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Ernest Christley wrote:
EM/2 0.6A
EC/2 0.3A
Injectors/Coils 10A (@6000RPM)
Fuel Pump-1 6.5A
Fuel Pump-2 6.5A
EWP-1 5A
EWP-2 5A
Landing Lights 10A
LED Position Lights 3A
LED Cockpit Lighting 1A
Cockpit Circulation Fan 2A
Transponder 0.5A
Radio 1A
CD Player 0.3A
Well, yeah, but those EWPs are doing real work in return for saving you that engine HP. So you have a 10A draw there. You're also counting two fuel pumps running - are you actually going to cruise with both going? You'd probably have higher reliability if you switched back and forth, only running both for TO/landing and other critical times. That's another 5A.
I don't know about the injectors/coils but that number looks a bit high to me. You probably need to fuse it for at least that, but it's a pulsed load, so its average power draw is not going to be 10A*12v, the usual formula. It's going to be some smaller percentage of that. I don't have my formula books with me - maybe some geek (heh) can Google it, but the point is that it's probably less than that. (Unless 10A is what somebody measured?) Maybe knock another 2-3A out of that.
Right there that knocks out 17-18A of the load calculation. Not in YOUR case, since you're using an EWP and it'll draw what it draws, for instance. But that's a sacrifice you're making. =)
Regards,
Chad
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