Darda - World"s fastest motorized cars and track systems. In the year 1970 Helmut Darda invented the first and smallest exchange engine worldwide that can be wound forth and back. Still today the DARDA racing track has not lost its fascination. Considering a scale of 1:60, the little racers achieve a speed of 900 km/h. Endless joy! A real DARDA professional builds up his own racing track. By combining different sets and lose tracking material, the racing track can be enormous - also concerning the height. The DARDA engine succeeds without problems - playfully! This set is perfect for every Darda newcomer and any car track set lover. All of Darda"s windup race cars are powered by their exclusive, amazing spring coil "Mega Motor". The mega motor propels the model cars at up to 30mph, over distances of 75 feet (this is a scale speed of over 600mph!). The "Mega-Motor" cannot be over wound, and requires no batteries or electricity. It is wound by pressing gently on the car and moving it backwards and forwards.