Today's Message Index:
----------------------
1. 05:31 AM - Re: Re: Automatic way to turn On the Standby alternator (Robert L. Nuckolls, III)
2. 05:31 AM - Re: Re: Automatic way to turn On the Standby alternator (Robert L. Nuckolls, III)
3. 06:52 AM - Re: Re: Automatic way to turn On the Standby alternator (Carlos Trigo)
4. 07:14 AM - Re: Re: Automatic way to turn On the Standby alternator (John B)
5. 07:19 AM - Re: Re: Automatic way to turn On the Standby alternator (Rene)
6. 07:32 AM - Re: Re: Automatic way to turn On the Standby alternator (Charlie England)
7. 08:13 AM - Re: Collie Hat Switches (Christopher Cee Stone)
8. 09:23 AM - Re: Re: Automatic way to turn On the Standby alternator (Robert L. Nuckolls, III)
9. 10:11 AM - Re: Re: Automatic way to turn On the Standby alternator (Rick Beebe)
10. 10:33 AM - Re: Re: Automatic way to turn On the Standby alternator (Carlos Trigo)
Message 1
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| Subject: | Re: RE: Automatic way to turn On the Standby alternator |
>Since I've never designed an aircraft electrical system, much less
>built one, I'll leave it others to advise whether you should be able
>to turn both alternators off. Bob?
Smoke in the cockpit?
Bob . . .
Message 2
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| Subject: | Re: RE: Automatic way to turn On the Standby alternator |
At 08:43 PM 2/2/2016, you wrote:
>A mechanical failure in that single switch could take out both
>alternators. is that acceptable?
>
>Needing to turn both off would imply that both have failed 'shorted'
>and are trying to drain the battery. Not likely, but separate
>switches fix that, too.
Turning an alternator OFF only deprives it
of field excitation. A 'shorted' alternator
draining a battery has problems in the rectifier
assembly . . . your b-lead fault protection
is ten tasked with isolating the alterntor
from the battery.
Bob . . .
Message 3
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| Subject: | RE: Automatic way to turn On the Standby alternator |
Bob
I imply from your (very short) answer that I must be able to turn off both
alternators in flight, right?
Carlos
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Robert L
=2E
Nuckolls, III
Sent: quarta-feira, 3 de Fevereiro de 2016 13:27
Subject: Re: AeroElectric-List: RE: Automatic way to turn On the Standby
alternator
Since I've never designed an aircraft electrical system, much less built
one, I'll leave it others to advise whether you should be able to turn both
alternators off. Bob?
Smoke in the cockpit?
Bob . . .
---
Este e-mail foi verificado em termos de v=C3=ADrus pelo software antiv=C3
=ADrus Avast.
https://www.avast.com/antivirus
Message 4
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| Subject: | Re: RE: Automatic way to turn On the Standby alternator |
If one has two alternators in their electrical system, it makes sense to
have each alternator operated by a simple on-off switch. Operate it like
this; Leave alternator 1 on, until it fails, which will be immediately
indicated by a low voltage light and confirmed with a low voltage
indication. After it fails, turn it off, and then turn on alternator
number 2. Separation of the alternators will prevent, or at least
discourage, most cascading failures. This is a light airplane, and a
complex, automated system with load shed capability is not necessary. In
fact, it might not even be desirable. Remember that one must maintain and
repair this system in the future... Will the next technician understand
what has been created? How will any system diagnosis be done? Keep the
alternator systems separate and these future concerns will be easier to
deal with.
On Wed, Feb 3, 2016 at 7:51 AM, Carlos Trigo <trigo@mail.telepac.pt> wrote:
> Bob
>
>
> I imply from your (very short) answer that I must be able to turn off bot
h
> alternators in flight, right?
>
>
> Carlos
>
>
> *From:* owner-aeroelectric-list-server@matronics.com [mailto:
> owner-aeroelectric-list-server@matronics.com] *On Behalf Of *Robert L.
> Nuckolls, III
> *Sent:* quarta-feira, 3 de Fevereiro de 2016 13:27
> *To:* aeroelectric-list@matronics.com
> *Subject:* Re: AeroElectric-List: RE: Automatic way to turn On the
> Standby alternator
>
>
> Since I've never designed an aircraft electrical system, much less built
> one, I'll leave it others to advise whether you should be able to turn bo
th
> alternators off. Bob?
