Weatherly 201/620
- CountryUnited States of America
- TypeAgricultural aircraft
- Powerplants201C - One 335kW (450hp) Pratt & Whitney R-985 nine cylinder radial piston engine driving a two blade constant speed Hartzell propeller. 620 - Same except for a three blade constant speed prop. 620TP - One 375kW (500shp) Pratt & Whitney Canada PT6A-11AG turboprop.
- Performance201C - Typical cruising speed 170km/h (91kt). Initial rate of climb 960ft/min. 620 - Endurance 2hr 30min. 620TP - Endurance 2hr 0min.
- Weights201C - Empty 1157kg (2550lb), max takeoff restricted category 2177kg (4800lb). 620 - Empty 1270kg (2800lb), max takeoff restricted category 2495kg (5500lb), design takeoff 1815kg (4000lb). 620TP - Empty 1135kg (2500lb), max takeoff restricted category 2450kg (5400lb), design takeoff 1815kg (4000lb).
- Dimentions201C - Wing span 11.89m (39ft 0in), length 8.29m (27ft 3in), height 2.48m (8ft 2in). Wing area 23.3m2 (251.5sq ft). 620 & 620TP - Wing span 12.50m (41ft 0in), or 14.33m (47ft 0in) with optional wingtip guide vanes.
- CapacityPilot only in all models. Hopper capacity in 201C is 1022 litres (270US gal/225Imp gal); Hopper capacity in 620 is 1268 litres (335US gal/280Imp gal); Hopper capacity in 620TP is 1287 litres (340US gal/283Imp gal).
- ProductionThe three model types were built in relatively small numbers (including more than 100 Model 201s). By mid 2000 at least 155 Model 620/620TPs had been built.
The Weatherly 201 and 620 agrarian airplane were inherent moderately little numbers from the late 1960s.
The Weatherly 201 and its successors go once more to the Weatherly WM-62c rural flying machine, 19 of which were fabricated between January 1961 and late 1965. The WM-62s were farming changes of the fundamental Fairchild M-62 airframe, fitted with a substance container, spread blasts and either a Wright W-670 or Pratt & Whitney R-985 outspread motor.
Weatherly utilized its encounter within outlining and changing over the WM-62s in creating it horticultural airplane outline. The ensuing Model 201 was a bigger airplane in general of traditional ag flying machine setup, with a low wing, a Pratt & Whitney R-985 outspread, indispensable compound container and spread blasts and an encased cockpit for the pilot. The starting creation 201, the 201a, was certificated in 1967, emulated by the 201b, and the enhanced 201c was conceded its write testament in 1975. An exceptional peculiarity was the utilization of wingtip vanes which were produced to expand the powerful swath width, while lessening the measure of chemicals lost from the spreading swath (they could be collapsed again underneath the wings for shed stockpiling.
The Model 620 supplanted the 201c in creation from 1980. The 620 emphasized a more drawn out compass wing with discretionary wingtip vanes and a bigger concoction container, however the same R-985 motor. The 620a had a 65usgal fuel limit, the 620b had a 4in extended fuselage to give a 88usgal limit.
The Pratt & Whitney Canada Pt6a-11ag turboprop controlled 620tp joined the 620 in creation in 1980, and emphasized a more extended nose and a marginally bigger substance container. This 620tp was accessible as the 620a-TP and 620b-TP.
The 620b-TP was supplanted by the 620b-TG which is controlled by a 496kw (665shp) Honeywell Tpe331-1 turboprop. The 620b and 620b-TG are still in low-rate creation.