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An agricultural aircraft is an Aircraft that has been built or converted for Agricultural use -- usually Aerial Application of Pesticide s ( Crop Dusting ) or Fertiliser ( Aerial Topdressing ); in this role they are referred to as "top dressers" or "crop dusters." Agricultural aircraft are also used for hydroseeding. bait on a Soybean field.]] The most common agricultural aircraft are Fixed-wing , such as the Grumman Ag Cat , PAC Fletcher , or Rockwell Thrush Commander but Helicopter s are also used. Autogyros have been tested for aerial application as well. Crop dusting with insecticides began in the 1920s in the United States. The first widely used agricultural aircraft were converted war surplus biplanes, such as the De Havilland Tiger Moth and Stearman . After more effective Insecticide s and Fungicide s were developed in the 1940s, and Aerial Topdressing was developed by government research in New Zealand , a large number of purpose-built agricultural fixed-wing aircraft appeared. In the US and Europe they are typically small, simple, and rugged. Many have spraying systems built into their wings, and pumps are usually driven by wind turbines. In places where farms are larger, such as New Zealand , Australia , the former Warsaw Pact nations and parts of the developing world, larger and more powerful aircraft have been used, including turboprop powered aircraft PAC Cresco , twin engined types, Lockheed Lodestar and varying from the versatile and utilitarian Antonov An-2 biplane to the bizarre Turbofan powered Biplane , the WSK-Mielec M-15 Belphegor - all however tend to be of simple rugged STOL design. In places where dedicated use as an agricultural aircraft is uneconomic, utility types such as the De Havillland Canada DHC2 Beaver have been used. In the case of Helicopter s, tanks are placed on or outside the body of the aircraft, while a spray rig, extending outward to the sides, is attached well below the main rotor blades. Hydroseeding is often done by helicopters using tanks and drop systems much like those used for aerial firefighting. SEE ALSO |
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