[simpits-tech] Aircraft power question

[Roy Coates]

Remember that there will be multiple buses which can be shed or
cross-linked.  I know zip about the Sabreliner but even our baby J41 has 5
(maybe 6?) buses. A very basic 737 has eleven.  So, the wiring won't be as
simple as you might like.

>From my limited experience - the battery master does indeed operate a relay
but then the battery power is fed to the bus controller which is likely
another box full of relays hidden away somewhere.

Also, not all the gubbins in the cockpit will be fed from the same bus.
Essential vs Non-Essential items, left or right side, there are many
permutations.

Test meter out... and lots of patience!

Roy.



On 27 December 2013 04:59, Matt Bailey <dabigboy at cox.net> wrote:

> I got a chance to poke around the Sabreliner a little bit with a
> multimeter and a cable checker/sound'r-out'r and tried figuring out the
> wire routing for cockpit power. I am a little perplexed...as far as I
> can tell, none of the wires going to the battery master actually exit
> the cockpit directly. Do aircraft normally have only a relay connected
> to the battery master switch? I would think that at least the common
> lead should trace out to the wire going to the negative terminal of
> the aircraft's batteries. I assume I need to dig in the forward
> nose/avionics bay some more for relays or terminal blocks.
>
> I want to use as much of the plane's original wiring as possible. Any
> particular pointers you guys could offer in tracking down the power
> delivery circuits to the cockpit? The wiring diagram for the entire
> plane from Sabreliner Corp is over $700.....a little more than I can
> spend when I am trying to save up to build a shop for this thing this
> summer!
>
> --
> Matt Bailey
>
> Keeping It Real:
> Sabreliner 60 Flight Simulator
> Serial # 306-61 - N1JX
> http://sabrelinersim.com
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