Robert Reed
Joined: 22 Oct 2009
Posts: 331
Location: Dallas/Ft.Worth
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 Posted: Mon Nov 05, 2018 12:41 pm Post subject: Dual Battery Dual Alternator Power Distribution System |
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Bob,
Thank you for making that point clear about no bus at risk for complete loss of power in the Z-14 design. I am no expert on the electrical systems and won't even claim a novice status but I do claim to be very logical and I could not see a total failure situation in the Z-14 as long as you had a cross feed engaged and you have not lost everything. That is the reason that I decided to go with the Z-14 for my plane and I don't think I will be disappointed. The reality is that it was not that difficult to understand or incorporate. Besides I like having the extra battery power for starting.
Thanks for your designs,
Bob Reed
From: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com>
To: aeroelectric-list(at)matronics.com
Sent: Monday, November 5, 2018 1:56 PM
Subject: Re: Re: Dual Battery Dual Alternator Power Distribution System
| Quote: | | Please help me to understand why using the redundant feeds might be a bad idea. Thanks. |
Not necessary . . . already built in . . .
There is no bus in Z-14 at risk for
complete loss of power. Bizjets often offer
double or triple fed busses . . . the
Beechjet 400 had one. But the FMEA in that
airplane is a snarl of snakes.
I wrote a proposal once for splitting the
battery capacity into two separate devices
and doing a Z14-like architecture. Everyone
thought it would be a good thing . . . everyone
knew that the re-certification costs would be
breathtaking. Everyong knew that there was
no customer demand for the feature.
With the cross-feed capability, no single failure
will put any bus into a battery-only configuration . . .
much less total loss of power.
Bob . . .
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