Matronics Email Lists Forum Index Matronics Email Lists
BBS Forum Interface to the Matronics Email Lists
 
 Get Email Distribution Too!Get Email Distribution Too!    FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Fwd: Re: Re: Question for Bob

 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> AeroElectric-List
View previous topic :: View next topic  
Author Message
nuckolls.bob(at)aeroelect
Guest





PostPosted: Mon Jul 16, 2018 6:26 pm    Post subject: Fwd: Re: Re: Question for Bob Reply with quote

Quote:
Date: Mon, 16 Jul 2018 20:59:53 -0500
To: aeroelectric-list(at)matronics.com
From: "Robert L. Nuckolls, III" <nuckolls.bob(at)aeroelectric.com>
Subject: Re: Re: Question for Bob

At 05:21 PM 7/16/2018, you wrote:
Quote:
--> AeroElectric-List message posted by: "Rocketman1988" <Rocketman(at)etczone.com>

Bob

This is just a simple drawing with reference to the Z-14.

Okay, I'm getting your thread confused with the
project using the EFII 'bus controller' . . . let
me back up.


Quote:
Quote:
The feeders to the "hot" busses are the ones in question. In the RV-10, the 3 contactors are located in the aft fuselage, while I would like the busses to be located forward, with c/b s accessible from the control seat.

Those two wires would each be around 10 feet long...


Yes, so now we need to consider the effects of
a failure of one of those relays.

Normally, we would like to have redundant systems
that do not depend on both used-to-be-a-battery
bus powered up.

A battery bus is generally the most reliable source
in the airplane . . . nothing between it and the battery.
Now we've got a piece of hardware there that capable
of killing the whole bus. The consequences of that
are best deduced before first flight . . . not after.



Bob . . .


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
Rocketman1988



Joined: 21 Jun 2012
Posts: 63

PostPosted: Tue Jul 17, 2018 7:17 am    Post subject: Re: Fwd: Re: Re: Question for Bob Reply with quote

Very true.

You posted a reply in another thread that stated battery contactor failures in flight are exceedingly rare. Hypothetically, you could put a battery contactor in the feed line to a forward buss. This contactor would be checked prior to every flight, as the engine could not be started if there was a failure, and the ability to isolate the battery is retained. Given that there would be two separate feeders to that buss, the likelihood of both contactors failing simultaneously would be quite small, leaving the buss powered in the event of a single failure.

Thoughts?


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
View user's profile Send private message
user9253



Joined: 28 Mar 2008
Posts: 1326
Location: Riley TWP Michigan

PostPosted: Tue Jul 17, 2018 9:02 am    Post subject: Re: Fwd: Re: Re: Question for Bob Reply with quote

Rocketman1988,
Your reasoning is valid. The chances of two contactors failing on a single flight are infinitesimal. Infinitesimal is defined as the the amount an aircraft carrier sinks in the water when a fly lands on its deck.


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List

_________________
Joe Gores
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> AeroElectric-List All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group