Today's Message Index:
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1. 12:14 AM - Z19RB Engine Battery Buss Question (ZuluZephyr)
2. 05:39 AM - Re: Z19RB Engine Battery Buss Question (Robert L. Nuckolls, III)
3. 10:17 AM - Re: Z19RB Engine Battery Buss Question (ZuluZephyr)
4. 06:56 PM - Re: Hobbs Meter (jerb)
5. 07:03 PM - Re: Hobbs Meter (jerb)
Message 1
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| Subject: | Z19RB Engine Battery Buss Question |
I am building a Sportsman with 2 batteries in the back behind a bulkhead (about
a 10 to 12 foot run to the firewall).
Z19 call for the always hot Engine Battery Buss (fuse block) to be within 6 inches
of the battery. This would mean bringing about 10 hot wires forward to the
panel from the buss.
What would be the downside of mounting the Engine Battery Buss (and Main Battery
Buss) near the panel and resizing the 2 hot wires from the battery to the buss
and adding an ANL fuse to protect the wire other than the addition of the fuse?
This would reduce the wire count for this run length.
Thanks,
Rocky
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=276125#276125
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| Subject: | Re: Z19RB Engine Battery Buss Question |
At 02:10 AM 12/4/2009, you wrote:
>
>I am building a Sportsman with 2 batteries in the back behind a
>bulkhead (about a 10 to 12 foot run to the firewall).
>
>Z19 call for the always hot Engine Battery Buss (fuse block) to be
>within 6 inches of the battery. This would mean bringing about 10
>hot wires forward to the panel from the buss.
That's a lot of items for a hot battery bus.
What systems make up the 10 loads and what
are their current requirements?
>What would be the downside of mounting the Engine Battery Buss (and
>Main Battery Buss) near the panel and resizing the 2 hot wires from
>the battery to the buss and adding an ANL fuse to protect the wire
>other than the addition of the fuse? This would reduce the wire
>count for this run length.
It's a crash-safety thing. We'd like for wires
that are always hot to be breakered at 5A or
less, fused at 7A or less. A battery buss feeder
to a remotely mounted battery would not fit
the design goals for contemporary TC aircraft.
Bob . . .
Message 3
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| Subject: | Re: Z19RB Engine Battery Buss Question |
The Engine and Main buss are basically duplicates with the following:
1. EFI 4a
2. ECU 1a
3. Pri Fuel Pump 7.5a
4. Sec Fuel Pump 7.5a (only one running except take off and landing)
5. Electric Constant Speed Prop 4.5a (9a peak)
Thanks,
Rocky
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=276195#276195
Message 4
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Hi Craig,
It's time to rally the troops. I recalling in one of the recent
(last couple years) aviation magazines of a vibration switch for use
with a hobbs meter for the purpose you have addressed. If I recall
it was around $12-$18. Any one recall seeing that. The Tiny Tach is
another alternative - you have to get the correct model depending
upon what engine type you have (single or double high voltage pulse
per rev. The are dual function, Tach and engine hour meter - attach
by wrapping a lead around the high voltage lead of one of the plugs.
If your using it for tracking hours for oil change, you should use
the tach hours if you have a recording tach, since that reflects
actual engine operation hours. The hobbs were added by rental
aircraft operators to base time for flight instruction. Second
function was for recording PIC time for log books.
jerb
At 11:40 AM 12/3/2009, you wrote:
><capav8r@gmail.com>
>
>I am interested in changing how the Hobbs meter in my plane is wired
>(it is currently wired to the radio master - not the best place for
>it) and don't want to install an oil pressure switch. I know I read
>in the EAA magazine many months back of alternative ways of doing
>so, but can't find the article.
>
>What other ways have been done? I think the writer of the EAA
>article used the field for the alternator.
>
>Any suggestions?
>
>Craig
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=276010#276010
>
>
Message 5
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Check this link out.
http://store.wagaero.com/product_info.php?products_id=12390
At 11:40 AM 12/3/2009, you wrote:
><capav8r@gmail.com>
>
>I am interested in changing how the Hobbs meter in my plane is wired
>(it is currently wired to the radio master - not the best place for
>it) and don't want to install an oil pressure switch. I know I read
>in the EAA magazine many months back of alternative ways of doing
>so, but can't find the article.
>
>What other ways have been done? I think the writer of the EAA
>article used the field for the alternator.
>
>Any suggestions?
>
>Craig
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=276010#276010
>
>
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