Editing Radio-controlled model (section)

=== Electrical ===
[[Electric power]] is often the chosen form of power for aircraft, cars and boats. Electric power in aircraft in particular has become popular recently, mainly due to the popularity of [[park flyer]]s and the development of technologies like [[brushless motor]]s and [[lithium polymer battery|lithium polymer batteries]]. These allow electric motors to produce much more power rivaling that of fuel-powered engines. It is also relatively simple to increase the [[torque]] of an electric motor at the expense of speed, while it is much less common to do so with a fuel engine, perhaps due to its roughness. This permits a more efficient larger-diameter propeller to be used which provides more thrust at lower airspeeds. (e.g. an electric glider climbing steeply to a good thermalling altitude.)

In aircraft, cars, trucks and boats, glow and gas engines are still used even though electric power has been the most common form of power for a while.  The following picture shows a typical brushless motor and speed controller used with radio controlled cars. As you can see, due to the integrated heat sink, the speed controller is almost as large as the motor itself.  Due to size and weight limitations, heat sinks are not common in RC aircraft [[electronic speed controller]] (ESCs), therefore the ESC is almost always smaller than the motor.