Today's Message Index:
----------------------
1. 09:07 AM - Re: TurboCAD format files (jayb)
2. 04:35 PM - Z-19 and multiple busses (Corey Crawford)
3. 05:33 PM - Re: Re: TurboCAD format files (Robert L. Nuckolls, III)
4. 05:35 PM - Re: Z-19 and multiple busses (Robert L. Nuckolls, III)
5. 06:12 PM - Re: Z-19 and multiple busses (Corey Crawford)
6. 06:28 PM - Dynon d-180 audio alarm output to King aux audio in (Vince-Himsl)
7. 08:04 PM - Re: Z-19 and multiple busses (Robert L. Nuckolls, III)
8. 08:04 PM - Re: Dynon d-180 audio alarm output to King aux audio in (Robert L. Nuckolls, III)
Message 1
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Subject: | Re: TurboCAD format files |
Using v14.2, this scenario was very repeatable on my WinXP machine. Open up the
seminar.dwg from AEC11.
Make a change, save (as .dwg format) and then close the file. Do this until the
file gets to be ~1.5MB. At this point, opening the .dwg file takes longer and
longer. Sometimes the file opens after a really long time, but usually the program
just hangs forever. Now your data is "gone" and the file is corrupted...
Look at the running application when this happens using Task Mgr. You will see
that TurboCAD consumed memory size just keeps growing and growing as there's
a memory leak. More annoying is the occasional program faults seen during cut+paste
or save operations.
TurboCAD support confirmed the above as a known bug when using .dwg AutoCAD formatted
files. The fix is only available in v15 - you get to buy it again (not!).
No issues where seen doing the above steps after saving the AutoCAD format seminar.dwg
file as a TurboCAD format .tcw file.
Jay
do not archive
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=164807#164807
Message 2
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Subject: | Z-19 and multiple busses |
Hello,
I'm looking to use the Z-19 drawings to create the electrical system to
power my electrically-dependent Subaru engine and had a question:
Is there a reason I shouldn't go with a single engine bus that's fed by both
batteries, with diodes to prevent a bad battery from sucking in all the
juice?
The Z-19's show one bus per battery and then using a diode bridge for each
component - this would move the diodes between the battery and the bus,
instead of being placed between the bus(ses) and the individual components.
Comments?
--
Corey Crawford
Message 3
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Subject: | Re: TurboCAD format files |
At 09:01 AM 2/18/2008 -0800, you wrote:
>
>Using v14.2, this scenario was very repeatable on my WinXP machine. Open
>up the seminar.dwg from AEC11.
>
>Make a change, save (as .dwg format) and then close the file. Do this
>until the file gets to be ~1.5MB. At this point, opening the .dwg file
>takes longer and longer. Sometimes the file opens after a really long
>time, but usually the program just hangs forever. Now your data is "gone"
>and the file is corrupted... Look at the running application when this
>happens using Task Mgr. You will see that TurboCAD consumed memory size
>just keeps growing and growing as there's a memory leak. More annoying is
>the occasional program faults seen during cut+paste or save operations.
>
>TurboCAD support confirmed the above as a known bug when using .dwg
>AutoCAD formatted files. The fix is only available in v15 - you get to buy
>it again (not!).
>
>No issues where seen doing the above steps after saving the AutoCAD format
>seminar.dwg file as a TurboCAD format .tcw file.
Don't save as .dwg
If TurboCAD is your vehicle of choice, there's
no value in causing it to open work product in
one language, interpret its native language for
editing and then converting back to the source
language for storage.
Use the .dwg files as a one-time source and
let TurboCAD do what it does best after that.
Bob . . .
Message 4
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Subject: | Re: Z-19 and multiple busses |
At 05:26 PM 2/18/2008 -0700, you wrote:
>Hello,
>
>I'm looking to use the Z-19 drawings to create the electrical system to
>power my electrically-dependent Subaru engine and had a question:
>
>Is there a reason I shouldn't go with a single engine bus that's fed by
>both batteries, with diodes to prevent a bad battery from sucking in all
>the juice?
Batteries don't go bad in ways that "suck juice".
I presume that since your airplane is decidedly
dependent on 100.0% availability of power, you'll
not only use modern, RG batteries . . . you'll make
at least some effort to see that they're discarded
for lack of capacity . . . which will happen long
before they don't crank the engine.
>The Z-19's show one bus per battery and then using a diode bridge for each
>component - this would move the diodes between the battery and the bus,
>instead of being placed between the bus(ses) and the individual components.
