1986 Air Tractor AT-301 (Pratt & Whitney R-1340 engine) N7311X (sn 301-0659) - Lowry Flying Service Inc. Photo taken Oct. 31, 2010 Belle Glade State Mun. Airport - Belle Glade, FL - USA (X10 / KX10) Photo © Marcel Siegenthaler

The Air Tractor AT-300 is a family of agricultural aircraft that first flew in the United States on September 1973. Type certification was awarded to Air Tractor in November the same year, and serial production commenced in 1976. Of low-wing monoplane taildragger configuration, they carry a chemical hopper between the engine firewall and the cockpit.

Variants

• AT-300 - prototype and early production models with Pratt & Whitney R-985 engine and 320 US gal (1,200 L) hopper
• AT-301 - main production model with Pratt & Whitney R-1340 engine
• AT-301B - AT-301 with 350 US gal (1,320 L) hopper
• AT-302 - turboprop version with Lycoming LTP101 engine
• AT-302A - AT-302 with 385 US gal (1,460 L) hopper

Specifications (AT-301A)

General characteristics
Crew: one pilot
Capacity: 320 US gal (1,210L) hopper
Length: 27 ft 0 in (8.23 m)
Wingspan: 45 ft 1¼ in (13.75 m)
Height: 8 ft 6 in (2.59 m)
Wing area: 270 ft2 (25.08 m2)
Empty weight: 3,800 lb (1,723 kg)
Gross weight: 7,400 lb (3,492 kg)
Powerplant: 1 × Pratt & Whitney R-1340 radial engine, 600 hp (447 kW)

Performance
Maximum speed: 168 mph (270 km/h)
Range: 540 miles (869 km)
Rate of climb: 1,600 ft/min (8.1 m/s)