Radio-controlled (or R/C) cars are self-powered model cars or trucks that can be controlled from a distance using a specialized transmitter. The term 'R/C' has been used to mean both 'remote controlled' and 'radio controlled', where 'remote controlled' includes vehicles that are connected to their controller by a wire, but common use of 'R/C' today usually refers to vehicles controlled by a radio-frequency link. This article focuses on radio-controlled vehicles only. Cars are powered by various sources. Electric models are powered by small but powerful electric motors and rechargeable nickel-cadmium, nickel metal hydride, or lithium polymer cells. There are also brushed or brushless electric motors. Most fuel-powered models use glow plug engines, small internal combustion engines fueled by a special mixture of nitromethane, methanol, and oil (in most cases a blend of castor oil and synthetic oil). These are referred to as 'nitro' cars.
Contributions by Lucky 6.9, Triddle, and Soupisgoodfood.