Today's Message Index:
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1. 11:44 AM - ov module (bob noffs)
2. 01:29 PM - Re: ov module (Robert L. Nuckolls, III)
3. 04:41 PM - Re: ov module (bob noffs)
4. 06:13 PM - Re: ov module (Robert L. Nuckolls, III)
5. 07:54 PM - Z-13 Alternator & Starter Wire Size (jonlaury)
6. 08:32 PM - Re: Z-13 Alternator & Starter Wire Size (Robert L. Nuckolls, III)
7. 09:25 PM - Re: PolyFiber silver coats and their effect on radio signals (Matthew Schumacher)
8. 10:30 PM - ICOM A 210 matched with a Flightcom 403 intercom (gordon)
Message 1
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hi bob,
i am labeling my panel and have a somewhat dumb question........what to
label the warning light that goes on if the ov s tripped? low voltage?
alternator off line?
i guess i am not sure what to label the 20 amp breaker in this system that
takes the alt. off line.
thanks, bob noffs
Message 2
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At 12:49 PM 6/22/2010, you wrote:
>hi bob,
> i am labeling my panel and have a somewhat dumb
> question........what to label the warning light that goes on if the
> ov s tripped? low voltage? alternator off line?
LO VOLTS
Doesn't matter why it's on, it can turn
on for a variety of reasons including an
ov trip.
> i guess i am not sure what to label the 20 amp breaker in this
> system that takes the alt. off line.
> thanks, bob noffs
?? 20A ??? which breaker is this ??
Is this the b-lead breaker for a PM alternator?
If so, label it
ALT
Bob . . .
Message 3
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yes bob, it is the breaker that the ov mod opens. thanks for the replys, bob
noffs
On Tue, Jun 22, 2010 at 3:30 PM, Robert L. Nuckolls, III <
nuckolls.bob@aeroelectric.com> wrote:
> nuckolls.bob@aeroelectric.com>
>
>
> At 12:49 PM 6/22/2010, you wrote:
>
>> hi bob,
>> i am labeling my panel and have a somewhat dumb question........what to
>> label the warning light that goes on if the ov s tripped? low voltage?
>> alternator off line?
>>
>
> LO VOLTS
>
> Doesn't matter why it's on, it can turn
> on for a variety of reasons including an
> ov trip.
>
>
> i guess i am not sure what to label the 20 amp breaker in this system that
>> takes the alt. off line.
>> thanks, bob noffs
>>
>
> ?? 20A ??? which breaker is this ??
>
> Is this the b-lead breaker for a PM alternator?
> If so, label it
>
> ALT
>
>
> Bob . . .
>
>
Message 4
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At 06:40 PM 6/22/2010, you wrote:
>yes bob, it is the breaker that the ov mod opens. thanks for the
>replys, bob noffs
I'm not sure what this breaker is. There are no AeroElectric
drawings that show a breaker greater than 5A associated with
a crowbar ov protection system.
Are you using a Z-figure? What kind of alternator.
Where is the breaker located in the system?
Bob . . .
Message 5
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Subject: | Z-13 Alternator & Starter Wire Size |
After looking at a copper wire resistance chart and playing with V=DIR, it seems
as if the 4AWG callout on Z-13 for the B lead is overkill for a 60 amp alternator
and even for the start circuit.
For the alternator, wouldn't 10AWG be sufficient for a 1' run to the starter contactor?
Voltage drop= 1' x 60a x .00118, or .07v
And could the 2'start circuit for my 1.5kw starter (125a @ 12v) be comfortable
with losing .12v using 6awg .12v=1' x 125a x .000465?
Just checking with you all to make sure that I'm not overlooking something in trying
to keep my plane on a diet.
John
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=302139#302139
Message 6
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Subject: | Re: Z-13 Alternator & Starter Wire Size |
At 09:53 PM 6/22/2010, you wrote:
>
>After looking at a copper wire resistance chart and playing with
>V=DIR, it seems as if the 4AWG callout on Z-13 for the B lead is
>overkill for a 60 amp alternator and even for the start circuit.
