The An-2 was designed as a utility aircraft for use in government-owned forestry and agriculture. However, the basic airframe is highly adaptable and numerous variants have been developed. These include hopper-equipped versions for crop-dusting, scientific versions for atmospheric sampling, water-bombers for fighting forest-fires, flying ambulances, float-equipped seaplane versions, lightly armed combat versions for dropping para-troops, and of course the most common An-2T version, which is the 12-seater passenger aircraft. All version (other than the An-3) are powered by a 1000-horsepower 9-cylinder Shvetsov radial engine, which was developed from the Wright R-1820.
