I did a little checking and you can't push fuel through the VW mechanical
pump so a backup system would entail, at minimum, a couple check valves and
an electric pump...a bit more complicated that I care to make it. I see
Facet has pumps that will flow through so you can run them in series as a
How about NO pump? Gravity from header tank only. Though I have used
electric pump to feed the header tank-from wing tanks.
-Original Message-
From: Phillip Hill
Sent: Saturday, February 08, 2014 10:14 AM
To: KRnet
Subject: KR> VW mechanical pump or electric pump
Hi guys and g
Why not copy the Piper design with a mechanical (diaphram) and electric in
series? Diaphrams do fail, but only from neglect. I'd use a stock VW pump and
replace it every other year in an excess of caution. Peter
>All the VW s I've had over the years,> I don't recall ever having one go bad.
[mailto:krnet-bounces at list.krnet.org] On Behalf Of Phillip Hill
Sent: Saturday, February 08, 2014 10:15 AM
To: KRnet
Subject: KR> VW mechanical pump or electric pump
Hi guys and gals. I'm going to opt for a GPASC flywheel drive engine on my
KR2. So the question is, mechanical pump or elect
Phillip Hill wrote
>All the VW s I've had over the years,
> I don't recall ever having one go bad. I'd like to have a plan b though.
> What you all think?
One thing to consider is that when the VW pump does fail due to a diaphragm
rupture, fuel is free to flow into the engine block, and
Dan Heath wrote:
>>It should not be a problem with the mechanical if fuel can be pumped thru
the mechanical if it stops working. The Facet electrical will flow thru.<<
There are some Facet pumps that have what Facet calls "positive shutoff"
(PSO), which besides being an anti-siphon valve,
Hi guys and gals. I'm going to opt for a GPASC flywheel drive engine on my
KR2. So the question is, mechanical pump or electric. I'm thinking using
electric pumps instead of the mechanical for the ability to have a backup
pump. It will be simpler to implement a backup solution with the
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