Air Tractor AT-400

AT-400 family
Role	Agricultural aircraft
Manufacturer	Air Tractor
First flight	1979
Introduction	1980

An AT-400 on the runway

The Air Tractor AT-400 is a family of agricultural aircraft that first flew in the United States on 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 (507 kW) Pratt & Whitney Canada PT6A-15AG engine and 400 US gal (1,510 L) hopper. Short-span (45 ft 1¼ in (13.75 m)) wings.^[1] 72 built.^[2]
  • AT-400A - AT-400 with 550 hp (410 kW) Pratt & Whitney Canada PT6A-20 engine.^[1] 14 built.^[2]
• AT-401 - AT-301 with longer-span wings and 400 US gal (1,510 L) hopper, powered by 600 hp (447 kW) Pratt & Whitney R-1340 radial engine.^[3] 168 built.^[2]
  • AT-401A - AT-401 with PZL-3S engine. One built.^[2]
  • AT-401B -Improved revision of AT-401, with revised wingtips and further increased span (51 ft 1¼ in (15.57 m)). 69 built by December 2001.^[2]
• AT-402 - AT-401 with Pratt & Whitney Canada PT6A-15 engine.^[3] 68 built.^[2]
  • AT-402A - low cost version of AT-401B, with Pratt & Whitney Canada PT6A-20 engine.^[2] 103 built by December 2001.^[2]
  • AT-402B - improved version of AT-402, with revised wingtips and increased span of AT-401B.^[2] 31 built by December 2001.^[2]

Specifications (AT-401)

Data from Janes's All The World's Aircraft 1993-94 ^[3]

General characteristics

• Crew: one
• Capacity: 400 US gal (1,510 L) chemicals
• Length: 27 ft 0 in (8.23 m)
• Wingspan: 49 ft 1¼ in (14.97 m)
• Height: 8 ft 6 in (2.59 m)
• Wing area: 294.0 ft² (27.31 m²)
• Aspect ratio: 8.20:1
• Empty weight: 4,135 lb (1,875 kg)
• Gross weight: 7,860 lb (3,565 kg)
• Powerplant: 1 × Pratt & Whitney R-1340 radial engine, 600 hp (447 kW)

Performance

• Maximum speed: 156 mph (251^[4] km/h)
• Cruise speed: 143 mph (230^[5] km/h)
• Stall speed: 61 mph (99^[6] km/h)
• Range: 630 miles (1,014 km)
• Rate of climb: 1,100 ft/min (5.6 m/s)

See also

Related development

• AT-300
• AT-501
• AT-602
• AT-802

References

Notes

1. Taylor 1988, p.323.
2. Jackson 2003, p.507.
3. Lambert 1993, pp. 412–413.
4. at sea level
5. at 4,000 ft (1,220 m)
6. flaps down

Bibliography

• Jackson, Paul (2003). Jane's All The World's Aircraft 2003–2004. Coulsdon, UK: Jane's Information Group. ISBN 0-7106-2537-5.
• Lambert, Mark (1993). Jane's All The Worlds Aircraft 1993-94. Coudsdon, UK: Janes's Data Division. ISBN 0-7106-1066-1.
• Simpson, R. W. (1995). Airlife's General Aviation. Shrewsbury: Airlife Publishing. pp. 31–32.
• Taylor, John W.R. (editor) (1988). Jane's All The World's Aircraft 1988-89. Coulsden, UK: Jane's Defence Data. ISBN 0-7106-0867-5.