Mailing List lml@lancaironline.net Message #59228
From: Bill Harrelson <n5zq@verizon.net>
Sender: <marv@lancaironline.net>
Subject: Re: [LML] Re: Fw: Re: Re-doing my panel - carefully thinking through failures
Date: Sun, 07 Aug 2011 10:56:47 -0400
To: <lml@lancaironline.net>
Bill,
 
My avionics switch is a DPST switch. Basically two switches in one. Each side controls the power feed from one electrical system. Sure, both sides of the switch could fail at the same time but that would be unlikely. On top of that I have a separate, isolated switch that feeds power only to the GPS/Com so that even if both sides of the avionics switch should fail or both electrical system 1 and 2 fail, I can power this unit from system 3. System 3 is an 8 amp B&C generator and an Odyssey 545 battery.
 
Bill Harrelson
N5ZQ 320 1,950 hrs
N6ZQ  IV under construction
 
 

Fred,

Even with all the extra weight and redundancy, your avionics are all reliant on a single switch.  If that $7 switch goes, your plane is blind, deaf, and dumb!  The aeroelectric list does not recommend an avionics buss.  This is part of the reason for that.

Bill B

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