Popular motors 5012 250KV and 320KV for the take-off weight aircraft 7.6-10kg(8S for quadcopter, 6S for VTOL), users like them because they want more redundancy for their aircraft to replace 5010 brushless motor.80KV will be available for servmotor.it is widely used for the long-range inspection drone mapping drone surveying drone quadcopter hexcopter mulitirotor.