Abstract: A control member is rotatably mounted on the fuselage or on the wing of a model aircraft in spaced relation with a supporting surface of the fuselage. A gear leg is supported at one end by the control member and supports a landing wheel at its spaced opposite end. The gear leg extends radially of the control member. A torsion spring is coaxially mounted with the control member for storing energy when the control member is in a position whereby the gear leg is fully extended for ground operations and for releasing stored energy to rotate the control member in a manner whereby the gear leg is retracted for flying operations. A gear retracting initiator coupled to the torsion spring initiates gear retraction. An extend lock locks the gear leg in its fully extended position. A retract lock locks the gear leg in its retracted position.