Today's Message Index:
----------------------
1. 07:43 AM - Re: Re: Sequence for bringing alternators on line. (Robert L. Nuckolls, III)
2. 07:55 AM - Re: Re: Sequence for bringing alternators on line. (John Tipton)
3. 08:47 AM - Re: Re: Sequence for bringing alternators on line. (Sebastien)
4. 09:30 AM - Re: Z-13/8 Failure Question (BMC_Dave)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Sequence for bringing alternators on line. |
At 01:23 PM 7/7/2018, you wrote:
>Oh,=C2 Sebastien:
>
>Human nature being what it is...=C2 There have
>been MANY a Power Loss issue by pilots starting
>on Just the Master and Forgetting to turn the Alternator ON.
>Really reeks hell on the radio and especially
>with planes with electrical re-tracts.
If an airplane were fitted with but one
annunciation of electrical system condition,
I'd go for the low voltage warning light.
Like the battery ammeter of old, it's
one device that gives you the most
information about system condition
in a single instrument . . . albeit
a bit tricky to interpret for some
conditions . . . also easy to ignore.
A single, flashing light that operates
below 13.0 volts is the modern and
more attention getting alternative.
Bob . . .
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Sequence for bringing alternators on line. |
For those of you who have the 'PlanePower' (internally regulated, externally
controlled) alternator (likes RVs) have the option of fitting the optional '
Alternator out' light, indicating no alternator output or alternator 'F' lea
d switch not closed.
John
Sent from my iPad
----x--O--x----
> On 8 Jul 2018, at 3:42 pm, Robert L. Nuckolls, III <nuckolls.bob@aeroelect
ric.com> wrote:
>
> At 01:23 PM 7/7/2018, you wrote:
>> Oh,=C3=82 Sebastien:
>>
>> Human nature being what it is...=C3=82 There have been MANY a Power Loss
issue by pilots starting on Just the Master and Forgetting to turn the Alte
rnator ON.
>> Really reeks hell on the radio and especially with planes with electrical
re-tracts.
>
> If an airplane were fitted with but one
> annunciation of electrical system condition,
> I'd go for the low voltage warning light.
> Like the battery ammeter of old, it's
> one device that gives you the most
> information about system condition
> in a single instrument . . . albeit
> a bit tricky to interpret for some
> conditions . . . also easy to ignore.
>
> A single, flashing light that operates
> below 13.0 volts is the modern and
> more attention getting alternative.
>
>
==========================
==========================
==========================
==========================
==========================
==========================
======================
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Sequence for bringing alternators on line. |
In this case, forgetting would be pretty impossible. Dynon Skyview system
with audio warnings and Bob's light. I'd have to forget to turn it on, skip
the checklist item to check voltage, fail to see the Dynon low voltage
warning, and ignore the light. A pilot that could manage that has bigger
problems than a dead battery.
Is this normal behaviour for all alternators or just internally regulated
ones or otherwise alternator specific. It's the first time I've noticed a
big draw from having the alternator on with the engine off.
On Sun, Jul 8, 2018, 7:49 AM Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> At 01:23 PM 7/7/2018, you wrote:
>
> Oh,=C3=82 Sebastien:
>
> Human nature being what it is...=C3=82 There have been MANY a Power Loss
issue
> by pilots starting on Just the Master and Forgetting to turn the Alternat
or
> ON.
> Really reeks hell on the radio and especially with planes with electrical
> re-tracts.
>
>
> If an airplane were fitted with but one
> annunciation of electrical system condition,
> I'd go for the low voltage warning light.
> Like the battery ammeter of old, it's
> one device that gives you the most
> information about system condition
> in a single instrument . . . albeit
> a bit tricky to interpret for some
> conditions . . . also easy to ignore.
>
> A single, flashing light that operates
> below 13.0 volts is the modern and
> more attention getting alternative.
>
>
> Bob . . .
>
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Z-13/8 Failure Question |
nuckolls.bob(at)aeroelect wrote:
> At 05:01 PM 7/6/2018, you wrote:
>
> >
> > Been pouring through the forums recently, lots of great info and I've been
able to answer most of my own questions so far. I'm curious about a particular
failure since I'm designing for a SDS EI/EFI plane, perhaps I don't fully understand
how the LR-3 module works.
>
> The LR3C alternator controller is an adjustable
> linear regulator combined with crowbar over voltage
> protection and low voltage warning.
>
>
>
> > In Z-13/8 if the battery contactor fails, exceedingly rare and probably with
some warning prior to being critical, is there any notification that such a
failure has occurred? Any indication the battery has been disconnected from the
main ALT?
>
> No. You probably won't be aware of a battery contactor
> failure until you're on the ground and just happen
> to shut alternator(s) down first . . . or attempt
> a preflight for your next sortie.
>
>
>
> > I'll be switching the ECU and injectors off the main battery bus. So if what
I'm thinking is true I won't get any indication I'm running the engine only
off battery power until it stops. An unappealing prospect...
>
> Add lv warning to the battery bus . . .
>
> https://goo.gl/sNBCja
>
> You would hook such a gizmo to the downstream
> side of one of the engine accessory switches
> such that the lv warn gets powered down with
> the engine.
>
>
> > Also, looking at the reference figures online are these Z-figures the most
recent? I ask because it seems the wiring for the main ALT in Z-13 doesn't include
the LR-3 module, I have to look at Z-12 for that. Not hard to modify for
the combined module, just wondering if there is a Z-13 version out there that
includes this. Thanks!
>
> The Z figures are ARCHITECTURE drawings, not wire books
> nor are they intended to drive decisions for selection of specific
> components. One might use any combination of ov/lv/regulator
> in lieu of the LR3 and vise-versa.
>
> Battery contactor failure in flight is exceedingly rare.
> They nearly always annunciate impending failure during
> an engine start. But be attentive to the FIRST signs
> of fussiness . . . I had a renter on 1K1 that would
> go rap on his Cherokee battery contactor with the handle
> of a screwdriver with the master switch ON . . . seems
> that this shade tree mechanic's move gave him better
> starts. We moved off the airport before the contactor
> went TU so I don't know how long the work-around serviced
> his intentions to go flying.
>
> Contactors I've replaced had been in service years . . .
> sometimes decades. Teardown inspections showed that
> the devices were pretty beat up. Whisky barrel contactors
> are best mounted cap down . . . with a small vent/drain
> hole added to the hi-point of the cap.
>
> Works good . . . lasts a long time . . .
>
>
>
> Bob . . .
Awesome, that about covers my concerns. Thanks!
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=481493#481493
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|