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Why would 150Kv 5ohm motor have more torque than 87kV 6.5ohm? Well, the 87Kv motor has got more resistance, and, for a given supply voltage, the current must be less than the 5 ohm version and therefore, the torque would be naturally less. Torque is proportional to current taken. More torque means more current taken. Measure the current and then compare ...

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