Today's Message Index:
----------------------
1. 04:18 AM - Re: KT 76 Installation Manual (Nati Niv)
2. 07:33 AM - KT76A/78A Manual (Ian Crowe)
3. 09:48 PM - Rotax 912 UL alternator drop-out (Paul Kuntz)
Message 1
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Subject: | Re: KT 76 Installation Manual |
Here ya go, good luck
On Wed, Aug 7, 2013 at 10:14 PM, Matt Stecher <mrcc1234@sbcglobal.net>wrote
:
> I am in need of the KT 76 transponder installation manual since I can=92
t
> seem to find it any place. ****
>
> ** **
>
> I talked with BendixKing today and for some reason they can no longer
> share it. I did find the pinout diagram that is on the Aeroelectric site,
> but I would like the entire manual to be sure that I don=92t miss anythin
g.*
> ***
>
> ** **
>
> Thanks everyone and fly safe,****
>
> Matt Stecher****
>
> Varieze N54EG rebuild****
>
> *
>
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> *
>
>
Message 2
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Subject: | KT76A/78A Manual |
I also have one. Bob if you want it to copy it is yours. Tell me where
to send it.
Ian B. Crowe
LNC 2 C-FKRO
Message 3
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Subject: | Rotax 912 UL alternator drop-out |
I have a homebuilt Pipistrel Sinus with a Rotax 912 UL that I flew to
Oshkosh and back last week. The panel has a dual Dynon Skyview display with
two-axis autopilot, plus radio and transponder. The total electrical load
with everything running is 7 to 8 amps. Occasionally it can go to 9 or 10
amps if I'm charging cell phone and iPad en route. I'm pretty confident
that I have the electrical system wired so that the ammeter is measuring
the total electrical load.
The alternator dropped out once on the outbound trip, but came back after
removing the iPad charging load. The symptom was a voltage drop from 13.8
volts to 12.5 volts, which seemed strange. On preflight the voltage may
read that high for a minute or so on a freshly-charged battery, but it
quickly drops to 12.2 or 12.1 volts. In flight, the voltage would drop to
12.5 volts and stay there for several minutes. I would think that if the
alternator had failed, I'd see the voltage drop to the same 12.1 volts that
I see on preflight, and keep dropping slowly. I can't see why it would
drop to 12.5 volts and stay there, unless the voltage regulator is failing
in a way that I'm not familiar with.
The alternator dropped out (same symptoms) a few times on the trip back,
but by reducing the load to 3 amps (one Skyview display, radio and
transponder), it stayed on line except for awhile when it seemed that the
mid-day sun shining on the dashboard was adding extra heat behind the
panel. That time we brought it back by directing cool air from a fresh air
vent forward toward the spot where the voltage regulator is mounted inside
the cabin on the back side of the firewall.
So the problem seems to be heat-related. Does this make sense? The Rotax
alternator is supposed to be rated for 18 amps, and able to handle a steady
load of 14 amps easily. Does the Ducati regulator have a thermal
self-protect cutout? Do I perhaps have a regulator that is ready to fail
completely, or should I just put an avionics cooling fan behind the panel
to get the air moving?Any other ideas?
Regards,
Paul Kuntz
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