What's also important is: Inrunner equals brushed Outrunner equals Brushless

due to the technique, brushless motors can be prevented from frying by the ESC if they are suddendly blocked. brushed motor ESCs don't have that feature afaik.

Outrunners have more torque and inrunners are better for high speeds. Thats why in planks you see outrunners turning props directly and inrunners used either with very small direct drive props or in gearboxes, in a outrunner the outside of the motor turns an in runner is as the name applys, and the advantage to outrunner is they seem to run cooler.

What's also important is: Inrunner equals brushed Outrunner equals Brushless

Because the ESC in a brushless is just the removal of the motor's function (the switching function), it's an extension of the motor, or part of the motor is in the ESC. The part of the ESC that controls the speed is DC and outputs in DC to the oscillator (replaces brushed switching function) right? Just guessing here. So the "motor part" of the ESC, the part that makes a few wires AC (for a few inches) is fed DC, making the motor, and it's wires (which are just extensions of the windings, as you may know if you have ever dealt with the enamel on them while soldering) a DC motor. The battery is DC, the ESC is fed DC. DC is pushed to the part of the controller which drives the phases (oscillator) and then it's sent over a short wire to the actual windings. I call it a DC motor. Brushed motors are considered DC motors, these replaced them with the same DC batteries, they do the same thing, behave the same way. Just because we can explain why it needs three motor wires, does not make it an AC motor. What we should be talking about is wire diameter, winding count, pole count and so on and so on...I want info on winding my own motors, replacing bearings and repairing busted up and used motors and making them into hotrods!!

I'm not explaining it well, here... http://en.wikipedia.org/wiki/Brushless_DC_motor Brushless DC electric motor (BLDC motors, BL motors) also known as electronically commutated motors (ECMs, EC motors) are synchronous motors that are powered by a DC electric source via an integrated inverter/switching power supply, which produces an AC electric signal to drive the motor (AC, alternating current, does not imply a sinusoidal waveform but rather a bi-directional current with no restriction on waveform); additional sensors and electronics control the inverter output amplitude and waveform (and therefore percent of DC bus usage/efficiency) and frequency (i.e. rotor speed). The motor part of a brushless motor is often a permanent magnet synchronous motor, but can also be a switched reluctance motor, or induction motor. http://en.wikipedia.org/wiki/Brushless_AC_electric_motor A Brushless AC electric motor is an electric motor driven by an AC electrical input, which lacks any form of commutator or slip ring. Generally the term 'brushless AC motor' will refer to a permanent-magnet synchronous motor (PMSM) orpermanent-magnet motor (PMM), a synchronous motor which uses permanent magnets rather than windings in the rotor. PMSMs are either axial flux, radial flux, transverse flux, or flux switching depending on the arrangement of components, with each topology having different tradeoffs among efficiency, size, weight, and operating speed. Alternative designs may use reluctance rather than magnets. Asynchronous induction motors are also brushless AC motors. The brushless DC motor is a brushless AC motor with integrated inverter and rectifier, sensor, and inverter control electronics.