Abstract: A helicopter having increase stabilization and protective rings for the propellers is provided. The helicopter includes a helicopter body, and at least one propeller connected by a shaft to the helicopter body. The at least one propeller is configured to rotate in a first direction about an axis defined by the shaft. A protective ring is pivotally connected to the at least one propeller at pivot points positioned at opposing ends thereof. The protective ring rotates with the at least one propeller and is pivotable about a longitudinal axis defined by the at least one propeller, such that the protective ring pivots independent of a tilting angle of the propeller.

Abstract: A toy model having a chassis, radio control circuitry, shock absorbers, and a swing servo mechanism configured to move left and right wheels of the model up and down. A leaning mechanism in communication with the radio control circuitry and the swing servo is employed, and the leaning mechanism is configured to provide a leaning movement and to shift a center of gravity of the model in a steering direction. Steering knuckles are twisted against steering holders to make a twisted angle with respect to a pivot pin, and the pivot pin enables the simultaneous leaning movement of the model and steering to an inclined side of the model.