[simpits-tech] Aircraft power question

[Cris Harrison]

On 12/26/2013 10:59 PM, Matt Bailey 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?
YES, lots of relays
1. Battery
2. External power
3. Starter(s)

>   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?
LOL For G-d sakes why?? Or do you just like to whip yourself?
> 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!
>
Mat I have 2 old blog which where about somebody wanted to have one alt 
out/on light for 2 generators and I answered using 2 less.. then I 
started to describe my twin's power system...
My old blogs where written in August 2011:
http://phoenixcomm.wordpress.com/2011/08/24/power-1/
http://phoenixcomm.wordpress.com/2011/08/26/power-2/

I will put up a update on
http://www.element14.com/community/people/phoenixcomm/blog

oh, yes a bus should be a hunk of copper that is mounted by a few 
standoffs. It should be drilled and taped.  It could all so be a 
terminal strip with jumpers. Do Not, think that you can use some copper 
wire twisted together..( which I have seen done on some home builds.. 
And wondered about the competency of the inspector!!  )

Just because this is a 'sim' you should use the same standards that 
aircraft was built to.

Enjoy
Cris H.

BTW I have a copy of the F-4 Phantom..
<http://www.phoenixaerospace.us/downloads/pubs/>http://www.phoenixaerospace.us/downloads/pubs/NATOPS-Flight-Manual-Navy-Model-RF-4B-Aircraft.pdf 
see pages 65 and 66 this should give you a good start..


-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.simpits.org/pipermail/simpits-tech/attachments/20131228/09bd0792/attachment-0001.html