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Well good morning sunshine! your up early lol.
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Well you know what they say,
Early to bed , early to rise,
I was between the sheets, but not her thighs
So is there really any viable way to test efficiency? Is heat the only effect to look for?
A couple graphs, these are my Rustler with a 1410 MMP , Badland 30 series tires. On 2s SPC 6000mah 30c 45 MPH 25/84 gearing
On a 3s 3300 30c 45mph
Now if you average the bursts, as there always seems to be 1 or 2 that spike higher, it does seem that it is roughly 1/3 less amps, and the wattage is pretty close. Temps stay about the same also. Even on 2s, nothing is being pushed out of line. Does this mean the overall efficiency is equal?
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The 4.5 vs 6.5 setup runs about 40 degrees cooler on 3s to the 2s.
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When you look at the average draw it takes to drain a 2s 3200 mah in 5 minutes, you will almost be guaranteed some very high apm bursts. That would quite probably take that motor out of it's efficiency range, causing a big increase of motor temp. I know the Novak motors are quite bad about that. I would be interested in what kind of amps that pulls, I haven't logged mine yet. What kind of weight is the Jammin, and do you know what kind of speed it ran?
Wire and resistance, whew who's going to cover that ? Is the current all that really matter when figuring a wires resistance? IOW will the losses of 50 amps and 10 volts, be the same as 50 amps and 20 volts, given the same distance and wire?
The smallest wire I have in anything is the Castle 13g . Which I have always felt was a little lacking , though I have been assured from Castle that it is fine for the wattage and lengths we are running. But I've seen some of the new 1410 motors with wires over a foot long, that has to add some resistance. I've seen the 3800 draw 160 amps, take that with 16inches of 13g and you have to be losing something.
I
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seen a good example with my lithium ion trolling motor setup. By eliminating a 7 foot 10Ga. length of wire, the motor would put out an extra 75 watts of power. This was the only change that was made.
Efficiency was also improved, because that 7 foot length of 10Ga. was noticably warm to the touch. Even though, it was "only" carrying 50 amps
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This reminds me of my car stereo days. If I wanted to send a true 50 amps 7 ft I would have wanted at least 4ga. But I know distance has alot to do with it, and for 1 foot, I'm not sure there would be a noticeable difference in using 10g or 4g.