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armywrights(at)adelphia.n
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 Posted: Sat Jun 10, 2006 7:05 pm Post subject: CB's |
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I know about circuit breaker/switches that have the amperage stamped in the ball on the end of the switch. I heard today about switches that have a push-pull CB mounted below the switch in the same housing. Anyone have a reference for these so I can research? For the few CB’s that Bob recommends, why would I want a separate CB and switch (whether in the same housing or not) when I can get the switch/CB in one smaller package? I know there’s a price difference.
Rob Wright
RV-10 Wings
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nuckollsr(at)cox.net
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| Posted: Mon Jun 12, 2006 3:56 am Post subject: CB's |
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At 09:59 PM 6/10/2006 -0500, you wrote:
| Quote: | I know about circuit breaker/switches that have the amperage stamped in
the ball on the end of the switch. I heard today about switches that have
a push-pull CB mounted below the switch in the same housing. Anyone have
a reference for these so I can research? For the few CB s that Bob
recommends, why would I want a separate CB and switch (whether in the same
housing or not) when I can get the switch/CB in one smaller package? I
know there s a price difference.
|
What economy do you perceive for the use of switch-breakers? The
total number of protected branches from the busses generally
outnumber the total branches with switches by 2:1 or more.
This means that for every switch-breaker, you have at least one
circuit that needs only protection and no switch. This has the
effect of "doubling" the busses. You'll have a main bus with no
switches on it, and second one in front of the pilot with
switch-breakers. You'll perhaps have two e-busses. You can't
use switch-breakers on a battery bus . . . unless perhaps
your battery is right under your seat and the battery-bus
switch-breakers are on the front side of the seat under your
knees.
A switch breaker is always more expensive than a local switch,
remote breaker combination . . . which in turn is more expensive
than a local switch, remote fuse combination. Since you'll need
busses with both switched and non-switched protection, $time$
to install land cost of ownership is highest for the system
utilizing switch-breakers.
I'll suggest that switch-breakers in light aircraft are not
part of an elegant solution.
Bob . . .
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< What is so wonderful about scientific truth...is that >
< the authority which determines whether there can be >
< debate or not does not reside in some fraternity of >
< scientists; nor is it divine. The authority rests >
< with experiment. >
< --Lawrence M. Krauss >
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