Abstract: A model aircraft launcher for releasing a self-propelled model aircraft by remote control. The launcher comprises an elongate arm pivotally anchored to a stationary surface, a spring arm swingably attached to one end of the elongate arm for spring-action swinging motion between a hold position and a release position, and a release member with an attached remote control cord. As the cord is pulled, the release member slides over an end portion of the spring arm, initially exerting a spring bias on the arm, and finally disengaging the arm, allowing the arm to swing by spring action to its release position. The aircraft, attached to a line held by the spring arm, is thereby released for takeoff.

Abstract: A three-wire control system for a tethered engine-powered model aircraft. The system features a special linkage arrangement which assures evenly distributed tension in all of the control lines under all operating circumstances. The system further features a construction which, through using a special organization of multiple pivot connections, greatly minimizes friction between moving parts, and promotes exceptionally smooth precision control of such an aircraft.