Air Tractor AT-400

The Air Tractor AT-400 is a family of agricultural aircraft that first flew in the United States in September 1979. Type certification was awarded to Air Tractor in April 1980. Of low-wing monoplane taildragger configuration, they carry a chemical hopper between the engine firewall and the cockpit.

Variants

AT-400 - AT-301 with 680 shp Pratt & Whitney Canada PT6A-15AG engine and 400 US gal hopper. Short-span wings. 72 built.

AT-400A - AT-400 with 550 hp Pratt & Whitney Canada PT6A-20 engine. 14 built. AT-401 - AT-301 with longer-span wings and 400 US gal hopper, powered by 600 hp Pratt & Whitney R-1340 radial engine. 168 built.AT-401A - AT-401 with PZL-3S engine. One built.AT-401B -Improved revision of AT-401, with revised wingtips and further increased span. 69 built by December 2001.AT-402 - AT-401 with Pratt & Whitney Canada PT6A-15 engine. 68 built.AT-402A - low cost version of AT-401B, with Pratt & Whitney Canada PT6A-20 engine. 103 built by December 2001.
AT-402B - improved version of AT-402, with revised wingtips and increased span of AT-401B. 31 built by December 2001.

AT-400A N3159D is on display at the Steven F. Udvar-Hazy Center in Chantilly, Virginia. It is decorated in a livery depicting Dusty Crophopper from the 2013 animated film Planes, having been given the livery at the request of Disneytoon Studios prior to its acquisition by the museum.