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Electric System architecture (was Charging the Aux Battery)

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trigo(at)mail.telepac.pt
Guest

Posted: Thu Oct 03, 2013 10:58 am Post subject: Electric System architecture (was Charging the Aux Battery)

Please see answers below

 

-----Mensagem original-----

De: owner-aeroelectric-list-server(at)matronics.com [mailto:owner-aeroelectric-list-server(at)matronics.com] Em nome de Robert L. Nuckolls, III

Enviada: 1 de outubro de 2013 22:18

Para: aeroelectric-list(at)matronics.com

Assunto: RE: Charging the Aux Battery

 

--> AeroElectric-List message posted by: "Robert L. Nuckolls, III" 

--> <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)>

 

At 11:41 AM 10/1/2013, you wrote:

 	  Quote: 	
		  --> AeroElectric-List message posted by: "Carlos Trigo" 

<trigo(at)mail.telepac.pt (trigo(at)mail.telepac.pt)>

 

Bob

 

Thank you for the dissertation about the theme I had proposed.

I confess that I still didn't read it thoroughly, so I will have to 

digest it conveniently.

 

Meanwhile, I can confirm that my question was not academic, I am 

building an

RV-10 and did consider the Dual battery, One main Alternator - one Aux 

alternator system.

 

So far, I am considering a variation of the Z-14 architecture, but 

still didn't reach the "end of the line" in what regards the final 

schematic, so would appreciate all suggestions.

 

Regards

Carlos

 
	


    Understand. I presume your airplane will

    be Lycoming powered and has a accessory

    pad that will NOT be occupied with a vacuum

    pump.

Correct

 

    Do you plan to fly a significant portion of

    your use under instrument flight rules, over

    mountainous terrain or at night?

Not a significant portion.

But it would be nice to be able to fly IFR and at night.

 

    Do you plan to have a gps aided wing-leveler

    or better?

Better, planning an auto-pilot.

 

    Engine electrically dependent in any way?

It is a IO-540

 

    You need to compile a list of every currently

    anticipated electro-whizzy. If you have actual

    running current for each device, record that value

    along. Peak currents too even if intermittent.

Already done an excel table with A consumptions

 

    Do any of these accessories feature built in

    back up batteries and/or connections brought

    out for dual power sourcing?

Yes, the EFIS will be dual power sourcing.

I am using a VP-X Pro box.

 

    How do you rate yourself for competence/confidence

    that under total loss of panel instrumentation,

    you could get to where you originally intended to

    go with flight bag back-ups?

Well, not so sure, but I do like to fly with the old paper map over my knee…

And I suppose an iPad with electronic charts will also travel in the glove box

 

    Since this is a 4-seated airplane, your approach

    toward risk mitigation is understandably more

    conservative. It's not necessary that your self-

    assessments be shared with the List but do put

    some thought into the skill set you plan to have

    in your bag of tricks by the time you're ready

    to launch with all the seats occupied.

Yeah, right

 

    ……….

 

    If this were MY airplane, I'd be trading off

    cost of ownership and practical utility of

    every installed accessory while maintaining

    the notion that under the worst case conditions,

    I might have to dig the hand held radios out

    of the flight bag.  A very tiny risk to be sure

    but it's your personal confidence level for making

    plan-C . . . D or whatever save your buns.

I also like to have an hand-held radio in the bag of tricks

 

    Hence the real driver for choosing how much stuff

    you hang on the panel has more to do with how

    well you think you can do without it. If your

    confidence level is low, then a plan-b for loss

    of any particular item gets elevated in priority.

 

    THESE mental exercises will drive how many

    alternators, batteries, busses and kilobux worth

    of hardware will fly with you every flight whether

    routinely useful or not. So mission profiles,

    skill sets, FMEA and load analysis is where the

    planning starts.

 

Ok, now what do you think?

 

Carlos  

  [quote][b]

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michaelrorth

Joined: 04 Feb 2011
Posts: 65

Posted: Thu Oct 03, 2013 12:35 pm Post subject: Electric System architecture (was Charging the Aux Battery)

Bob & Carlos,

  

 What a great, and insightful, exchange of information and  facts.

 Clear, concise, and easily readable.

