Air Tractor series

The Air Tractor was designed by company founder Leyland Snow who earlier designed the Snow S-2 (built by Rockwell and Ayres). The initial Air Tractor model was the Pratt & Whitney R-1340 radial powered AT-301 which established the Air Tractor series' basic configuration. First flight was in 1973, and 600 were built. The PT6 turbine powered AT-302 introduced in 1977 was replaced by the AT-402. The R-1340 powered AT-401 introduced a greater span wing and increased chemical hopper capacity and first flew in 1986. The AT-402 is similar other than its 505kW (680shp) PT6A turboprop engine, the AT-402B has increased span wings. The AT-502A (first flight Feb 1992) is based in the 402B but has a far more powerful 820kW (1100shp) PT6A-45R turbine driving a slow turning five blade prop. Its excess power reserves allow high speed or high altitude operations. The AT-502B has Hoerner wingtips and optional equipment including GPS. The 5.4 tonne MTOW PT6 powered AT-602 first flew on December 1 1995 and became available for delivery in the second half of 1996. The larger and heavier two seat AT-802 and single seat AT-802A are the largest purpose designed single engine ag aircraft in production. First flight was in October 1990. The AT-802F is a dedicated firefighting version.