Today's Message Index:
----------------------
1. 03:40 AM - Re: Avionics Master (Charles Reiche)
2. 08:41 AM - Re: Avionics Master (6440 Auto Parts)
3. 07:45 PM - Re: Avionics Master (Noel Loveys)
Message 1
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| Subject: | Re: Avionics Master |
Some people will say "Oh but the switch will break!!!" or " what if the
relay fails" So here are two easy solutions...
1. Use two circuit breaker switches rated for 40 amps in parallel. if one
craps out, turn the other on.
2. hook up a heavy rated normally closed relay, so when you have the
avionics "off" you are actually powering the relay open and when you want to
turn the stuff on, you take power off the relay. When you turn the master
on, the avionics will get a little power until the relay powers open. This
is the way Beech has been doing it for a while.... also if your switch
fails, that breaks the power to the relay (wont open up) you can pull the
avionics power breaker to remove power to the relay , thus causing the
contacts to close and put power on the bus.
Some ideas
Charles Reiche
----- Original Message -----
From: "Greg Vouga" <gmvouga@hotmail.com>
Sent: Monday, May 14, 2007 10:28 PM
Subject: Avionics-List: Avionics Master
>
> All,
>
> I'm working on my panel and I'm trying to decide if I should put an
> Avionics Master switch. In my experience with rental planes this was nice
> to have since there was one switch to turn everything on or off during
> engine start or shutdown.
>
> Is there any reason not to add this feature? I'm planning an E-Bus and
> Main Bus configuration similar to the Z-13/8 design.
>
> Thanks
>
> _________________________________________________________________
> Make every IM count. Download Messenger and join the i'm Initiative now.
> It's free. http://im.live.com/messenger/im/home/?source=TAGHM_MAY07
>
>
>
Message 2
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| Subject: | Re: Avionics Master |
Another solution is to put each main device such as radio
xponder etc on a W31 breaker type switch. Kill 2 birds with one stone, each
needs their own fuse anyway. And if the design was for panel mount klixons
you would not be taking up any extra panel room.
Randy
----- Original Message -----
From: "Charles Reiche" <reichec@verizon.net>
Sent: Tuesday, May 15, 2007 5:37 AM
Subject: Re: Avionics-List: Avionics Master
> <reichec@verizon.net>
>
> Some people will say "Oh but the switch will break!!!" or " what if the
> relay fails" So here are two easy solutions...
>
> 1. Use two circuit breaker switches rated for 40 amps in parallel. if one
> craps out, turn the other on.
>
> 2. hook up a heavy rated normally closed relay, so when you have the
> avionics "off" you are actually powering the relay open and when you want
> to turn the stuff on, you take power off the relay. When you turn the
> master on, the avionics will get a little power until the relay powers
> open. This is the way Beech has been doing it for a while.... also if
> your switch fails, that breaks the power to the relay (wont open up) you
> can pull the avionics power breaker to remove power to the relay , thus
> causing the contacts to close and put power on the bus.
>
> Some ideas
>
> Charles Reiche
>
> ----- Original Message -----
> From: "Greg Vouga" <gmvouga@hotmail.com>
> To: <avionics-list@matronics.com>; <aeroelectric-list@matronics.com>
> Sent: Monday, May 14, 2007 10:28 PM
> Subject: Avionics-List: Avionics Master
>
>
>>
>> All,
>>
>> I'm working on my panel and I'm trying to decide if I should put an
>> Avionics Master switch. In my experience with rental planes this was
>> nice to have since there was one switch to turn everything on or off
>> during engine start or shutdown.
>>
>> Is there any reason not to add this feature? I'm planning an E-Bus and
>> Main Bus configuration similar to the Z-13/8 design.
>>
>> Thanks
>>
>> _________________________________________________________________
>> Make every IM count. Download Messenger and join the i'm Initiative now.
>> It's free. http://im.live.com/messenger/im/home/?source=TAGHM_MAY07
>>
>>
>>
>>
>>
>
>
>
Message 3
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It is also nice to be able to shut down avionics as a block in the case of a
short circuit and make troubleshooting a lot easier if all your avionics are
on a dedicated buss.
Noel
> -----Original Message-----
> From: owner-avionics-list-server@matronics.com
> [mailto:owner-avionics-list-server@matronics.com] On Behalf
> Of Greg Vouga
> Sent: Monday, May 14, 2007 11:58 PM
> To: avionics-list@matronics.com; aeroelectric-list@matronics.com
> Subject: Avionics-List: Avionics Master
>
>
> <gmvouga@hotmail.com>
>
> All,
>
> I'm working on my panel and I'm trying to decide if I should
> put an Avionics
> Master switch. In my experience with rental planes this was
> nice to have
> since there was one switch to turn everything on or off
> during engine start
> or shutdown.
>
> Is there any reason not to add this feature? I'm planning an
> E-Bus and Main
> Bus configuration similar to the Z-13/8 design.
>
> Thanks
>
> _________________________________________________________________
> Make every IM count. Download Messenger and join the i'm
> Initiative now.
> It's free. http://im.live.com/messenger/im/home/?source=TAGHM_MAY07
>
>
>
>
>
>
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