Vince Frazier
Joined: 10 Jan 2006
Posts: 132
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 Posted: Mon Feb 20, 2006 9:27 am Post subject: vapor lock |
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From: Ernest Hale <ehale(at)cheyenne-enviro.com>
Subject: Re: Flight Test Progress
--> <ehale(at)cheyenne-enviro.com>
I have a terrible time with fuel pressure due to vapor lock as well, any
advice will be greatly appreciated, I have done just about everything I
can think of.
Ernest and others,
No 90 degree bends in the fuel lines, right? I'm sure you've already
done that.
An easy way to see if a heat shield would help keep the lines cooler is
to wrap the fuel lines in the engine compartment with ordinary aluminum
foil wherever they are near a heat source. If the foil, which is 97%
reflective, helps keep the heat away then you can add a permanent heat
shield or just make certain that the foil is in good shape.
I've got one spot where the fuel line passes very close to the exhaust
just behind the fuel controller and it's easy to keep that line wrapped
in foil in addition to the heat shield on the exhaust.
I have had a few of my exhaust pipe mounted heat shields fail and go out
the air outlet. Ugh. Found 'em on the runway when I came back to the
airport. But the foil stayed in place as a backup! Those problems are
behind me now, but I still have the foil over the firesleeve in a couple
tight spots.
YMMV.
Vince
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_________________
Vince Frazier
3965 Caborn Road
Mount Vernon, IN 47620
812-464-1839 work
812-985-7309 home
F-1H Rocket, N540VF
http://vincesrocket.com/ |
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