Which Motor Do I need?

Choosing a brushless motor can be intimidating, but understanding a few specific characteristics you can easily find the perfect motor. Motors with higher winds spin slower and they have a lower Kv (RPM/V). They spin a larger propeller at slower speeds and at a lower current. Motors with lower winds have a higher Kv (RPM/V). They spin a smaller propeller at higher speeds and at a higher current than high turn motors.

To determine the motor, decide on your flying style and aircraft. Is it a sport fast flyer, or a slow plane with a lot of drag? For the high speed airplane a low turn high KV that spins a small prop fast would be the right choice. For the slow, high drag plane, a high turn motor (low KV)that can spin a much larger prop and produce a lot of thrust at low speed is what you want.  A very loose comparison is RPM = KV

Low KV = slow RPM, large prop, low AMP (current)
High KV = fast RPM, small prop, high AMP (current)


Below is a motor chart that will assist in choosing a brushless motor based on aircraft weight. However, choosing a motor is dependent on aircraft type, battery and flying style. Below is a chart that will guide you in your choice. When choosing a motor, the battery, electronic speed controller ESC must be able to handle the current. Clicking on any motor will provide more specific motor information.

Glow to Electric Conversions

GraysonHobby Park Flyers

Economy Brushless

RC-Tech

Grayson Hobby

Silver Bullet Series