The KV value of a brushless motor is defined as speed/V, which indicates the increase in the idling speed of the brushless motor for every 1 volt increase in input voltage. For example, if the KV value of a brushless motor is 1000, it means that the motor's no-load speed will increase by 1000 rpm for every 1V increase in voltage. This parameter is very important for selecting a suitable motor and battery combination because it directly affects the performance of the motor and the flight characteristics of the aircraft. In addition, the KV value of a motor is also related to the number of turns of its winding. The KV value of a motor with more turns is lower, while the KV value of a motor with fewer turns is higher.
