Matronics Email Lists :: View topic - Rear-Battery version of Z-19

Matronics Email Lists
Web Forum Interface to the Matronics Email Lists

Get Email Distribution Too! FAQ Search Memberlist Usergroups Register

Profile Log in to check your private messages Log in

Rear-Battery version of Z-19

Matronics Email Lists Forum Index -> AeroElectric-List

View previous topic :: View next topic

Author Message

nuckollsr(at)cox.net
Guest

Posted: Fri May 04, 2007 6:18 am Post subject: Rear-Battery version of Z-19

At the request of several builders, I've posted a rear-battery

version of Z-19 at:

http://aeroelectric.com/PPS/Adobe_Architecture_Pdfs/Z19RB_A_1.pdf



http://aeroelectric.com/PPS/Adobe_Architecture_Pdfs/Z19RB_A_2.pdf



The major differences between the front and rear-battery versions

is moving main bus feed from battery contactor to starter contactor.

Adding e-bus alternate feed relay to the main battery bus.



If you have an internally regulated alternator that is not a Plane

Power (built in OVP and absolute pilot control) then install the

interim Z-24 as described below. Later this year, you'll already

have hardware in place to upgrade the OVP/Control system shown

in.



http://aeroelectric.com/articles/Adapting_IR_Alternators_to_Aircraft.pdf

        Bob . . .



        ----------------------------------------

        ( IF one aspires to be "world class",  )

        ( what ever you do must be exercised   )

        ( EVERY day . . .                      )

        (                  R. L. Nuckolls III  )

        ----------------------------------------

- 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

n707sm

Joined: 07 Jun 2007
Posts: 6

Posted: Tue Jun 12, 2007 11:36 am Post subject: Re: Rear-Battery version of Z-19

Hi Bob,



Thank you for all you do to support the Experimental community and especially for your time and effort spent to create Architecture drawings such as the new Z-19/RB!



I am implementing this architecture in my Eggenfellner powered RV-7A and I have a few questions:



1) For each battery (minus) it's shown to connect locally to the airframe.  Providing that good, secure connections with 4AWG (or welding cable) are done locally, does this negate the need to run heavy (2AWG or 4AWG) ground cabling forward?

2) Relates to question 1.  If it's necessary to run ground cabling forward, is it acceptable/reasonable to instead: a) Connect the battery minus posts with a single, short welding cable, and b) Connect another single short welding cable for local ground, and c) continue with a single large (2AWG or 4AWG) cable forward to connect to the Brass Firewall Thru Bolt for the Firewall, Panel and downstream Avionics ground busses?  (This seems overdone, redundant and heavy to me, but I just want to be sure I haven't missed something here)

3) I have located all of the components for this architecture drawing with the exception of the E-BUS ALT FEED RELAY.  Would you mind please providing a suggested supplier/part for this component?



Thank you again!



Very best regards,

Michael O'Brien

- 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

nuckollsr(at)cox.net
Guest

Posted: Tue Jun 12, 2007 2:01 pm Post subject: Rear-Battery version of Z-19

At 12:37 PM 6/12/2007 -0700, you wrote:



 	  Quote: 	
		  



Hi Bob,



Thank you for all you do to support the Experimental community and 

especially for your time and effort spent to create Architecture drawings 

such as the new Z-19/RB!



I am implementing this architecture in my Eggenfellner powered RV-7A and I 

have a few questions:



1) For each battery (minus) it's shown to connect locally to the 

airframe.  Providing that good, secure connections with 4AWG (or welding 

cable) are done locally, does this negate the need to run heavy (2AWG or 

4AWG) ground cabling forward?


	


    Yes.



 	  Quote: 	
		  2) Relates to question 1.  If it's necessary to run ground cabling 

forward, is it acceptable/reasonable to instead: a) Connect the battery 

minus posts with a single, short welding cable, and b) Connect another 

single short welding cable for local ground, and c) continue with a single 

large (2AWG or 4AWG) cable forward to connect to the Brass Firewall Thru 

Bolt for the Firewall, Panel and downstream Avionics ground busses?  (This 

seems overdone, redundant and heavy to me, but I just want to be sure I 

haven't missed something here)


	


    There's a boatload of ol' mechanic's tales out there about

    the hazards of local grounds in aircraft. Aside from the obvious

    and predictable issues involving ground loops (when particularly

    vulnerable systems share grounds spread out over the airframe),

    there are no great concerns for using the airframe as a primary

    ground structure. There's some value in considering the used of

    a separate ground wire for tubular structures where we've see

    some instances of structure getting magnetized due to high current

    flow . . . but that doesn't apply to you.



 	  Quote: 	
		  3) I have located all of the components for this architecture drawing with 

the exception of the E-BUS ALT FEED RELAY.  Would you mind please 

providing a suggested supplier/part for this component?


	


    Any sealed plastic power relay in the 20+ amp class is fine.

    B&C sells their S704-1. This product from Radio Shack



http://tinyurl.com/2sno9m



    is fine too.



 	  Quote: 	
		  Thank you again!


	


    My pleasure sir.



    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

n707sm

Joined: 07 Jun 2007
Posts: 6

Posted: Mon Jun 18, 2007 9:26 am Post subject: Re: Rear-Battery version of Z-19

Hi Bob,



In Z-19/RB, it's called out to use 6" or less 12AWG between the Main and Engine Battery contactors and their respective busses.  Without building a special mount for this, I could locate these busses close to the contactors but I would probably need about 15" of wire each.  Would your suggestion be to go to 10AWG in this case? 



Thank you again   



Best Regards,

Michael

- 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

nuckollsr(at)cox.net
Guest

Posted: Mon Jun 18, 2007 6:14 pm Post subject: Rear-Battery version of Z-19

At 10:26 AM 6/18/2007 -0700, you wrote:



 	  Quote: 	
		  



Hi Bob,



In Z-19/RB, it's called out to use 6" or less 12AWG between the Main and 

Engine Battery contactors and their respective busses.  Without building a 

special mount for this, I could locate these busses close to the 

contactors but I would probably need about 15" of wire each.  Would your 

suggestion be to go to 10AWG in this case?


	


   That's not necessary. 12AWG is good for 15+ amps. I doubt that

   you're going to have battery bus totals that exceed that

   value!



   That 6" "rule" is a real loose thing. Obviously a well

   installed wire that's a bit longer isn't going to present

   that much increase in crash safety hazard.



   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

Display posts from previous:

	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