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Jabiru 3300 starter

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jaybannist(at)cs.com
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Posted: Tue Jun 02, 2009 6:34 pm Post subject: Jabiru 3300 starter

I am helping a friend put together a power schematic for a Jabiru 3300.  I have seen several sample schematics that have both a starter solenoid and a starter contactor.  Is this really what is required and if so why ?  Is a starter contactor any different than a battery contactor?

 

 Jay Bannister

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rdunhamtn(at)hotmail.com
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Posted: Thu Jun 04, 2009 5:26 pm Post subject: Jabiru 3300 starter

Jay C

  

 I have a Jab six-banger on my Sonex.

  

 The Jabiru 3300A engine starter does not require a "solenoid". A simple starter contactor is sufficient. This requires a "hot" wire to the contactor via a starter button (or whatever device you prefer) to activate or close the relay during engine crank.

  

 As to whether to use a battery contactor C I would say this. There are electrical architectural drawings in the Aeroelectric Connection to satisfy either iteration. My first plane did not use a BAT contactor. My Sonex has one. The advantage of using the BAT contactor C IMHO C is that by turning off the Master Switch (such as in emergencies) you are able to achieve what I call "max cold" conditions. The least stuff is energized and chances of a fire are therefore (theoretically) less. The other advantage is that C by using small wires to activate the relay C you don't have fat wires on the panel. The advantages there are threefold. Less current C less chance of RFI and simpler wiring at the panel.

  

 Now C I must hasten to add that I am not an expert. I'm a fan. I have wired three planes so far according to the 'Connection and all have performed as expected with no significant electrical issues. The most important things which must drive any and all decisions in wiring airplanes is that you understand the architecture C make decisions based on sound physics and do the best craftsmanship you are able!

  

 Rodney in Tennessee

Unabashed Nuckollhead

  

 DO NOT ARCHIVE

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jaybannist(at)cs.com
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Posted: Thu Jun 04, 2009 5:54 pm Post subject: Jabiru 3300 starter

Rodney,

 

 Thanks for the reply.  I have a background in electronics (from a LONG time ago), but I still get baffled by some of the airplane wiring diagrams I see.  Believe me, I insist on understanding everything about a schematic before I settle on it. Nuckolls usually clears up things I don't understand.

 

 Humm - "Nuckollhead" can take on an entirely different meaning from its usual application. Guess I consider myself that other kind {;>)

 

 Jay

 Do not archive

 

   

 

   

 

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