Since the [drones SE](https://aviation.meta.stackexchange.com/questions/450/any-of-you-aviation-enthusiasts-here-interested-in-personal-use-of-drones) site did not make the cut, I think that this site would be the closest for many questions involving hobby-aircraft. I would like to ask what is the community consensus as far as questions relating to:

mechanical configuration (i.e. frames, propeller location and orientation, weight distribution) for helicopters, multi-rotors (quadcopters/etc.), and fixed-wing aircraft

Propellers - materials, pitch, balancing, etc. 

Motors - Kv ratings, power, torque, weight, efficiency, etc. 

Electronics - Flight controllers, RC units (transmission procotols, i.e. bluetooth, wifi, radio, etc.), video capture and transmission, etc. 

Sensors - accelerometers, gyroscopes, magnetometers, air pressure, GPS, temperature, uses, limitations, configuration, placement, etc. 

I would be especially interested in where "The line is drawn" as far as what is accepted on this site and what would be better asked on Physics, Electrical, Radio, or Arduino, and if there is a "void" where there are questions that don't fit on any of the current SE sites (and if that void is intentional or not)

related question, but the answers are vague:
[rc plane design on-topic?](https://aviation.meta.stackexchange.com/questions/387/are-questions-about-rc-plane-design-on-topic)

looking around, there seems to be a few "overly broad" questions already such as [this](https://aviation.stackexchange.com/questions/474/quadcopter-design), but also some "good" ones such as [this](https://aviation.stackexchange.com/questions/8316/how-to-calculate-the-required-motor-power-and-rotor-size-with-respect-to-the-wei?rq=1) or [this](https://aviation.stackexchange.com/questions/11260/can-a-drone-travel-beyond-the-range-of-its-remote-control-signal)