Abstract: A brake system used in a remote-control toy car is disclosed to include brake pads and brake discs alternatively arranged on two holder members at two sides of a differential, two shafts respectively pivotally mounted in the two holder members and deviated from one side of the center line, each shaft having an eccentrically arranged actuating blocks, and two brake rods for pulling by an external pull force to bias the shafts and to force the eccentrically arranged actuating blocks of shafts against the brake discs and brake pads evenly so as to stop the remote-control toy car efficiently.

Abstract: A clutch of a twain engine remote control automobile comprising a flywheel stand on the rolling axis of the engine, some clutch parts are installed on the flywheel stand and have a hood covers these clutch parts; the hood consists of a first hood and a second hood, a protruding wheel is on the first hood, a stopper corresponding to the protruding wheel is on the second hood. When both sides the passive gear is brought by two co-axial gears, the protruding wheel makes the two co-axial gears run synchronously.