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P&W R1340
500 SHP @ 2250 RPM

The durability, safety, flying ease and proven heritage of the AT-401B makes it the choice of operators looking for an affordable upgrade to a high capacity, low maintenance piston engine ag plane. Here is an aircraft with an impressive combination of performance and features that help operators cover more acres at less cost.
At the heart of the AT-401B's economy is its ultra-powerful Pratt & Whitney R1340 radial piston engine. Widely regarded as one of finest radial engines ever produced, the R1340 has been remanufactured to Air Tractor specifications for improved performance, economy and reduced maintenance.
Like all Air Tractor models, the AT-401B provides superb visibility, a stall resistant wing design, and more than ample power that's balanced by clean aerodynamics to provide speed and maneuverability even at maximum payloads.
The AT-401B makes a great partner for a growing business. From its large 400-gallon hopper that helps cut ferry time, to its Hoerner wingtips which improve the rate of climb and overall control. The AT-401B delivers unsurpassed value -- economically, efficiently and productively.


Engine Type P&W R1340
500 SHP @ 2250 RPM
Propeller 12D40 HUB 6101A-12 BLADES
Cruise Speed at 2438m 230 kph
Woking Speed 193-225 kph
Stall Speed, flaps up 117 kph
Stall Speed, flaps down 98 kph
Stall Speed as usually landed 87 kph
Rate of Climb 158 mpm
Hopper Capacity 1514 L
Take-off Weight 3565 kg
Landing Weight 2722 kg
Empty Weight w/spray equipment 1925 kg
Useful Load 1640 kg
Take-off Distance 402 m
Fuel Capacity 476 L
Range, economy cruise at 2438m 1014 km