Abstract: The invention relates to a propulsion system for aircraft, especially for high-flying and long-distance flying unmanned aircraft, to the aircraft itself and to a method for controlling aircraft. Said propulsion system has a first jet turbine engine and a second jet turbine engine (22, 24). The invention also provides that the first jet turbine engine is a turbine engine (22) and the second jet turbine engine is an airscrew turbine engine (24). Said airscrew turbine engine (24) remains non-operational at least during the process for starting the aircraft (10).

Abstract: An aircraft has at least one drive motor coupled to first and second propellers for forward thrust of the aircraft. The first propeller is dimensioned for takeoff and landing conditions and for flight conditions below a predetermined first flight altitude. The second propeller has a radius which is larger than a radius of the first propeller and is dimensioned for a second flight altitude which is substantially greater than the first flight altitude. The two propellers are alternatingly coupled with the at least one drive motor so that the two propellers are respectively individually adapted to the power of the at least one drive motor for a full utilization of the power of the at least one drive motor for forward thrust.

Abstract: Aircraft, in particular for travel and sporting purposes or as a plane for business travel, having a rescue system which, by means of a parachute, makes it possible to return at least the cabin including the persons contained therein, to the ground, wherein, in particular, a parachute arrangement is provided having at least one parachute, with this arrangement being stowed in a first region of the fuselage which is located forward of the center of gravity of the aircraft in the flight direction, wherein additional means are provided which exert a force effect in the manner that between the longitudinal axis of the aircraft (1) and its direction of movement an angle of substantially 90.degree. is formed (slip position) before the parachute (7.1, 7.2) is deployed.