REFLECTOR:Re: Sump vent

[Pat Shea]

Keith,

I actually did this experiment already on my XL the
last time we had an uneven fuel flow brainstorm on the
reflector...

I didn't prove anything about how the system will work
(or not) without a sump vent, just that if air is
introduced into the sump that it will not get trapped
there without a sump vent.

Hope the exhaust works well for you - how are your
clearances (cowl, b-nut, intakes, etc...)??

Pat
 
--- KeithHallsten <KeithHallsten@quiknet.com> wrote:
> Pat,
> 
> I strongly suspect you are right, but I haven't
> proven this experimentally.
> That's why I'd be willing to forego the sump vent. 
> With 3/8" vents to the
> strakes and 3/8" fuel lines from the strakes to the
> sump, I think the need
> for a vent from the sump tank is unlikely.
> 
> By the way, my "Y" exhaust stacks from Custom
> Aircraft Parts arrived and
> look good.  Thanks for the recommendation!
> 
> Keith
> 
> 
> ----- Original Message ----- 
> From: "Pat Shea" <xl340hp@yahoo.com>
> To: <reflector@tvbf.org>
> Sent: Thursday, July 24, 2003 12:03 PM
> Subject: Re: REFLECTOR:Low fuel light
> 
> 
> > FWIW - If you were to block off the fuel lines
> going  from the strakes to
> the sump, drain your sump completely, close the sump
> vent, and then release
> the fuel lines, the sump would refill almost
> completely.  The air in the
> sump simply vents via the fuel inlet lines from
> whichever strake is at a
> lower pressure.  The pocket of air at the top of a
> sumps in plane's without
> sump vents is just air trapped above the fuel inlet
> lines.
> 
> 
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