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From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: [LML] Re: Current fault detector
To: lml
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Date: Sun, 07 Jan 2007 21:56:23 -0500
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Posted for "Hamid A. Wasti" <hwasti@starband.net>:

  "Wally Bestgen" <whiskeyb@sbcglobal.net> wrote:
>
> First a little background. I am currently building a LIVPT.  The 
> airplane has
> the factory Lancair fuel system.  During the building of the fuel 
> system, I
> became aware of the fact that there is no way to determine if the 
> belly tank
> fuel vent solenoid has failed.  Considering all the discussion about 
> the fuel
> system I approached a EE designer/fabricator with the problem.  He has 
> come up
> with a solution that I am using in my airplane.

  What you really want to know is that the belly tank vent opens when you flip
the switch.  So you are measuring the current to the solenoid to make sure
that it is drawing at least a minimum level of current when you expect it to.
  Does the fact that the solenoid coil is drawing current necessarily mean 
that
vent is actually open?  Am I missing some critical piece of information, or
are you still not able to tell if the vent is actually open?
  
  Regards,
  
  Hamid