Air Tractor series
- CountryUnited States of America
- TypeSeries of piston & turboprop powered agricultural aircraft
- PowerplantsAT-301 - One 447kW (600hp) Pratt & Whitney R-1340 radial engine driving two blade Hamilton Standard or Pacific Propeller or three blade Pacific Propeller props. AT-502 - One 507kW (680shp) Pratt & Whitney Canada PT6A series turboprop, optionally a 560kW (750shp) PT6A, driving a three blade constant speed prop. AT-802 - One 1062kW (1424shp) PT6A-67R or 67AF driving a five blade constant speed Hartzell prop.
- PerformanceAT-301 - Max speed 266km/h (144kt), econ cruising speed 225km/h (122kt). Initial rate of climb 1600ft/min. AT-502 - Max speed at sea level 290kmh (155kt), typical operating speeds 195 to 235km/h (105 to 125kt). Initial rate of climb 1080ft/min. AT-802 - Max speed 338km/h (182kt), max cruising speed 314km/h (170kt). Initial rate of climb 800ft/min. Range with max fuel 805km (434nm).
- WeightsAT-301 - Empty 1656kg (3650lb), loaded 3130kg (6900lb). AT-502 - Empty 1870kg (4123lb), max takeoff 4175kg (9200lb). AT-802 - Empty equipped 2860kg (6300lb), max takeoff 7260kg (16,000lb).
- DimentionsAT-301 - Wing span 13.75m (45ft 2in), length 8.23m (27ft 0in), height 2.59m (8ft 6in). Wing area 25.1m2 (270sq ft). AT-502 - Wing span 15.24m (50ft in), length 9.91m (32ft 6in), height 2.99m (9ft 10in). Wing area 27.9m2 (300.0sq ft). AT-802 - Wing span 17.68m (58ft 0in) length 11.07m (36ft 4in), height 3.35m (11ft 0in). Wing area 36.3m2 (391.0sq ft).
- CapacityOne pilot and for AT-503A and AT-802 passenger or observer. Various size chemical spray hoppers, ranging in capacity from 1210 litres (AT-301) and 1515 litres (AT-401) upwards.
- ProductionOver 1500 Air Tractors of all models have been built, including more than 600 AT-301s, 245 AT-401s, 200 AT-402s, 400 AT-502s and 50 AT-802s and AT-802As.
The Air Tractor was dveloped by organizer of company Leyland Snow who had prior outlined the Snow S-2 version (assembled by Rockwell and Ayres).
The introductory Air Tractor model was the Pratt & Whitney R-1340 spiral controlled AT-301 which secured the Air Tractor arrangement's essential setup. To begin with, the first flight was in 1973, and 600 units were assembled. The Pt6 turbine fueled AT-302 presented in 1977 was supplanted by the AT-402. The R-1340 controlled AT-401 presented a more noteworthy compass wing and expanded synthetic container limit and first flew in 1986. The AT-402 is comparative other than its 505kw (680shp) Pt6a turboprop motor, the AT-402b has expanded compass wings.
The AT-502a (first flight Feb 1992) has its roots in the 402b however it has a much more effective 820kw (1100shp) Pt6a-45r turbine driving a moderate turning five sharpened steel prop. Its overabundance force stores permit fast or high height operations. The AT-502b has Hoerner wingtips and discretionary gear including GPS.
The 5.4 ton MTOW Pt6 controlled AT-602 first flew on December 1 1995 and became accessible for conveyance in 1996.
The bigger and heavier two seat AT-802 and single seat AT-802a are the biggest single motor ag flying machine in manufacture. First flight was in October 1990. The AT-802f is a devoted firefighting variant.
Pictures of Air Tractor series
