TYPE: Agricultural sprayer.
PROGRAMME: Design started July 1989; optional configuration as firefighter; first flight of prototype (N802LS) 30 October 1990; second aircraft flew November 1991, with PT6A-45R and configured as agricultural model with spraybooms, pump and Transland gatebox. Production deliveries started second quarter 1993.
CURRENT VERSIONS: AT-802: Tandem two-seater powered by P&WC PT6A-45R; certified for gross weight of 6,804 kg (15,000 lb) 27 April 1993. PT6A-65AG and -67AG versions certified April 1993 at maximum T-O weight of 7,257 kg (16,000 lb).
AT-802A: Single-seat version; third production aircraft in this configuration; can be powered by refurbished PT6A-65AG or -67AG engine. First flight 6 July 1992; FAA certification gained 17 December 1992; certified for gross weight of 6,804 kg (15,000 lb) with PT6A-45R on 27 April 1993. PT6A-65AG versions certified March 1993 at maximum T-O weight of 7,257 kg (16,000 lb).
AT-802F: Two-seat firefighting version; PT6A-67AG engine. FAA certification at 5,670 kg (12,500 lb) maximum T-O weight 17 December 1992; certified at 7,257 kg (16,000 lb) on 27 April 1993, giving useful load of 3,987 kg (8,790 lb).
Data apply to AT-802F version, except where indicated.
CUSTOMERS: Total 157 registered by late 2003. Deliveries include 20 to Australia, 28 to Europe and eight to Canada plus two to Saudi Arabia for oil slick eradication. Total of 56 engaged in firefighting duties in six countries during 2002. Recent customers include Forest Protection Limited (EPL) of New Brunswick, Canada, which ordered six AT-802Fs, one purchased after lease during 2001, two for delivery in 2002 and three scheduled for delivery in 2003, to replace Grumman Avenger firebombers; and the US State Department's International Narcotics and Law Enforcement Division, which ordered eight AT-802s for delivery from April 2002, for drug eradication duties in Colombia in a joint programme with the Colombian National Police. These aircraft are modified with self-sealing fuel tanks, armoured engine compartments and cockpits, with bulletproof windscreens, engine fire-extinguishing systems; oxygen system, GPS and HF radios.
COSTS: Standard AT-802A US$996,500 with new PT6A-65AG; with customer-supplied PT6A-65AG or -67AG US$463,500. Standard AT-802AF US$1,245,000 with PT6A-67AG; or US$625,000 with customer-supplied PT6A-67AG. Two-seat version with dual controls US$32,500 extra (all 2003).
DESIGN FEATURES: Generally as for AT-401. Largest aircraft built by company to date; full dual controls for training; also designed for firefighting; programmable logic computer with cockpit control panel and digital display enables pilot to select coverage level and opens hydraulically operated 'bomb bay' drop doors to prescribed width, closing them when selected amount of retardant released. Drop doors adjust automatically for changing head pressure and aircraft acceleration to provide a constant flow rate and even ground coverage.
Wing aerofoil section NACA 4415; dihedral 3° 30'; incidence 2°.
FLYING CONTROLS: Manually operated ailerons, elevators and rudder with balance tabs; electrically operated Fowler trailing-edge flaps deflect to maximum 30°.
STRUCTURE: Two-spar wing of 2024-T3 light alloy with alloy steel upper and lower spar caps and bonded doubler on inside of leading-edge for impact damage resistance; ribs and skins zinc chromated before assembly; glass fibre wingroot fairing and skin overlaps sealed against chemical ingress; flaps and ailerons of light alloy. Fuselage of welded 4130N steel tube, oven stress relieved and oiled internally, with skin panels of 2024-T3 light alloy attached by Camloc fasteners for quick removal; rear fuselage lightly pressurised to prevent chemical ingress. Cantilever fin and strut-braced tailplane of light alloy, metal skinned and sealed against chemical ingress.
LANDING GEAR: Non-retractable tailwheel type. Cantilever heavy-duty E-4340 spring steel main legs, thickness 44.5 mm (1.75 in); flat spring suspension for castoring and lockable tailwheel. Cleveland mainwheels with tyre size 11.00-12 (10 ply), pressure 4.14 bar (60 lb/sq in). Tailwheel tyre size 6.00-6. Cleveland eight-piston brakes with heavy-duty discs.
POWER PLANT: One Pratt & Whitney Canada PT6A-65AG or -67AG turboprop, rated at 966 kW (1,295 shp) for -65AG and 1,007 kW (1,350 shp) for -67AG, both driving a Hartzell five-blade feathering and reversible-pitch constant-speed metal propeller. Fuel in two integral wing tanks, total usable capacity 961 litres (254 US gallons; 211 Imp gallons); optional tanks increase capacity to 1,438 litres (380 US gallons; 317 Imp gallons). Engine air is filtered through two large pleated paper industrial truck filters.
ACCOMMODATION: One or two seats in enclosed cabin, which is sealed to prevent chemical ingress and protected with overturn structure. Four downward-hinged doors, two on each side. Windscreen is safety-plate auto glass, with washer and wiper. Air conditioning system standard.
SYSTEMS: Hydraulic system, pressure 207 bar (3,000 lb/sq in).
AVIONICS: Choice of avionics suites by Bendix/King and Garmin.
Comms: Bendix/King KX 155A nav/com; KY 99A or KY 196A transceivers; KLX 135 GPS/com; KT 76A transponder; KMA 24H audio control panel; Garmin GNS 430 or GNS 530 nav/com/GPS; GTX 320 transponder; GMA 340 audio panel.
Flight: Bendix/King KT 87 ADF; KCS 55A compass; KN 64 DME.
EQUIPMENT: Two removable Derakane vinylester hoppers forward of cockpit and 227 litre (60 US gallon; 50 Imp gallon) gate tank in ventral bulge, for agricultural chemical, fire retardant or water; total capacity 3,104 litres (820 US gallons; 683 Imp gallons). Electronic spray monitoring system standard. Transland high-volume fertilising gate 0.96 x 0.25 m (3 ft 2 in x 10 in) optional.