alt switc
PS:
1. this was a new rectifier 3 years ago and has 225 hours on it
2. Thanks to your and other comments on the forum although it is on the
engine side of the firewall, it does have its own cooling air supply via a
scat hose from a small scoop in the cowling inlet.
William Daniell
LONGPORT
+1 786 878 0246
On Wed, May 13, 2020 at 8:52 AM William Daniell <wdaniell.longport@gmail.co
m>
wrote:
> Mmmm thanks
>
> So where did the question come from?
>
> I have a 912 turbo with a skyview.
>
> About once a flight my amps go up off the chart - 70a - ending up with a
> red x on the screen (no sparks or smoke :-)). After which the instrumen
t
> comes alive and the amps reduce to normal 7-10 depending on the load. And
> remain normal thereafter.
>
> When the amps are climbing the reading can be "reset" by turning off the
> alternator and then turning it back in again.
>
> I have a hall effect sensor on the thick wire which charges the battery
> and this changes very little as on would expect.
>
> I asked the europa and the aeroelectric forums and dynon. Several people
> said they had similar events. So having checked the wiring i assumed
> that this was a dynon bug.
> AND ....I always understood that the alternator was unable to produce mor
e
> than 18A hence people adding external alternator. But is thus a fair
> assumption?
>
> Could it be a faulty regulator?
>
> Will
>
>
> William Daniell
> +1 786 878 0246
>
> On Wed, May 13, 2020, 06:41 Gilles Thesee <gilles@elixir-aircraft.com>
> wrote:
>
>> Le 13/05/2020 =C3- 04:17, William Daniell a =C3=A9crit :
>>
>>
>> *Fortunately my 912 turbo will run at low boost on just the mechanical
>> pump so i am not electrically dependant.*
>>
>> *On another note what is the max possible amps produced by the rotax alt
?
>> *
>>
>>
>> Will,
>>
>> We found that the alternator can easily supply its short circuit limit
>> current of 21A without thermal distress.
>> The limiting item is the voltage regulator.
>>
>>
>> --
>> Best regards,
>> Gilles
>> http://contrails.free.fr
>> http://lapierre.skunkworks.free.fr
>>
>
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