Hey forum, So I plan on creating a remote controlled quadcopter and I have a query regarding its propellers' sizes. I read that small propellers require motors with a high KV (RPM per volt), and large propellers need motors with a lower KV. There seems to be a way of determining how to match propellers with motors. Now I understand why small propellers need powerful motors, but why is it that large propellers need less powerful motors? Is it necessary that they have slower motors, or was that only said to maximise efficiency? I read that small props + high KV = acrobatic quadcopter, and large props + low KV = efficient quadcopter. Does this have anything to do with pitch at all? Why do small propellers at a high KV cause the quadcopter to be 'acrobatic'? I'd like to understand the physics behind that. Thanks.