# Air Tractor AT-500 family

The Air Tractor AT-500 is a family of agricultural aircraft that first flew in the United States on 25 April 1986, manufactured by Air Tractor Inc. Of monoplane low-wing, taildragger configuration, they carry a chemical hopper between the engine firewall and the cockpit. Compared with their predecessor, the AT-500 family featured a wingspan increase of 50 in (12.7 cm), and an additional fuselage stretch of 22 in (56 cm), allowing for a larger chemical hopper. Almost all variants offer a widened "buddy" seat or a tandem seat for a passenger, observer, or loader; trainer aircraft with full dual controls have also been offered.
From 2011 through 2018, the AT-502B was the world's top-selling agricultural aircraft with 388 deliveries, while the combined AT-500 line (AT-502A, -502B, and -504) was among the world's most popular fixed wing general aviation single-turboprop aircraft families, with 470 delivered—a total exceeded only by the Pilatus PC-12 and the Cessna 208 Caravan family during that time.

## Variants
### AT-500

    Prototype

### AT-501

    Piston-powered version with 600 shp (450 kW) Pratt & Whitney R-1340 engine, one seat, gross weight of 6,500 lb (2,900 kg)

### AT-502

    Upgraded AT-501 with 680 shp (510 kW) Pratt & Whitney Canada PT6A-15AG or 750 shp (560 kW) PT6A-34AG engine, one or two seats, gross weight of 6,500 lb (2,900 kg) or 8,000 lb (3,600 kg) depending on production date and wing spar type

### AT-502A

    Hot and high version of AT-502 with 1,100 shp (820 kW) PT6A-65AG or 1,050 shp (780 kW) PT6A-60AG engine, one or two seats in tandem or side-by-side arrangement, gross weight of 8,000 lb (3,600 kg)

### AT-502B

    Main production version, development of AT-502 with 750 shp (560 kW) PT6A-34AG engine, one or two seats in tandem or side-by-side arrangement, gross weight of 8,000 lb (3,600 kg)

### AT-502XP

    Updated AT-502A with 867 shp (647 kW) PT6A-140AG engine

### AT-503

    Production version with 1,100 shp (820 kW) PT6A-45R engine, tandem seats, gross weight of 8,000 lb (3,600 kg)

### AT-503A

    AT-503 with 750 shp (560 kW) PT6A-34AG engine, tandem seats dual controls, AT-501 wings

### AT-503T

    Dual-control trainer version of AT-503 with shorter AT-401 wings, tandem seats

### AT-504

    Dual-control trainer version of AT-502B with side-by-side seating, replaced tandem-seat AT-503 trainers, introduced 2009

## Specifications (AT-502B)

Data from Jane's All The World's Aircraft 1988-89
General characteristics
* Crew: Two
* Capacity: *500 US gal (420 imp gal; 1,900 L) hopper
* 5,830 lb (2,640 kg) payload
* Length: 33 ft 6 in (10.21 m)
* Wingspan: 52 ft 0 in (15.85 m)
* Height: 9 ft 9+1⁄2 in (2.985 m)
* Wing area: 288.0 sq ft (26.76 m$^2$)
* Aspect ratio: 8.0:1
* Airfoil: NACA 4415
* Empty weight: 4,650 lb (2,109 kg)
* Max takeoff weight: 10,480 lb (4,754 kg)
* Fuel capacity: 260 US gal (220 imp gal; 980 L)
* Powerplant: 1 × Pratt & Whitney PT6A-34AG turboprop, 750 shp (560 kW)
* Propellers: 3-bladed Hartzell constant-speed propeller, 9 ft 3 in (2.82 m) diameter
Performance
* Maximum speed: 154 mph (248 km/h, 134 kn) at sea level
* Cruise speed: 130 mph (210 km/h, 110 kn) (ferry speed)
* Stall speed: 69 mph (111 km/h, 60 kn) (power off, flaps down) at maximum landing weight
* Range: 800 mi (1,300 km, 700 nmi)
* Service ceiling: 36,000 ft (11,000 m)
* Rate of climb: 3,500 ft/min (18 m/s)