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n76lima(at)mindspring.com
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 Posted: Tue Sep 25, 2012 7:16 am Post subject: Melted wire -- emergency bypass of the Master Solenoid? |
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| Quote: | Simpler than that. Just mount a fuse close to the battery that is
sized to protect the wire you are running through the firewall to
the breaker switch, which is sized to open BEFORE the fuse
blows. Run the wire through fire sleeve or even through aluminum
tubing attached to a bulkhead fitting in the firewall. The only
wire that is unprotected would be the very short wire from the fuse
to the battery or battery buss bar. The essential items can be
supplied from a separate buss which can be fed from the normal buss
through a diode. Check out Bob Nuckols
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I've seen Nuckolls' planning, and just have to wonder how complex one
wishes to make what should be simple airplanes.
If the stock bus is ~60A, and you want to run those radios, lights,
fuel pump, etc., you are talking a pretty big fuse, which means a lot
of arcing before it blows.
My initial reply was sort of tongue in cheek, pointing out the
extreme measures needed to provide a backup for loss of electrons due
to failed Master Solenoid circuit.
A handheld Com and a battery backed up portable GPS should suffice
for most flights, with the standard flashlight we all carry...
--Bob Steward
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beltz6
Joined: 31 May 2008
Posts: 10
Location: Goleta, CA
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| Posted: Tue Sep 25, 2012 8:38 am Post subject: Re: Melted wire -- emergency bypass of the Master Solenoi |
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| n76lima(at)mindspring.com wrote: |
My initial reply was sort of tongue in cheek, pointing out the
extreme measures needed to provide a backup for loss of electrons due
to failed Master Solenoid circuit.
A handheld Com and a battery backed up portable GPS should suffice
for most flights, with the standard flashlight we all carry...
--Bob Steward |
I rarely fly at night these days. But this is a good reminder to make sure the batteries in my GPS and handheld radio are fresh, and to check whether the former actually useably transmits and receives from the cockpit environment.
Still, it would SUCK bigtime to have such a failure while on an ILS (which one has to do from time to time at my home airport).
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teamgrumman(at)yahoo.com
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| Posted: Tue Sep 25, 2012 10:32 am Post subject: Melted wire -- emergency bypass of the Master Solenoid? |
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a panel mounted Garmin 796 with its own battery would work too. includes a standard 6-pack.
From: Bob Steward <n76lima(at)mindspring.com>
To: teamgrumman-list(at)matronics.com
Sent: Tuesday, September 25, 2012 8:16 AM
Subject: Re: Re: Melted wire -- emergency bypass of the Master Solenoid?
--> TeamGrumman-List message posted by: Bob Steward <n76lima(at)mindspring.com (n76lima(at)mindspring.com)>
| Quote: | Simpler than that. Just mount a fuse close to the battery that is sized to protect the wire you are running through the firewall to the breaker switch, which is sized to open BEFORE the fuse blows. Run the wire through fire sleeve or even through aluminum tubing attached to a bulkhead fitting in the firewall. The only wire that is unprotected would be the very short wire from the fuse to the battery or battery buss bar. The essential items can be supplied from a separate buss which can be fed from the normal buss through a diode. Check out Bob Nuckols
|
I've seen Nuckolls' planning, and just have to wonder how complex one wishes to make what should be simple airplanes.
If the stock bus is ~60A, and you want to run those radios, lights, fuel pump, etc., you are talking a pretty big fuse, which means a lot of arcing before it blows.
My initial reply was sort of tongue in cheek, pointing out the extreme measures needed to provide a backup for loss of electrons due to failed Master Solenoid circuit.
A handheld Com and a battery backed up portable GPS should suffice for most flights, wisp; -================
[quote][b]
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