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1. 01:40 AM - Re: Capacitor (Gilles Thesee)
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NYTerminat@aol.com a crit :
> *e ignition. It has nothing to do with keeping the engine running.
> The capacitor is there to alleviate any spikes from the charging dynamo. *
>
> ...
>
> *The battery is not needed to keep the engine running.*
Hi all,
True for the 912 and 912S, but the Rotax 914 is electrically dependant,
and does need an electrical source to keep the engine running.
One needs two independant electrical sources to have a reasonable engine
redundancy.
At the time, I made some lengthy experiments with the Rotax alternator
and regulator. The capacitor is definitely needed to ensure proper
working of the regulator.
Some info here :
http://contrails.free.fr/elec_ducati_en.php
The main failure mode for the regulator, is from to high current draw.
It does seem reasonable to expect more than about 12 amps continuous.
The regulator doesn't come to life if a sufficient voltage is not
applied to the sense wire, or if the alternator stalls, and the battery
or regulator is depleted.
As already stated, Bob Nuckolls has designed remarkable circuits for the
Rotax installation, including OV protection, which I think is a must
because of the miserable service record of the Rotax regulator.
Due to its shortcomings, I ended up bench testing and installing a
Schicke GR 4 regulator.
Regards,
Gilles Thesee
http://contrails.free.fr
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