Given the question: Information:  - The Flettner Fl 282 Kolibri ( `` Hummingbird '' ) is a single - seat open cockpit intermeshing rotor helicopter , or synchropter , produced by Anton Flettner of Germany . According to Yves Le Bec , the Flettner Fl 282 was the world 's first series production helicopter .  - Anton Flettner (November 1, 1885  December 29, 1961) was a German aviation engineer and inventor. He made important contributions to airplane and helicopter design. He was born in Eddersheim (today a district of Hattersheim am Main).  - A helicopter is a type of rotorcraft in which lift and thrust are supplied by rotors. This allows the helicopter to take off and land vertically, to hover, and to fly forward, backward, and laterally. These attributes allow helicopters to be used in congested or isolated areas where fixed-wing aircraft and many forms of VTOL (vertical takeoff and landing) aircraft cannot perform.  - A fixed-wing aircraft is an aircraft, such as an aeroplane, which is capable of flight using wings that generate lift caused by the vehicle's forward airspeed and the shape of the wings. Fixed-wing aircraft are distinct from rotary-wing aircraft, in which the wings form a rotor mounted on a spinning shaft, and ornithopters, in which the wings flap in similar manner to a bird.  - Hattersheim am Main is a town in the Main-Taunus district, Hesse (Germany) and part of the Frankfurt Rhein-Main urban area.  - A rotorcraft or rotary-wing aircraft is a heavier-than-air flying machine that uses lift generated by wings, called rotary wings or rotor blades, that revolve around a mast. Several rotor blades mounted on a single mast are referred to as a rotor. The International Civil Aviation Organization (ICAO) defines a rotorcraft as "supported in flight by the reactions of the air on one or more rotors". Rotorcraft generally include those aircraft where one or more rotors are required to provide lift throughout the entire flight, such as helicopters, cyclocopters, autogyros, and gyrodynes. Compound rotorcraft may also include additional thrust engines or propellers and static lifting surfaces.  - Thrust is a reaction force described quantitatively by Newton's second and third laws. When a system expels or accelerates mass in one direction, the accelerated mass will cause a force of equal magnitude but opposite direction on that system. The force applied on a surface in a direction perpendicular or normal to the surface is called thrust. Force, and thus thrust, is measured in the International System of Units (SI) as the newton (symbol: N), and represents the amount needed to accelerate 1 kilogram of mass at the rate of 1 meter per second per second.  - C is the third letter in the English alphabet and a letter of the alphabets of many other writing systems which inherited it from the Latin alphabet. It is also the third letter of the ISO basic Latin alphabet. It is named "cee" (pronounced ) in English.  - A vertical take-off and landing (VTOL) aircraft is one that can hover, take off, and land vertically. This classification includes fixed-wing aircraft as well as helicopters and other aircraft with powered rotors, such as cyclogyros/cyclocopters and tiltrotors. Some VTOL aircraft can operate in other modes as well, such as CTOL (conventional take-off and landing), STOL (short take-off and landing), and/or STOVL (short take-off and vertical landing). Others, such as some helicopters, can only operate by VTOL, due to the aircraft lacking landing gear that can handle horizontal motion. VTOL is a subset of V/STOL (vertical and/or short take-off and landing).    After reading the paragraphs above, choose the best answer for the entity that related to 'flettner fl 282' with the relationship of 'instance of'.  Choices: - 1  - aircraft  - airplane  - alphabet  - area  - december  - direction  - district  - force  - helicopter  - letter  - magnitude  - mass  - motion  - november  - organization  - part  - rotorcraft  - single  - subset  - surface  - system  - town  - vehicle  - vertical takeoff and landing  - wing
The answer is:
airplane