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Z-11 Main Battery Bus

 
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AlRice



Joined: 27 Sep 2007
Posts: 30
Location: Boca Raton, FL

PostPosted: Thu Jan 17, 2008 1:36 pm    Post subject: Z-11 Main Battery Bus Reply with quote

Bob:
On diagrams Z-11 and Z-13 I notice that you have the Hobbs meter powered off the main battery bus which is on all the time. Shouldn't the Hobbs come off the main power bus instead?


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nuckolls.bob(at)cox.net
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PostPosted: Thu Jan 17, 2008 7:12 pm    Post subject: Z-11 Main Battery Bus Reply with quote

At 01:36 PM 1/17/2008 -0800, you wrote:

Quote:


Bob:
On diagrams Z-11 and Z-13 I notice that you have the Hobbs meter powered
off the main battery bus which is on all the time. Shouldn't the Hobbs
come off the main power bus instead?

A Hobbs may be POWERED by the battery bus (as it is
in virtually ALL Cessna single engine aircraft) it is
CONTROLLED by an oil pressure switch so that it records
engine run time, not bus hot time.

See:

http://www.aeroelectric.com/PPS/Engine/Oil_Pressure/Oil_P_Warn.pdf
Bob . . .


Quote:
--------
Al Rice
Skybolt 260


Read this topic online here:

http://forums.matronics.com/viewtopic.php?p=158861#158861


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Bob . . .

----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------


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BobsV35B(at)aol.com
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PostPosted: Thu Jan 17, 2008 7:44 pm    Post subject: Z-11 Main Battery Bus Reply with quote

Good Evening Al Rice,

For What It Is Worth!

It is done that way to make it more difficult for the thieves who would turn the Master Switch off in an effort to cheat the FBO!

Happy Skies,

Old Bob
AKA
Bob Siegfried
Ancient Aviator
628 West 86th Street
Downers Grove, IL 60516
630 985-8502
Stearman N3977A
Brookeridge Air Park LL22

In a message dated 1/17/2008 9:14:15 P.M. Central Standard Time, nuckolls.bob(at)cox.net writes:
Quote:
A Hobbs may be POWERED by the battery bus (as it is
in virtually ALL Cessna single engine aircraft) it is
CONTROLLED by an oil pressure switch so that it records
engine run time, not bus hot time.

See:

http://www.aeroelectric.com/PPS/Engine/Oil_Pressure/Oil_P_Warn.pdf
Bob . . .




Start the year off right. Easy ways to stay in shape in the new year.


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mprather(at)spro.net
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PostPosted: Thu Jan 17, 2008 7:48 pm    Post subject: Z-11 Main Battery Bus Reply with quote

Keeps the FBO's renting out airplanes in business... Smile
Matt-

Quote:

<nuckolls.bob(at)cox.net>

At 01:36 PM 1/17/2008 -0800, you wrote:

>
>
>Bob:
>On diagrams Z-11 and Z-13 I notice that you have the Hobbs meter powered
>off the main battery bus which is on all the time. Shouldn't the Hobbs
>come off the main power bus instead?

A Hobbs may be POWERED by the battery bus (as it is
in virtually ALL Cessna single engine aircraft) it is
CONTROLLED by an oil pressure switch so that it records
engine run time, not bus hot time.

See:

http://www.aeroelectric.com/PPS/Engine/Oil_Pressure/Oil_P_Warn.pdf
Bob . . .


>--------
>Al Rice
>Skybolt 260
>
>
>Read this topic online here:
>
>http://forums.matronics.com/viewtopic.php?p=158861#158861
>
>
>--
>9:01 AM
>incoming mail is certified Virus Free.
>Checked by AVG.
Bob . . .

----------------------------------------)
( . . . a long habit of not thinking )
( a thing wrong, gives it a superficial )
( appearance of being right . . . )
( )
( -Thomas Paine 1776- )
----------------------------------------



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AlRice



Joined: 27 Sep 2007
Posts: 30
Location: Boca Raton, FL

PostPosted: Thu Jan 17, 2008 8:52 pm    Post subject: Re: Z-11 Main Battery Bus Reply with quote

I didn't know that. Thanks for the clarification.

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