Abstract: A commonly assumed operational requirement for a multi-rotor vehicle, often referred to as a “Quad-Copter” or “Quad-Rotor”, is to have onboard a minimum of three motors, in order to provide a stable hover, and more frequently as many as eight motors. The Twin Propeller Attitude Control (TPAC) Air Vehicle, using a hybrid control system, needs only two motors, in order to achieve full control of altitude, pitch, roll and yaw. Pitch control is achieved by means of differential thrust, while roll and yaw control is accomplished via thrust vectoring. In the event of loss power of one or both engines, a parachute will be automatically released.

Abstract: A roadable vehicle with a single nacelle assembly that contains a pair of inline counter-rotating propellers. Two inline counter-rotating engines are directly connected to the propellers. One engine is shut down in horizontal flight to improve efficiency. Gimbal mounting the nacelle assembly permits thrust to be directed forward to back and left to right to control the vehicle position in the horizontal plane, when hovering. Varying the relative engine speeds controls yaw. The roadable vehicle is adaptable as an unmanned vehicle. The foldable wings equipped with automotive type wheels provide for travel off-road as well as on the highway.

Abstract: A Foldable Rise and Stare Vehicle with a single engine assembly that contains a pair of inline counter-rotating propellers. Two inline counter-rotating engines are directly connected to the propellers. Gimbal mounting the engine assembly permits thrust to be directed forward to back and left to right to control the vehicle position in the horizontal plane, when hovering. Varying the relative engine speeds controls yaw. The Foldable Rise and Stare Vehicle is adaptable as an unmanned vehicle. The vehicle collapses into a flat assembly similar to a foldable beach chair, allowing for convenient transportation.

Abstract: A commonly assumed operational requirement for a multi-rotor vehicle, often referred to as a “Quad-Copter” or “Quad-Rotor”, is to have onboard a minimum of three motors, in order to provide a stable hover, and more frequently as many as eight motors. The Twin Propeller Attitude Control (TPAC) Air Vehicle, using a hybrid stabilization system, needs only two motors, in order to achieve full control of altitude, pitch, roll and yaw. Pitch control is achieved by means of differential thrust, while roll and yaw control is accomplished via thrust vectoring. In the event of loss power of one or both engines, a parachute will be automatically released.

Abstract: A roadable vehicle with a single nacelle assembly that contains a pair of inline counter-rotating propellers. Two inline counter-rotating engines are directly connected to the propellers. One engine is shut down in horizontal flight to improve efficiency. Gimbal mounting the nacelle assembly permits thrust to be directed forward to back and left to right to control the vehicle position in the horizontal plane, when hovering. Varying the relative engine speeds controls yaw. The roadable vehicle is adaptable as an unmanned vehicle. The foldable wings equipped with automotive type wheels provide for travel off-road as well as on the highway.

Abstract: A Foldable Rise and Stare Vehicle with a single engine assembly that contains a pair of inline counter-rotating propellers. Two inline counter-rotating engines are directly connected to the propellers. Gimbal mounting the engine assembly permits thrust to be directed forward to back and left to right to control the vehicle position in the horizontal plane, when hovering. Varying the relative engine speeds controls yaw. The Foldable Rise and Stare Vehicle is adaptable as an unmanned vehicle. The vehicle collapses into a flat asssembly similar to a foldable beach chair, allowing for convenient transportation.