Today's Message Index:
----------------------
1. 03:14 AM - Re: Electrical diagram (user9253)
2. 05:38 AM - Re: stopping engine (Eric M. Jones)
3. 07:43 AM - Mag switches in z13/8 (Jared Yates)
4. 08:01 AM - Re: Mag switches in z13/8 (Robert L. Nuckolls, III)
5. 08:28 AM - Re: Re: Electrical diagram (Robert L. Nuckolls, III)
6. 09:43 AM - Re: IVO Prop Current Limiter/Electronic Circuit Breaker (Glaeser, Dennis)
7. 05:31 PM - Re: Re: IVO Prop Current Limiter/Electronic Circuit Breaker (RGent1224@aol.com)
8. 06:45 PM - Re: Electrical diagram (marchudson)
Message 1
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| Subject: | Re: Electrical diagram |
Marc,
Your schematic is better than most type-certificated aircraft.
Having the start switch on the E-Bus is unusual. There is no advantage to having
it there because the engine will not start without the master contactor
being energized.
It is possible to leave the baggage light on and run the battery down.
I would consider putting the transponder and trim on the E-Bus. You could always
shut the transponder off if desired. The trim will not use power unless
the trim switch is pressed.
I assume that an EFIS will announce a low voltage condition. What about over-voltage
protection? Is that built into the alternator?
Joe
--------
Joe Gores
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=296274#296274
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| Subject: | Re: stopping engine |
In learning to fly in a C150/C172, the explanation was:
The fuel was gravity fed with a left-right- both selector (was there an OFF?),
the spark was magneto. In the event that the prop was turned by hand, the magneto
could start the engine if its P-lead to ground lead was defective. So throttle
at idle, mixture pulled lean until engine quit, switch off.
Your mileage may vary.
--------
Eric M. Jones
www.PerihelionDesign.com
113 Brentwood Drive
Southbridge, MA 01550
(508) 764-2072
emjones@charter.net
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=296286#296286
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| Subject: | Mag switches in z13/8 |
I'm planning to use z13/8 in an airplane with mags at first, and
perhaps electronic ignition later. Would it be ok to copy the mag
switch arangement in z11, which uses the 2-5 switches?
Message 4
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| Subject: | Re: Mag switches in z13/8 |
At 09:05 AM 4/30/2010, you wrote:
>
>I'm planning to use z13/8 in an airplane with mags at first, and
>perhaps electronic ignition later. Would it be ok to copy the mag
>switch arangement in z11, which uses the 2-5 switches?
Sure. The 2-5 switches can be wired to accommodate
about any combination of mags and/or electronic
ignition switches.
Bob . . .
Message 5
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| Subject: | Re: Electrical diagram |
At 05:11 AM 4/30/2010, you wrote:
>
>Marc,
> Your schematic is better than most type-certificated aircraft.
> Having the start switch on the E-Bus is unusual. There is no
> advantage to having it there because the engine will not start
> without the master contactor being energized.
> It is possible to leave the baggage light on and run the battery down.
> I would consider putting the transponder and trim on the
> E-Bus. You could always shut the transponder off if desired. The
> trim will not use power unless the trim switch is pressed.
> I assume that an EFIS will announce a low voltage
> condition. What about over-voltage protection? Is that built into
> the alternator?
I'll second Joe's observations/questions. Additionally,
I'm curious as to a perceived advantage for not combining
alternator and battery master control in a single switch?
Are you planning on using the pullable breaker as the
means by which power is removed from the bus in flight?
Bob . . .
Message 6
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| Subject: | Re: IVO Prop Current Limiter/Electronic Circuit Breaker |
Bob,
The reed switch circuit is already in place and operational, so my initial goal
has been achieved!
I already have the parts for the first design - only half assembled at the moment
(having to work for a living gets in the way of the 'important stuff' :-)
The latest design literally dummy-proofs the operation of the IVO, and will undoubtedly
increase the MTBF of the motor and gearbox by limiting the motor electrically
rather than mechanically jamming the gears!
I can follow your description on how it works, but my knowledge falls short of
being able to analyze and comment. When you declare the updated circuit complete,
I'll build it (already have most of the components :-) and let you know how
it works!
It was me who was doing the 'praying' for a solution! You did the 'perspiration'
part - per Thomas Edison.
Thanks,
Dennis
-----------------------------------
From: Robert L. Nuckolls, III
It took a bit more 'praying' than I anticipated
and I'm only 99.6% sure that my confidence in
having met design goals have been met. But I'll
invite other 'electron herders' on the List
to review the following and see if I've stubbed
my toe anywhere:
See:
http://aeroelectric.com/Pictures/Schematics/IVO-Prop_Pitch_Controller.pdf
------------------------------------
Message 7
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| Subject: | Re: IVO Prop Current Limiter/Electronic Circuit |
Breaker
Dennis
Do you have a circuit diagram/photos of your installation that you can
share??
Thanks
Dick
In a message dated 4/30/2010 11:44:48 A.M. Central Daylight Time,
dennis.glaeser@hp.com writes:
--> AeroElectric-List message posted by: "Glaeser, Dennis"
<dennis.glaeser@hp.com>
Bob,
The reed switch circuit is already in place and operational, so my initial
goal has been achieved!
I already have the parts for the first design - only half assembled at the
moment (having to work for a living gets in the way of the 'important
stuff' :-)
The latest design literally dummy-proofs the operation of the IVO, and
will undoubtedly increase the MTBF of the motor and gearbox by limiting the
motor electrically rather than mechanically jamming the gears!
I can follow your description on how it works, but my knowledge falls
short of being able to analyze and comment. When you declare the updated
circuit complete, I'll build it (already have most of the components :-) and let
you know how it works!
It was me who was doing the 'praying' for a solution! You did the
'perspiration' part - per Thomas Edison.
Thanks,
Dennis
-----------------------------------
From: Robert L. Nuckolls, III
It took a bit more 'praying' than I anticipated
and I'm only 99.6% sure that my confidence in
having met design goals have been met. But I'll
invite other 'electron herders' on the List
to review the following and see if I've stubbed
my toe anywhere:
See:
http://aeroelectric.com/Pictures/Schematics/IVO-Prop_Pitch_Controller.pdf
------------------------------------
Message 8
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| Subject: | Re: Electrical diagram |
Bob and Joe, I want to thank you for reviewing my diagram. I appreciate it.
Have the start button on the e-bus was an oversight. I will move it to the main
bus. Thanks for catching that.
Leaving the baggage light on was taken into consideration and I'm willing to take
the risk on this one. I'm sure after if bites me a couple of times, I'll reconsider.
Joe, good call on putting the transponder and trim on e-bus. I will probably do
this as the transponder consumes little power.
The EFIS does annunciate a low voltage condition and crowbar over voltage protection
is built into the Plane Power alternator.
Bob, to be honest, I went with the single battery switch for simplicity and cost.
Much cheaper to purchase the two position locking Honeywell toggle than the
three position. Also, my thoughts were that I'm probably not going to be shutting
off the alternator that often. If I really need to then yes, I'm going
to be using the breaker as a switch. I called Plane Power twice and made sure
that this alternator will run fine without the battery online, just in case
the battery inadvertently got shut off with the engine running.
Again guys, I really appreciate you having a look.
Marc
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=296343#296343
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