Abstract: An electrically powered model aircraft is disclosed in which an on-board electric motor is powered from a ground based electric storage battery. Flight attitude of the aircraft is controlled by torsion control system in which a torsion member is attached at one end to the aircraft and a tubular shaft is disposed about the torsion member, with one end of the tubular shaft being nonrotatably attached to the torsion member at a point spaced from the aircraft and the other end of the tubular shaft being nonrotatably attached to a control device on the aircraft adapted to be operated by rotation of the tubular shaft, to control operation of a control surface of the aircraft. A combination electrical connector and torsion control line extends between, and is releasably mechanically and electrically connected to, the aircraft and to a control handle carried by the airplane operator.

Abstract: A rotary flying toy is disclosed including a rotor having a plurality of radially extending generally horizontal blades adapted to rotate about the vertical axis of the rotor to provide vertical lift. A separate hand-held launcher is provided and includes an electric motor for accelerating the rotor to a rotational velocity sufficient for the rotor to fly when separated from the launcher. Inclined surfaces act to retain the rotor on the launcher until the desired rotational speed is reached and to eject the rotor from the launcher.

Abstract: A line-controlled, centrifugal fan, jet-propelled model airplane is disclosed in which the impeller of a fan contained within the fuselage of the aircraft is driven from a remote drive unit by an elongated flexible cable contained within a flexible sheath. The impeller rotates about an axis perpendicular to the longitudinal axis of the airplane and is driven in a direction of rotation tending to rotate the airplane about its lateral axis in a nose-up direction, due to the frictional contact of the compressed air between the rotating impeller and the housing of the centrifugal fan mounted within the fuselage. A flywheel powered by the electric motor in the remote drive unit controls the rate of acceleration and deceleration of the aircraft as an electric motor in the drive unit is switched on and off.

Abstract: A line-controlled, centrifugal fan, jet-propelled model airplane is disclosed in which the impeller of a fan contained within the fuselage of the aircraft is driven from a remote drive unit by an elongated flexible cable contained within a flexible sheath. The impeller rotates about an axis perpendicular to the longitudinal axis of the airplane and is driven in a direction of rotation tending to rotate the airplane about its lateral axis in a nose-up direction, due to the frictional contact of the compressed air between the rotating impeller and the housing of the centrifugal fan mounted within the fuselage. This abstract is not to be construed in any way to define or limit the invention set forth below.

Abstract: A torsional control system for model aircraft is disclosed in which a torsional control line extends from the aircraft to a control handle for rotating the control line, and carries all tensional forces between the aircraft and handle. A flexible shaft has one of its ends attached to the control line at a point spaced from the control line's attachment to the aircraft and the other end attached to a control device on the aircraft adapted to be operated by rotation of the flexible shaft means. Rotation of the control line by the control handle produces a proportional rotation of the flexible shaft and control device without subjecting the control device to line tension in the control line. This abstract is not to be construed in any way to define or limit the invention set forth below.

Abstract: A remotely powered and controlled aircraft is provided of the type wherein the propeller is driven from a remote drive unit by an elongated flexible cable confined within a flexible tube. The aircraft of the invention includes a secondary control knob slidably and rotatably mounted about the flexible tube for selectively controlling the effective length of the tube and cable to thereby control the radius of flight of the aircraft. In a preferred embodiment, the aircraft is a biplane with a unique wing support construction, including eyelets in the wings and flexible struts having wing engaging hooks thereon which may be selectively inserted through the eyelets for engagement with the wings. This abstract is not to be construed in any way to define or limit the invention set forth below.