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Wiring diagram for Jabiru 3300 with a SD 8 on the Vac Pad

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nuckolls.bob(at)aeroelect
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Posted: Sat Sep 04, 2010 9:55 am Post subject: Wiring diagram for Jabiru 3300 with a SD 8 on the Vac Pad

At 01:01 AM 9/4/2010, you wrote:

 	  Quote: 	
		  



Has anyone got a wiring diagram for this setup, the Z12 setup is 

close but needs some mod for the jab 3300 and different regulators. 

Any suggestions appreciated.


	


   The z-figures are ARCHITECTURE drawings and not intended

   to recommend or limit the kinds of regulators or alternators

   used.



 	  Quote: 	
		  Can both alternates feed continuously into the main bus and battery ?

I'm setting up for IFR so need a bit more juice than the j3300 Alt provides


	


   Hmmmm . . .what kind of IFR? Occasional penetration of

   cloud cover? Occasional descent to conditions under

   a cloud layer followed in short order by a published

   approach?



   The reason for asking is that setting up your system

   to DEPEND on two mutually cooperating alternators

   running in parallel for extended IFR ops, perhaps with

   an autopilot, is not something I'd recommend for this

   combination of hardware.



   The idea behind all of Main/Aux alternator configurations

   is that the main alternator does everything you need done

   for all normal operations. The Aux alternator wilt get

   you on the ground if the Main alternator is not available

   but with a reduced power budget. Do I infer correctly that

   your proposed IFR ops takes more than 15A to keep necessary

   things operational?



   What does your load analysis look like for your

   IFR ops?

   Bob . . .

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ple190

Joined: 03 Sep 2010
Posts: 23
Location: Australia

Posted: Sat Sep 04, 2010 10:38 pm Post subject: Re: Wiring diagram for Jabiru 3300 with a SD 8 on the Vac

Thanks Bob

It would only be occasional penetration of cloud for getting in or out not planning to cruise in IMC. My load analysis is cruise about 15 amps but on approach in Imc with lights off (all leds) and pitot on load is about 17 so not much margin with the J3300 alternator (I'm estimating about 6 amps for a dual screen Dynon skyview system ) Just don't want a discharge light on half way through an approach !

Maybe its overkill to go dual Alternators ?

Paul

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