I recently got into the hobby and built my first plane. It is a foam pusher with a carbon fiber arrow for a tail boom. The thing flies pretty well, however the motor is a little concerning. The motor does not respond at all until the throttle stick is about 1/3-1/2 of the way up, but then everything functions fairly normally up to about 70-80% throttle. However this is when the motor starts to make a horrible grinding noise. If you accelerate the motor slowly enough though (and i mean stupidly slowly) through this throttle range the noise doesn't happen and it will hit full throttle. It almost sounds like stripped gears, however it being a brushless outrunner, doesn't have any gears... I originally just figured its the side effect of buying a ~$13 motor/esc combo off of amazon. It's an 1100 KV motor swinging a 10x4.7 sf prop. My theory is that the motor is lacking in torque and just cant accelerate the prop, but im interested if anyone else has experienced this or if there is a way to fix it.