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]

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

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)

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

Bibliography

External links

Wikimedia Commons has media related to Weatherly 620.

• TYPE CERTIFICATE DATA SHEET NO. A26WE