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Re : RE: Re : wiring

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Gilles.Thesee(at)ac-greno
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Posted: Thu Jul 27, 2006 3:04 am Post subject: Re : RE: Re : wiring

----- Message d'origine -----

De: nigel charles <nwcmc(at)tiscali.co.uk>

Objet: RE: Re : wiring



 	  Quote: 	
		   

 <nwcmc(at)tiscali.co.uk>

 

 >The Rotax regulator needs a definite voltage to continue providing

 power. Disconnect it, or have it fail, or run your battery down, and

 you're left with very few option to keep your engine running.<

 

 Not true. If you disconnect the battery with the engine running the

 generator continues to supply the electrical system until the revs 

 dropto idle. Even then, restoring the revs above idle results in the

 generator picking up the load.

 


	


Hi Nigel,



 We run the regulator that came with our 914 on the bench, and once disconnected, it won't come to life if the battery is down or off line, regardless of the RPM. This lead to a series of scenarii where we could be left with no power.



Of course it is possible that not all Rotax regulators are the same internally, or you found a particular mode we failed to explore in  our experiments. I would be interested in more experimental details on your findings. I could publish them in addition to our measurements.



Best regards,

Gilles

http://contrails.free.fr

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nwcmc(at)tiscali.co.uk
Guest

Posted: Sun Jul 30, 2006 8:12 am Post subject: Re : RE: Re : wiring

All I can say is that after having done an external battery start one

day I forgot to reinstate the onboard battery before disconnecting the

external power so hence the comments below.



Nigel Charles



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paul.mcallister

Joined: 09 Jan 2006
Posts: 177
Location: Waukesha, WI USA

Posted: Sun Jul 30, 2006 10:55 am Post subject: Re : RE: Re : wiring

Nigel, Gilles



I have had the same experience as Nigel during systems failure mode check

outs.  Once the regulator was excited it continued to run.



I suspect that there might be some variation between regulators that account

for this.  Actually (touch wood) my regulator has 470 hours / 2.5 years on

it and so far it is holding up well.  I am hoping that a combination of a

modest load and a cool location is going to keep it that way.



Regards, Paul



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