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The LNC2 manual suggests that we expose (make it visible) sections of the
fuel lines running between the wing tanks and the header tank.  I'm not wild
about the "tie wrap it to the instrument panel" approach listed in the manual
and I'm not sure how much you can see though the Tygon 4040 line.  (This was
probably a better idea in the early days when they used clear tubing.)  I
have an idea for clear sight gauges but it is more work to install and adds
two more connections (leak points) per line -- frankly, I'm wondering how
much value there is in it anyway.

Knowing how much fuel is in the header tank is critical, I'll admit that.  
I'll have a capacitance fuel probe in the header tank and each wing tank for
that.  If it fails I'll have to land before the header tank runs dry.  I'll
have an automatic system for turning the transfer pumps on when the header
tank gets "low" (seven gallons?) and shuts it off when it gets full, or
nearly so.  The question is whether it's useful to see the translucent fuel
line between the transfer pump and the header tank.

This is not asking about the usefulness of the "sight gauge" for header tank
quantity as described in the manual.  That one seems pretty foolproof (though
I'm using a capacitance probe instead).

A related question.  Does anything bad happen if a Facet fuel transfer pump
sucks air for 5 minutes before I notice a wing tank is empty and shut off the
pump?

- Rob Wolf
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