Back int he 1960s.... Radio control was still bulky and power hungry. Battery technology was nothing like we have today. As a solution before radio control became more mainstream in the 1970s slot-less systems used the track for power and larger scale cars used simplified short transmission range radio control boards. These radio control slot-less systems did not last more then 5 years. they were replaced in the 1970s by miniaturized electronic transistors making the radio systems cheaper and lighter. Battery technology for rechargeables caught up as well getting rid of dry cells and acid batteries. Radio control slot-less was abandoned and the 1/8 scale and 1/4 scale radio control cars took hold. As the technology improved by the late 1970s 1/10 and 1/12 scale became the norm. Today we have 1/18 1/20 1/32 1/24 1/64 1/87 and 1/144 scale remote control cars. Which was the original goal of these systems giving the player freedom of control and simulation of real racing.
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