Marvin Kaye wrote:

At 11:55 PM 6/2/99 -0700,Bill Freeman wrote:

The Facet "Block" type pump is claimed to be essentially "blockage
proof", altho this may be an exaggeration.  So far, many many
thousands of hours have been flown with Long EZs with the
Facet block pump downstream of the engine driven mech pump,
and I have heard of no electric pump failures which caused a
fuel blockage.  The multiple pump systems with several check valves and
bypasses seems more likely to fail than a pair of Facet block pumps
in series with a good filter between to stop chunks from a failing
upstream pump from killing the downstream pump.

The Facet pumps you are describing are the same ones that are supplied with
the Lancair kits as transfer pumps and are flying around successfully in
hundreds of L320's with header tanks.  They are flow-through pumps and are
also used as lo-pres boost pumps on some Lancairs without header tanks....
another successful application.

    <Marv>

You are either up late or early Marv :-)

Paul
 
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