>
>
> Smoke in the cockpit?
>
>
> Bob . . .
> Este e-mail foi enviado a partir de um computador sem v=C3=ADrus protegid
o pela
> Avast.
> www.avast.com
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm
_campaign=sig-email&utm_content=emailclient>
>
Message 5
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| Subject: | RE: Automatic way to turn On the Standby alternator |
I would say yes. Most A/C have a master switch of some kind so that all
power can be removed. Depending on how you wire it..the master
switch may or may not do the job.
I elected to have separate switches to control the Alternators. I can
run them at the same time, but my backup is set lower so I am guessing
it would never contribute as long as the primary was working. I also
have extra battery power..I really do not need an alternator to
finish any reasonable flight. With a little load shedding I am good for
2-3 hours. Unless I lose my alternator on take off at night.I
am all set for any flight I take.
BTW, I have tested this in real conditions twice and it works fine. I
changed my alternator to a 70 amp version but did not change the
breaker. I don=99t know how because I do not have 70 amps worth
of load, but the 60 amp break tripped twice on a long cross country when
I transmitted shortly after takeoff. No problems since I upgraded the
breaker. Both flights were completed on the backup battery with the
main battery being used as a reserve. (main battery is a 925 and backup
is a 680) I have an 8 amp backup alternator which does not keep up with
basic loadbut extends the flight time way past the
fuel limit.
Rene'
801-721-6080
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
Carlos Trigo
Sent: Wednesday, February 03, 2016 7:51 AM
Subject: RE: AeroElectric-List: RE: Automatic way to turn On the Standby
alternator
Bob
I imply from your (very short) answer that I must be able to turn off
both alternators in flight, right?
Carlos
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of
Robert L. Nuckolls, III
Sent: quarta-feira, 3 de Fevereiro de 2016 13:27
Subject: Re: AeroElectric-List: RE: Automatic way to turn On the Standby
alternator
Since I've never designed an aircraft electrical system, much less built
one, I'll leave it others to advise whether you should be able to turn
both alternators off. Bob?
Smoke in the cockpit?
Bob . . .
Este e-mail foi enviado a partir de um computador sem v=C3=ADrus
protegido pela Avast.
<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm
_campaign=sig-email&utm_content=emailclient> www.avast.com
Message 6
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| Subject: | Re: RE: Automatic way to turn On the Standby alternator |
Rene', if your battery is a bit down from sitting a while, then
starting, the alt might well try to supply its full rated amps when
engine rpm comes up enough to power it to full output. 60A breaker on
70A alternator, done....
On 2/3/2016 9:18 AM, Rene wrote:
>
> I would say yes. Most A/C have a master switch of some kind so that
> all power can be removed. Depending on how you wire it..the master
> switch may or may not do the job.
>
> I elected to have separate switches to control the Alternators. I can
> run them at the same time, but my backup is set lower so I am guessing
> it would never contribute as long as the primary was working. I also
> have extra battery power..I really do not need an alternator to
> finish any reasonable flight. With a little load shedding I am good
> for 2-3 hours. Unless I lose my alternator on take off at night.I am
> all set for any flight I take.
>
> BTW, I have tested this in real conditions twice and it works fine. I
> changed my alternator to a 70 amp version but did not change the
> breaker. I dont know how because I do not have 70 amps worth of
> load, but the 60 amp break tripped twice on a long cross country when
> I transmitted shortly after takeoff. No problems since I upgraded the
> breaker. Both flights were completed on the backup battery with the
> main battery being used as a reserve. (main battery is a 925 and
> backup is a 680) I have an 8 amp backup alternator which does not
> keep up with basic loadbut extends the flight time way past the fuel
> limit.
>
> Rene'
>
> 801-721-6080
>
> *From:*owner-aeroelectric-list-server@matronics.com
> [mailto:owner-aeroelectric-list-server@matronics.com] *On Behalf Of
> *Carlos Trigo
> *Sent:* Wednesday, February 03, 2016 7:51 AM
> *To:* aeroelectric-list@matronics.com
> *Subject:* RE: AeroElectric-List: RE: Automatic way to turn On the
> Standby alternator
>
> Bob
>
> I imply from your (very short) answer that I must be able to turn off
> both alternators in flight, right?
