Weatherly 620
A Weatherly 620B in 1998
Role Agricultural aircraft
National origin United States
Manufacturer Weatherly Aircraft Company
First flight 1979
Number built 155
Developed from Weatherly 201

The Weatherly 620 is a 1970s American agricultural monoplane designed and built as an improved variant of the Weatherly 201 by the Weatherly Aircraft Company of McClellan, California.[1]

Design

The Weatherley 620 is an all-metal single-seat low-wing cantilever monoplane with a conventional landing gear with a tailwheel. Examples have been fitted with a Pratt & Whitney R-985 radial engine, and PT6A or TPE331 turboprop engine, driving a three-bladed tractor propeller. In the forward fuselage, the aircraft has a either a 355 US gallon hopper or a 320 US gallon hopper that feeds an agricultural dispersal system. Most pilots that fly the weatherly aircraft, prefer the 320 gallon hopper aircraft. [1]

Variants

Model 620
1979 initial production variant.
Model 620A
1987 production variant with a Pratt & Whitney R-985 radial engine.
Model 620B
1992 production variant with a Pratt & Whitney R-985 radial engine.
Model 620TP
1980 turboprop variant with a Pratt & Whitney PT6A-11AG.
Model 620B-TG
1997 improved turboprop variant to replace the 620TP with a Honeywell TPE331 turboprop.

Specifications (620BTG)

Side view of Weatherly 620B

Data from Jane's All The World's Aircraft 2004-05 [1]

General characteristics

  • Crew: 1
  • Capacity: 355 US Gallons (1344litres) hopper
  • Length: 29 ft 8 in (9.04 m)
  • Wingspan: 46 ft 8 in (14.22 m)
  • Height: 9 ft 6 in (2.90 m)
  • Wing area: 277 sq ft (23.1 m2)
  • Empty weight: 3,030 lb (1,374 kg)
  • Max takeoff weight: 6,000 lb (2,721 kg)
  • Powerplant: 1 × Honeywell TPE331 turboprop, 500 hp (373 kW)

Performance

  • Cruise speed: 122 kn (140 mph, 226 km/h)
  • Stall speed: 62 kn (72 mph, 115 km/h)
  • Never exceed speed: 153 kn (176 mph, 283 km/h)
  • Service ceiling: 15,000 ft (4,572 m)
  • Rate of climb: 1,400 ft/min (7.1 m/s)


References

Notes
  1. 1 2 3 Jackson 2004, p. 801
Bibliography
  • Jackson, Paul, ed. (2004). Jane's All the World's Aircraft 2004-2005. Coulsdon, Surrey, United Kingdom: Jane's Information Group. ISBN 0-7106-2614-2.
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