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Old 08-23-2007 | 08:22 PM
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Heliko
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From: Colorado Springs, CO
Default RE: switch for AXE CP


ORIGINAL: 123Splat

tmmatheny,

The MOTOR (that big round thing with the heat sink on it..) leads appear to be a larger wire guage than the battery to 3-in-1 leads.
As in: "My point is the difference in the size of the battery leads ( the power source) and the Main Motor (the largest power consumer)."

Heliko,
You make a good point on power rating of the switch, but would the axe draw enough amp.s in a high g move to melt the contacts in the switch? (if you answer 'Yes', I'm gonna look to you for an answer on the wire guage question, That on has me stumped.)
Most of the time you worry about the power rating to avoid arching issues (switch damage and/or welding the contacts closed) when switching, not under constant load. But, you still make a good point.

Splat
Splat I agree that it doesn't make sense if motor wires are larger then battery wires unless the ESC was somehow stepping down voltage and stepping up amperage, remember amperage determines wire size, but I don't think that's the case here.

The battery leads should be sized for maximum safe amp draw therefore they can dictate wire sizes throughout the system. Honestly I think the stock motor wires are a bit oversized.

I wouldn't get too hung up on wire size though since most of the components are pre-wired. I only had to worry about sizing the wire on my BL tail harness.

As for the switch. It may be a little on the light side. It's close to the cusp. If you really want the switch, but are worried the only way I could think to test it is to hook it in, bolt down the heli, run it up to full throttle, and see if the switch gets hot. Usually they'll take a bit more than they're rated for plus the Axe will probably only exceed the switch rating for a short time during extreme manuevers.

Also larger wires aren't going to make a noticable difference unless the current wires are grossly undersized in which case the wires would be very hot after a flight. I didn't notice hot wires with my Axe when it was stock whether I was runnig the stock pack or Li-Po's so I think it's OK.

Hope this helps.