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nuckolls.bob(at)aeroelect
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 Posted: Fri Oct 02, 2015 7:31 am Post subject: Grounding Question On dual Buss Dual Battery Aircraft |
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At 01:13 AM 10/2/2015, you wrote:
| Quote: | Hey Trent, my favorite aeroplane!
What power plant?
On 2 October 2015 at 01:22, Trent Heidtke <theidtke(at)cox.net (theidtke(at)cox.net)> wrote:
Hello everyone, I am new here, building a Prescott Pusher, and have a question. My plane is totally electric dependent and so I have been following the Aero Connection Diagram Z-19 which addresses an outline for a dual battery, single alternator, and totally electronic fuel injection system. Additionally, I have subscribed 100% to the wiring philosophy whereby all powered device grounds go directly to the battery running the device instead of the massive common ground to frame approach |
Please don't do this. See Figure Z-15. ONE ground for all potential antagonists on the
firewall . . . batteries ground here too. This ground gets a good connnection to the
welded frame as well. ONE ground for all potential victims on
the panel with a single feed path between panel ground and firewall ground.
It's okay to use the frame as a ground for remotely located antagonists . . .
just don't run battery charging currents or starter currents through the
frame.
Had the pleasure of working with Mr. Prescott during my first
tenure at Beech in the Targets Division.
Bob . . . [quote][b]
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theidtke(at)cox.net
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| Posted: Fri Oct 02, 2015 2:16 pm Post subject: Grounding Question On dual Buss Dual Battery Aircraft |
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Thank you Bob and everyone that replied to my request for help. It is very much appreciated. While I can read and implement schematics done by people way more intelligent than I, it is hard sometimes to discern the finer points that years of experience yields those who have been there and lived that. Based on the feedback, I am commencing to rewire the parts that need to be changed to comply more with the wisdom shared here.
Regarding the Pusher project, it has been an amazing journey and both Ole Sindberg, and Tom Prescott have been immensely helpful (only 2 Prescott Pushers flying in the US to my knowledge). I hope that first flight will be in about 18 months now that I am back full time on the project. At present though, the wiring help will ensure success in that department so thank you all again.
The next big challenge after wiring is making sure the Mazda 20B installation goes well. Glad there is an engine thread/forum as well for that…. 
Trent
From: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of Robert L. Nuckolls, III
Sent: Friday, October 02, 2015 8:28 AM
To: aeroelectric-list(at)matronics.com
Subject: Re: Grounding Question On dual Buss Dual Battery Aircraft
At 01:13 AM 10/2/2015, you wrote:
Hey Trent, my favorite aeroplane!
What power plant?
On 2 October 2015 at 01:22, Trent Heidtke <theidtke(at)cox.net (theidtke(at)cox.net)> wrote:
Hello everyone, I am new here, building a Prescott Pusher, and have a question. My plane is totally electric dependent and so I have been following the Aero Connection Diagram Z-19 which addresses an outline for a dual battery, single alternator, and totally electronic fuel injection system. Additionally, I have subscribed 100% to the wiring philosophy whereby all powered device grounds go directly to the battery running the device instead of the massive common ground to frame approach
Please don't do this. See Figure Z-15. ONE ground for all potential antagonists on the
firewall . . . batteries ground here too. This ground gets a good connnection to the
welded frame as well. ONE ground for all potential victims on
the panel with a single feed path between panel ground and firewall ground.
It's okay to use the frame as a ground for remotely located antagonists . . .
just don't run battery charging currents or starter currents through the
frame.
Had the pleasure of working with Mr. Prescott during my first
tenure at Beech in the Targets Division.
Bob . . . | Quote: | | http://www.matronics.com/Navigator?AeroElectric-List |
0123456789
[quote][b]
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nuckolls.bob(at)aeroelect
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| Posted: Fri Oct 02, 2015 2:18 pm Post subject: Grounding Question On dual Buss Dual Battery Aircraft |
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At 04:53 PM 10/2/2015, you wrote:
| Quote: | Hi Bob,
The Prescott Pusher I am building is using a Mazda 20B 3-rotor engine. I live in the AZ desert so particularly in the summer when going North to Prescott, Sedona, or Flagstaff I need a bit more than 200 HP/60 inch prop (original spec’d items) to get me off the ground. Mazda 3-rotor was about the only weight/HP choice to keep W/B about as close to original as possible. Still about a year and a half from finishing but everything has been on it to check fit/function. Just trying to make sure I am doing wiring right at this point.
Trent |
Understand. Have you crafted a load analysis
and prioritized loads under various operating
and failure modes?
Bob . . . [quote][b]
| | - 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:
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