heedh23
Joined: 05 Sep 2014
Posts: 4
Location: Washington, USA
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 Posted: Sat Mar 12, 2022 7:35 am Post subject: Z101B procedure question |
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I have a first draft of my load requirements, and I'm starting to think about normal and emergency procedures for my project - what is the quickest flow to verify each feed mechanism for each bus during preflight/runup, etc.
My question is this - for critical portions of flight, like takeoff/approach, when you'd like the system to just temporarily mitigate a failure so the pilot can focus on flying the plane, I expect to have all three switches active. This means the primary battery and alternator, the aux bus and alternator, and the E-bus feed. This enables the pilot to quickly triage and ignore any failure until the critical phase of flight is done. Goal is continued flight (or landing) with no switch throwing at low altitude or when task saturation is high.
So coming to my question - is there any reason not to use this configuration for normal operations? The auxiliary alternator will be turning no matter what, and its regulator should keep its output off unless bus voltage dips. Similarly, it seems like the bus feed diodes should be fine as long as they're OK thermally.
Is this a reasonable way to operate this distribution system? Or should the alternate bus feeds and secondary alternator be de-energized during non-critical flight?
-Ed
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