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BrianG · 12.31.2009, 08:38 PM

That's not even 20k rpm on 3s. If you gear high enough to have decent speed, you might get cogging on startup as the ESC tries to find rotor position. A sensored system would tolerate this better. I would get a motor with a kv of ~3000 (for 3s) or 4500 (for 2s). Low kv isn't always best - it's about matching the kv with the voltage.

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BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	12.31.2009, 08:38 PM That's not even 20k rpm on 3s. If you gear high enough to have decent speed, you might get cogging on startup as the ESC tries to find rotor position. A sensored system would tolerate this better. I would get a motor with a kv of ~3000 (for 3s) or 4500 (for 2s). Low kv isn't always best - it's about matching the kv with the voltage.