REFLECTOR:Low fuel light

[KeithHallsten]

John,
Pat Shea's tests proved that the sump tank will pass trapped air to the
strake tanks, even when the plane is sitting on the ground.  As soon as a
tiny difference in head between the two strake tanks exists, the air will
run up to one of the strake tanks through the fuel line.  In flight these
imbalances exist with each tiny rock of the wings.  What happens is that you
get a little slug of air going to one strake at the same time that you get a
slug of fuel passing into the sump tank from the other strake.
You are losing me with your mention of tank overflow lines.  I don't see any
such thing in the Velocity manual.  Where exactly are these lines and how
are they connected?  We may just have a difference in terminology.
Keith


----- Original Message ----- 
From: "John Dibble" <aminetech@dixie-net.com>
To: <reflector@tvbf.org>
Sent: Saturday, July 26, 2003 8:01 PM
Subject: Re: REFLECTOR:Low fuel light


> Keith
>
> How does an unvented sump not trap air?
> How about shutting off the manifold vents to the tanks?  The tank overflow
lines will
> provide tank venting, when needed, and maintain the tank pressure above
the sump vent
> pressure during flight.  A float type check valve in the sump vent line
will allow any
> air to escape while preventing fuel being forced out the vent.
>
> John
>
> KeithHallsten wrote:
>
> >  Pat Shea has proven
> > experimentally that the sump tank will not trap air if the sump vent is
> > closed off.
> >
>
>
>
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