>
>For the alternator, wouldn't 10AWG be sufficient for a 1' run to
>the starter contactor? Voltage drop= 1' x 60a x .00118, or .07v
>
>And could the 2'start circuit for my 1.5kw starter (125a @ 12v) be
>comfortable with losing .12v using 6awg .12v=1' x 125a x .000465?
>
>Just checking with you all to make sure that I'm not overlooking
>something in trying to keep my plane on a diet.
Your doing just fine for a design goal that
has weight very high up on the list of priorities . . .
Having offered that, total weight savings is
pretty small. If I were building an airplane
where the battery, alternator and starter were
all within say 3 feet of each other, I'd wire
with 4AWG for all the fat wires and exploit
the single source of inexpensive wire.
Keep in mind too, temperature rise. THATS what
really limits the wire's current carrying
abilities . . .it's the insulation that dies
first, the copper is good for a whole lot more.
That 4AWG welding cable is pretty attractive.
For the few ounces of difference I'd probably
be better off cutting back a tad on the Big Macs.
But that's just me . . .
Bob . . .
Message 7
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Subject: | Re: PolyFiber silver coats and their effect on radio |
signals
On 06/05/2010 05:06 PM, James Kilford wrote:
>
> Gents,
>
> I had been wondering, for some time, what to do about the PolyFiber
> PolySpray coats. PolySpray is a metal-loaded paint that is used to
> protect PolyFiber fabric from UV damage.
>
> I'd wanted to put all the aerials inside my fuselage, but was
> concerned that the PolySpray would attenuate radio signals to/from
> COM, NAV, GPS (especially) and XPNDR. PolyFiber's own advice was to
> put the aerials outside the fuselage, and to definitely use the
> PolySpray coating, to ensure longevity of fabric (apparently the
> PolySpray increases the fabric's life 4-fold!).
>
> To cut a long story short, I decided to chance it -- with PolySpray
> and internal aerials -- and see what happened, figuring that I could
> move the aerials outside the fuselage if necessary.
>
> Today, I did tests to see if the aerials function as I would wish, and
> they did. The PolySpray coats appear to have made no difference to
> the signals -- even the presumably very small GPS signal. I don't
> have anything in the way of scientific instruments, just the signal
> strength shown on the GPS and hand-held radio, but using the
> fuselage-mounted aerials makes no discernible difference to the signal
> strength compared to the equipment's own aerials. I've yet to test
> the NAV / XPNDR aerials, but I assume the same will hold true for
> those too.
>
> FWIW!
>
> James
>
This is very interesting because a fellow in our RC airplane club
covered a model with polyspray and he couldn't get his airplane to pass
radio check and crashed two other models.
He tried both 72mhz and 2.4ghz radios, but gave up because it just
wasn't reliable. He went back to using plastic film.
schu
Message 8
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Subject: | ICOM A 210 matched with a Flightcom 403 intercom |
Several weeks ago you gave me some good info in that the ICOM A-210 and the Flight
Com 403 are compatable.
I have it installed and with much adjusting ect everything except volume adjustment
are fine.
I have called 2 times to Icom Tec and get no satisfaction. The way it is, You
can only have a volumn control is
to go into Menu..The first item that comes up is HP LEVEL which is headphone level.
This is the same as (Vol).
These are the 3 options I have.
AF gain: The output level is the same as (Vol).
Off (0) While muting the headphone.
01-80 Setting audio level from 1 to 80.
So according to ICOM Tec supportthey recommend (and I am already using this method)
is to put he Vol as high
as needed and then control it with the volume controls on my Lightspeed headsets.
If I try to use the normal Volume control like I normally would, just reach over
and adjust ., Nothing happens
The scale shows up on the front, you know it goes up and down as you turn the
knob but nothing happens.
So according to Icom that seems to be the only way it can be done unless I put
in audio panel.
I dont have the room and dont want to do it.
Have flown with it this way and the com works fine. Doesnt pick up the loud noise.
And am able to communicate fine.
The transceiver works fine also.
Its just the Idea that if you want more volume if I dont have enough thru the
headset controls, I have to go into menu and
dial in more.
Does any one have any suggestions or has anyone had this problem . Thanks
Gordon
[/list]
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tailwind10
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