Ron,
Wire the 2nd boost pump as the Europa manual and Rotax Installation
diagrams indicate is light and simple with good redundancy. The only
deviations I do are in a dual generator setup when a 2nd battery and non
tied bus is used (you could call it an E bus) runs the other pump and
associated emergency electrics. The E bus derives power from the rotax
alternator, and the other pump off the main bus is charged by the belt
driven alternator. My other is to have a single small battery charged
off a shot key diode which drives the secondary pump. In the event of a
primary bus failure, you have to turn on the secondary pump and now have
a 30 minute battery to get you on the ground. You can get into endless
number of what if's in these scenarios and become the office of
redundant redundancy.
Many are flying with both pumps wired to the main bus. If the master
solenoid fails, and you use a relay to control the Rotax alternator, you
can loose fuel pump power permanantly if the main bus / master solenoid
fails.
The Europa/Rotax method is simple and it works.
Bud Yerly
----- Original Message -----
From: rparigor@suffolk.lib.ny.us<mailto:rparigor@suffolk.lib.ny.us>
To: europa-list@matronics.com<mailto:europa-list@matronics.com>
Sent: Sunday, December 21, 2008 3:01 PM
Subject: Europa-List: Has anyone landed 914 on pump #1 run by
generator only?
Curiosity question. Has anyone had a failure where the only way you
could keep 914 running was by Europas schematic that has you wiring fuel
pump #1 direct to generator?
Thx.
Ron Parigoris
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