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Posted for Scot Stambaugh <sstambaugh@qualcomm.com>:
One comment about wiring your redundant electric fuel pumps in parallel, if either fuel pump happens to fail with a shorted motor winding(not an uncommon failure mode) that pump will cause the circuit protection to trip and will leave the other fuel pump unusable. There goes your redundancy. You might consider separate circuits, including fuses/circuit breakers and control switches to achieve true redundancy.
scot
At 11:59 AM 8/5/2002, you wrote:
Yes, I must manage the wing tank fuel use by manually switching the selector
valve but find it easy to do. I have a single pump switch for fuel transfer
(the transfer pumps are wired in parallel) and an indicator to warn when the
header tank is full.
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