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In a message dated 12/3/0 9:49:18 PM, David Jones wrote:

<<The use of 5/16 glass tubing in the cockpit to carry gasoline would not be
safe.  Please abandon this idea.  Take it from one who knows.>>

David -

I admit that I am not a chemist.  However, I worked in a chem lab for a
couple of years with several chemists, and was very impressed by their
knowledge, so rest assured that I do listen to chemists.

I'd like to know the basis for your objection to pyrex tubing for a sight
gauge.  Is it a chemical compatibility issue or the fact that, basically
being glass, it is possible to fracture?  We're talking about a short stubby
section here, though I'll admit, a glass line doesn't seem like the best idea
I've ever had...

Concerning tygon, there are fuel-compatible tygons and fuel-incompatible
tygons.  Hey, I'm an engineer, not a chemist.  If the label says "designed
for petroleum-based products such as gasoline", as does Tygon F-4040, then
why not use it?

There's no doubt that running fuel lines through the cockpit is dangerous.  A
little hard to avoid, though.  So having the safest fuel lines possible is
the goal.  

- Rob Wolf
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