Did you mean to say that? Don't we fit a smaller prop to a motor so that it spins faster into the region where the current is lower.
The faster the motor spins, the higher the back emf, so the lower the net voltage driving current through the motor, so the less current you get.
I should qualify, the faster the motor spins, "with the same prop", the more amps it will draw. Yes, we put smaller props on higher kv motors to reduce the amp draw. We also put larger props on 2S, a smaller one on 3S and even smaller one on 4S. Because the motor will spin faster on 4S than 3S & we need to reduce the amp draw.
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