The dual diodes are intended to isolate a battery
with higher state of charge from being tapped by
the equipment that has reduced the other battery
to a lower state of charge. It's not batteries that
are the energy thieves . . . it's stuff you have
turned on.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 5
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Subject: | Re: Z-19 and multiple busses |
On Feb 18, 2008 6:32 PM, Robert L. Nuckolls, III <nuckolls.bob@cox.net>
wrote:
> The dual diodes are intended to isolate a battery
> with higher state of charge from being tapped by
> the equipment that has reduced the other battery
> to a lower state of charge. It's not batteries that
> are the energy thieves . . . it's stuff you have
> turned on.
>
I think I got it .. the diodes prevent the Main Battery from being used by
components on the Engine Bus and vise versa. If the two busses would feed
the exact same components, is there any reason to separate them? The only
thing I'd lose is not being able to isolate a battery, or am I missing
something? (I'm not sure being able to isolate a single battery is very
helpful in this scenario - the whole engine can be isolated with the dc
power switch if needed).
Thanks! :)
--
Corey Crawford
Message 6
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Subject: | Dynon d-180 audio alarm output to King aux audio in |
Hello,
I have a King KY96A comm/receiver and a Dynon D-180.
The Dynon has two audio alarm out wires that I tie together and feed to a
10kohm pot. The center tap is in turn fed to an 'intercom' which I don't
have.
But I have noticed that on the schematic for the King KY96a there are three
'aux audio in' connection inputs.
Can one just connect the dynon alarm inputs (via the pot) to one of these?
Or more to the point, does anyone know exactly what those 'aux audio in'
inputs do?
Thanks,
Vince H.
RV8-wiring
Message 7
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Subject: | Re: Z-19 and multiple busses |
At 07:09 PM 2/18/2008 -0700, you wrote:
>On Feb 18, 2008 6:32 PM, Robert L. Nuckolls, III
><<mailto:nuckolls.bob@cox.net>nuckolls.bob@cox.net> wrote:
>> The dual diodes are intended to isolate a battery
>> with higher state of charge from being tapped by
>> the equipment that has reduced the other battery
>> to a lower state of charge. It's not batteries that
>> are the energy thieves . . . it's stuff you have
>> turned on.
>
>I think I got it .. the diodes prevent the Main Battery from being used by
>components on the Engine Bus and vise versa. If the two busses would feed
>the exact same components, is there any reason to separate them? The only
>thing I'd lose is not being able to isolate a battery, or am I missing
>something? (I'm not sure being able to isolate a single battery is very
>helpful in this scenario - the whole engine can be isolated with the dc
>power switch if needed).
I'm not sure about your desire to "isolate a
battery". When the alternator quits, the
energy available is finite and contained totally
within the battery(ies).
When the low volts warning light comes on, wiring
per Z-19 requires no action on the part of the
pilot except to close the endurance bus alternate
feed switch and open both battery master switches.
Then make preparations for a no-alternator
en-route phase of flight followed by approach to
comfortable landing. Once your comfortable landing
is assured (short final over the numbers) close
the master relays and run as much "stuff" as you
like to complete the flight.
Normal operations are with the primary engine
power switch ON and the secondary switch off.
Assuming you've done your homework and have
a considered preventative maintenance program
for batteries, then you KNOW how long you
can operate battery only in the endurance
mode. If you have not done your homework and
find that the engine is not running well for
as long as you anticipated, you may have
to close the secondary power switch to allow
the main battery to support the engine. If
the engine battery's lack of capacity proves
to be a surprise, then the main battery's true
condition is probably a mystery too . . . it's
time to call it an emergency.
The design goal is to minimize in-flight
diagnostics, switch flipping and other
distractions that prevent you from doing
your best as a pilot. With a modicum of
planning it's a no-sweat deal.
Bob . . .
----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------
Message 8
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Subject: | Re: Dynon d-180 audio alarm output to King aux audio |
in
At 06:24 PM 2/18/2008 -0800, you wrote:
>
>Hello,
>I have a King KY96A comm/receiver and a Dynon D-180.
>
>The Dynon has two audio alarm out wires that I tie together and feed to a
>10kohm pot. The center tap is in turn fed to an 'intercom' which I don't
>have.
>
>But I have noticed that on the schematic for the King KY96a there are three
>'aux audio in' connection inputs.
>
>Can one just connect the dynon alarm inputs (via the pot) to one of these?
>
>Or more to the point, does anyone know exactly what those 'aux audio in'
>inputs do?
Just what you want. Run your alarm tones to these inputs
through gain control potentiometers.
Bob . . .
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