>
> Carlos
>
> *From:*owner-aeroelectric-list-server@matronics.com
> <mailto:owner-aeroelectric-list-server@matronics.com>
> [mailto:owner-aeroelectric-list-server@matronics.com] *On Behalf Of
> *Robert L. Nuckolls, III
> *Sent:* quarta-feira, 3 de Fevereiro de 2016 13:27
> *To:* aeroelectric-list@matronics.com
> <mailto:aeroelectric-list@matronics.com>
> *Subject:* Re: AeroElectric-List: RE: Automatic way to turn On the
> Standby alternator
>
> Since I've never designed an aircraft electrical system, much less
> built one, I'll leave it others to advise whether you should be
> able to turn both alternators off. Bob?
>
>
> Smoke in the cockpit?
>
>
> Bob . . .
>
> Este e-mail foi enviado a partir de um computador sem vrus protegido
> pela Avast.
> www.avast.com
> <https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient>
>
>
Message 7
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| Subject: | Re: Collie Hat Switches |
Otto switch has many to chose from. Aerospace quality... aerospace price
too!
http://www.ottoexcellence.com/products/4-way-mini-trim/
-Chris Stone
RV-8 80802
On Tue, Feb 2, 2016 at 1:26 AM, Werner Schneider <glastar@gmx.net> wrote:
> I would like to pull the lists wisdom and knowledge.
>
> My dad creates the stick grips out of cherry wood (I have already a pair
> in my Glastar (don't put the mic key on top!)),
>
> now for the RV10 you have 2 electric trims, one version would be two
> switches in the panel, but I like to sit in flying position to trim, so a
> collie hat would be the ideal scenario for me.
>
> What is the list experience (this will be low amps as no direct drive)
> with that kind of switches? Any sources for it (found some from Digikey).
>
> Many thanks for your ideas, hints, tips coming....
>
> Cheers Werner
>
Message 8
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| Subject: | RE: Automatic way to turn On the Standby alternator |
At 08:51 AM 2/3/2016, you wrote:
>Bob
>
>I imply from your (very short) answer that I must be able to turn
>off both alternators in flight, right?
Your choice. The probability is rare but
not zero. In a TC aircraft, ABSOLUTE control
over all ship's power sources is a
requirement.
Bob . . .
Message 9
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| Subject: | Re: RE: Automatic way to turn On the Standby alternator |
Two weeks ago I had the beginnings of an electrical fire in the cockpit
so turning off ALL sources of power to the panel is a very important
safety feature to me.
A pin in a nylon connector (AMP Mate N Lock connector) came loose and
overheated melting the connector and releasing a cloud of smoke. I hit
the master and it stopped. To be fair I later discovered the breaker had
also popped but if it hadn't I could have had a really really bad situation.
--Rick
On 02/03/2016 12:21 PM, Robert L. Nuckolls, III wrote:
> At 08:51 AM 2/3/2016, you wrote:
>> Bob
>>
>> I imply from your (very short) answer that I must be able to turn off
>> both alternators in flight, right?
>
> Your choice. The probability is rare but
> not zero. In a TC aircraft, ABSOLUTE control
> over all ship's power sources is a
> requirement.
>
> Bob . . .
Message 10
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| Subject: | Re: RE: Automatic way to turn On the Standby alternator |
Ok, ok, don't shoot!
I will put 2 separate switches...
Thanks to all
Carlos
Enviado do meu iPhone
No dia 03/02/2016, s 18:09, Rick Beebe <richard.beebe@yale.edu> escreveu:
>
> Two weeks ago I had the beginnings of an electrical fire in the cockpit so turning
off ALL sources of power to the panel is a very important safety feature
to me.
>
> A pin in a nylon connector (AMP Mate N Lock connector) came loose and overheated
melting the connector and releasing a cloud of smoke. I hit the master and
it stopped. To be fair I later discovered the breaker had also popped but if
it hadn't I could have had a really really bad situation.
>
> --Rick
>
>> On 02/03/2016 12:21 PM, Robert L. Nuckolls, III wrote:
>> At 08:51 AM 2/3/2016, you wrote:
>>> Bob
>>>
>>> I imply from your (very short) answer that I must be able to turn off
>>> both alternators in flight, right?
>>
>> Your choice. The probability is rare but
>> not zero. In a TC aircraft, ABSOLUTE control
>> over all ship's power sources is a
>> requirement.
>>
>> Bob . . .
>
>
>
>
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