ORIGINAL: shd3920
Your motor is smaller than mine, plane is a pound smaller, and your ESC is 5 amps more than mine. That is why your ESC is getting warm, it is way too big for your motor and plane. Why would you have a 45amp ESC in a motor and plane that is smaller than mine, when mine recommends only a 40amp? Sounds to me like yours should be something around 30-35 amps. It's simple that you are using too many amps for a small motor and causing it to get hot.
This is incorrect. Amps are the amount of power that is being drawn. An ESC rated for 45 amps means that is can handle a MAXIMUM power draw of 45 amps. It does not mean that it is PUSHING 45 amps through a motor.
Ken