alt switc
PPS - I have the OVP as required on the Z16 and this has not tripped.
William Daniell
LONGPORT
+1 786 878 0246
On Wed, May 13, 2020 at 9:09 AM William Daniell <wdaniell.longport@gmail.co
m>
wrote:
> 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.com> 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 instrume
nt
>> comes alive and the amps reduce to normal 7-10 depending on the load. An
d
>> 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 peopl
e
>> 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
>> more than 18A hence people adding external alternator. But is thus a fa
ir
>> 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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