Convertible airplane with exposable rotors

A convertible aircraft operable to transition between a vertical take-off or landing (VTOL) mode, a hover mode, and a horizontal flight mode, the aircraft comprising:

• a fuselage
• one or more jet or turboprop engines configured to provide propulsion for the aircraft in the horizontal flight mode;
• a fixed wing and a horizontal stabilizer, configured to provide lift for the aircraft in the horizontal flight mode;
• a system of at least four exposable lifting rotors, configured to provide all of the lift for the aircraft in the VTOL mode and in the hover mode, wherein two of said lifting rotors are installed inside the horizontal stabilizer and the other of said lifting rotors are installed inside the wing;
• sliding panels disposed on upper and lower surfaces of each of the wing and horizontal stabilizer and at the tips of each of the wing and horizontal stabilizer, wherein:
• during the VTOL and hover modes, the sliding panels are configured to be in an extended position and expose the lifting rotors, the lifting rotors thereby lifting the aircraft,
• during the horizontal flight mode, the sliding panels are configured to be in a retracted position and cover the rotors, and
• during a transition mode in which the aircraft transitions between the VTOL mode and the horizontal flight mode, or between the hover mode and the horizontal flight mode, the sliding panels are configured to move between the extended and retracted positions;
• electric motors for driving the lifting rotors;
• a control and stabilization system configured to control the VTOL mode, the hover mode, and the transitions of the aircraft between the VTOL mode and the horizontal flight mode, or between the hover mode and the horizontal flight mode,
• wherein the control and stabilization system comprises a set of three gyrometers and three accelerometers and a global positioning system (GPS), wherein the control and stabilization system is configured to:
• determine an attitude, position, and altitude of the aircraft based on the three gyrometers, the three accelerometers, and the GPS,
• during the VTOL mode and the hover mode, control a speed of each of the lifting rotors based on the attitude, position, and altitude of the aircraft, and
• during the transition mode:
• control a speed of each of the lifting rotors based on the attitude, position, altitude, and airspeed of the aircraft, and
• control movement and placement of each of the sliding panels between the extended position and the retracted position based on the airspeed of the aircraft.