DIV>&nbsp;</DIV>
<DIV>Grayhawk</DIV>
<DIV>&nbsp;</DIV>
<DIV>
<DIV>In a message dated 3/23/2013 5:02:19 P.M. Central Daylight Time,=20
troneill@charter.net writes:</DIV>
<BLOCKQUOTE=20
style=3D"BORDER-LEFT: blue 2px solid; PADDING-LEFT: 5px; MARGIN-LEFT: 5px">=
<FONT=20
  style=3D"BACKGROUND-COLOR: transparent" color=3D#000000 size=3D2=20
  face=3DArial>Angier,<BR>Thanks for that experience, which made me realize=
 I need=20
  a switch to bypass my header float switch, to be able to transfer fuel=20
  manually in case the float switch fails in the Off position.<BR>This LML =
list=20
  is a good thing.<BR>Terrence<BR><BR>Sent from my iPad<BR><BR>On Mar 22, 2=
013,=20
  at 9:15 PM, "Greenbacks, UnLtd." &lt;N4ZQ@VERIZON.NET&gt; wrote:<BR><BR>&=
gt;=20
  About 20min into todays' flight and with the transfer pump switches set t=
o=20
  auto, the system failed. Actually it had failed before takeoff but I was=
=20
  unaware since the header tank was full on takeoff. I observed the sight g=
auge=20
  level drop to its normal pump on level and kept falling. The EI fuel gaug=
e for=20
  the header tank agreed and kept falling. Normally the pumps come on=20
  automatically at about 7.5gal but not today so I continued the flight and=
=20
  operated the transfer pumps manually for the 2.5hr flight. About 5 min ou=
t=20
  from landing I again turned on the transfer pumps manually and this time=
=20
  forgot to shut them off. :-(<BR>&gt; Needless to say fuel was being pumpe=
d=20
  overboard as I taxied into the hangar....<BR>&gt; <BR>&gt; So what went w=
rong?=20
  The auto transfer system is controlled by a solid state relay from Perhel=
ion=20
  Design and it works great.<BR>&gt; However, the system failed due to the =
fact=20
  that one of the leads to the relay from the buss had somehow slipped off =
its=20
  terminal on the relay(these terminals are pointed down in this installati=
on).=20
  A female spade connector that was obviously just loose enough to wiggle i=
tself=20
  off, did so. In the end, a simple fix but it reinforces the point that no=
ne of=20
  our building work should be taken for granted. Now the two power leads to=
 the=20
  relay are secured with clear heat shrink as well as lacing tape.<BR>&gt;=
=20
  <BR>&gt; Angier Ames<BR>&gt; N4ZQ<BR>&gt; --<BR>&gt; For archives and uns=
ub=20
  http://mail.lancaironline.net:81/lists/lml/List.html<BR><BR>--<BR>For arc=
hives=20
  and unsub=20
http://mail.lancaironline.net:81/lists/lml/List.html</FONT></BLOCKQUOTE></D=
IV></FONT></BODY></HTML>
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