  

 Keep it up,

 Michael

        From: Carlos Trigo (trigo(at)mail.telepac.pt) 

 Sent: Thursday, October 3, 2013 12:00 PM

 To: aeroelectric-list(at)matronics.com (aeroelectric-list(at)matronics.com)  

 Subject: RE: Electric System architecture (was  Charging the Aux Battery)



    

Please see answers  below 

  

-----Mensagem original-----

De:  owner-aeroelectric-list-server(at)matronics.com  [mailto:owner-aeroelectric-list-server(at)matronics.com] Em nome de Robert L.  Nuckolls, III

Enviada: 1 de outubro de 2013 22:18

Para:  aeroelectric-list(at)matronics.com

Assunto: RE: Charging the  Aux Battery 

  

--> AeroElectric-List message posted by: "Robert L.  Nuckolls, III"  

--> <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> 

  

At 11:41 AM 10/1/2013, you wrote: 

 	  Quote: 	
		  --> AeroElectric-List message posted by: "Carlos  Trigo"  

<trigo(at)mail.telepac.pt (trigo(at)mail.telepac.pt)> 

 

Bob 

 

Thank you for the dissertation about the theme I had  proposed. 

I confess that I still didn't read it thoroughly, so I  will have to  

digest it conveniently. 

 

Meanwhile, I can confirm that my question was not  academic, I am  

building an 

RV-10 and did consider the Dual battery, One main  Alternator - one Aux  

alternator system. 

 

So far, I am considering a variation of the Z-14  architecture, but  

still didn't reach the "end of the line" in what  regards the final  

schematic, so would appreciate all  suggestions. 

 

Regards 

Carlos 

  
	


    Understand. I presume your airplane  will 

    be Lycoming powered and has a  accessory 

    pad that will NOT be occupied with a  vacuum 

    pump. 

Correct 

  

    Do you plan to fly a significant  portion of 

    your use under instrument flight rules,  over 

    mountainous terrain or at  night? 

Not a significant  portion. 

But it would be nice to be  able to fly IFR and at night. 

  

    Do you plan to have a gps aided  wing-leveler 

    or better? 

Better, planning an  auto-pilot. 

  

    Engine electrically dependent in any  way? 

It is a  IO-540 

  

    You need to compile a list of every  currently 

    anticipated electro-whizzy. If you have  actual 

    running current for each device, record  that value 

    along. Peak currents too even if  intermittent. 

Already done an excel table  with A consumptions 

  

    Do any of these accessories feature  built in 

    back up batteries and/or connections  brought 

    out for dual power  sourcing? 

Yes, the EFIS will be dual  power sourcing. 

I am using a VP-X Pro  box. 

  

    How do you rate yourself for  competence/confidence 

    that under total loss of panel  instrumentation, 

    you could get to where you originally  intended to 

    go with flight bag  back-ups? 

Well, not so sure, but I do  like to fly with the old paper map over my knee… 

And I suppose an iPad with  electronic charts will also travel in the glove box 

  

    Since this is a 4-seated airplane, your  approach 

    toward risk mitigation is  understandably more 

    conservative. It's not necessary that  your self- 

    assessments be shared with the List but  do put 

    some thought into the skill set you  plan to have 

    in your bag of tricks by the time  you're ready 

    to launch with all the seats  occupied. 

Yeah,  right 

  

    ………. 

  

    If this were MY airplane, I'd be  trading off 

    cost of ownership and practical utility  of 

    every installed accessory while  maintaining 

    the notion that under the worst case  conditions, 

    I might have to dig the hand held  radios out 

    of the flight bag.  A very tiny  risk to be sure 

    but it's your personal confidence level  for making 

    plan-C . . . D or whatever save your  buns. 

I also like to have an  hand-held radio in the bag of tricks 

  

    Hence the real driver for choosing how  much stuff 

    you hang on the panel has more to do  with how 

    well you think you can do without it.  If your 

    confidence level is low, then a plan-b  for loss 

    of any particular item gets elevated in  priority. 

  

    THESE mental exercises will drive how  many 

    alternators, batteries, busses and  kilobux worth 

    of hardware will fly with you every  flight whether 

    routinely useful or not. So mission  profiles, 

    skill sets, FMEA and load analysis is  where the 

    planning starts. 

  

Ok, now what do you  think? 

  

Carlos   

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   [quote][b]

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