Hello Gilles
One more time:
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2) I don't absolute agree with Gilles, if wired as per Europa, if
for any
reason battery is not putting out, 1 pump will run off of generator
(provided it is excited, which would have happened upon start up)
That's the main point concerning the circuit : you have redundancy
PROVIDED
the regulator is working.
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If using 1 battery and Rotax generator, if both pumps are wired to main
bus, both would be dead if:
Master switch failed or was turned off
Battery isolator failed
30 amp slow blow fuse in series with main bus feed opened
If wired as per Europa, primary will run as long as generator and
regulator is functioning.
Take a look at Europa 914 schematic so we are on same page:
http://www.europa-aircraft.biz/pdfs/buildersmanuals/CBM%20-%2025%20-%20ELECTRICAL%20SYSTEM.pdf
On page #11
Unless B+ was shorted at regulator, by closing alternator output switch
power to primary pump will be provided from the battery should the
regulator fail, or OVP take it off line.
In other words you can run both pumps off battery with an added bonus of
being able to run 1 pump exclusive off generator.
Ron P.
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