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Fwd: Jabiru 3300 starter

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jaybannist(at)cs.com
Guest

Posted: Thu Jun 04, 2009 2:05 pm Post subject: Fwd: Jabiru 3300 starter

Just wondering - Did anyone see this post ?

 

   

 

   

 

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klehman(at)albedo.net
Guest

Posted: Thu Jun 04, 2009 2:46 pm Post subject: Fwd: Jabiru 3300 starter

Yes but it has been discussed before and we all hoped someone else would 

answer...  



A conventional battery contactor draws almost 1 amp and can be on 

continuously.  A starter contactor is quicker acting, draws more like 4 

amps, and is intermittant duty. ie it will overheat and fail if 

energized continuously.



Your call on whether you need a starter contactor as well as a starter 

solenoid. Is there any chance that both are required for your warranty? 

I did not use a starter contactor on my subaru but I can kill a stuck on 

starter by killing a "battery" contactor on my bird. Solenoids on 

starters do occasionally but rarely stick on but the same is true for 

starter contactors. I judge the risk quite low for an automotive type 

starter solenoid and a glance at the voltage after start up confirms 

disengagement.



Ken



jaybannist(at)cs.com wrote:

[quote]   Just wondering - Did anyone see this post ?

 

 

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jaybannist(at)cs.com
Guest

Posted: Thu Jun 04, 2009 3:38 pm Post subject: Fwd: Jabiru 3300 starter

Ken,

 

 Thanks for the reply.  Because I have a Corvair engine, in the past, I have not looked at posts dealing specifically with Jabiru systems.  I think my confusion comes from the fact that the starter solenoid on my engine is tied to the started and there is no starter contactor.  I think from looking at the latest Jabiru wiring diagram, one or the other is required, but not both.  I'm just not sure what is included in the Jabiru FWF package.

 

 Thanks again - Jay

 

   

 

   

 

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frank.hinde(at)hp.com
Guest

Posted: Fri Jun 05, 2009 6:35 am Post subject: Fwd: Jabiru 3300 starter

Basically starter contactors are used in addition to the  solenoid on the starter purely to avoid having a permanently hot big fat wire  from the battery to the engine..In the extrordinarilly low risk event that the  wire should break and start flailing around under the cowling the consequences  are likely to be catastrophic..read fire or at least a boiled  battery.

  

 Low likelyhood/high catastrophy events are hard to quantify  in terms of how much protection to add. In the "real" airplane world they went  with the additional contactor..Automotive they didn't.

  

 Personally I'm comfortable either way...My current RV has a  starter contactor mainly cus it was in box..

  

 Frank



   From:  owner-aeroelectric-list-server(at)matronics.com  [mailto:owner-aeroelectric-list-server(at)matronics.com] On Behalf Of  jaybannist(at)cs.com

Sent: Thursday, June 04, 2009 4:35  PM

To: aeroelectric-list(at)matronics.com

Subject: Re:  Fwd: Jabiru 3300 starter

 

 Ken,



Thanks for the  reply.  Because I have a Corvair engine, in the past, I have not looked at  posts dealing specifically with Jabiru systems.  I think my confusion comes  from the fact that the starter solenoid on my engine is tied to the started and  there is no starter contactor.  I think from looking at the latest Jabiru  wiring diagram, one or the other is required, but not both.  I'm just not  sure what is included in the Jabiru FWF package.



Thanks again -  Jay



 



 



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