A rotary aircraft (rotorcraft) in which the entire aircraft rotates about
its center of mass as it flies, and in which the center of mass is
located external to the aircraft in the generally triangular region
formed by the aircraft's single wing and two propellers. As the aircraft
flies, the two propellers provide torque about the center of mass and
rotate the wing, which provides lift for the aircraft. The aircraft is
controllable via a stationary radio transmitter that sends commands for
pitch, roll, yaw and altitude. A receiver in the aircraft uses the
transmitted signal to establish the aircraft's instantaneous orientation
in combination with the sent commands to generate control signals that
drive the propeller motors that affect the aircraft's attitude. Pitch and
roll are controlled by pulse width modulation of the propeller motor
voltages in order to affect the thrust at specific portions of the
aircraft's rotation cycle.