avia.wikisort.org - Helicopter

The Gyrodyne GCA-2 was a general-purpose helicopter built by the Gyrodyne Company of America in the late 1940s.

Development

In 1946 the newly formed Gyrodyne Company acquired rights to the Bendix Model J and developed it into the GCA-2 (N74101). The GCA-2 was of all-metal construction, and had a coaxial twin rotor layout, with a five-seat cabin and a rounded fuselage with twin fins. Later on, the GCA-2 was designated GCA-2A Helidyne after being modified with twin 100hp Continental auxiliary engines mounted externally on strutted outriggers to give additional forward speed, flying on November 30, 1949. A second GCA-2 airframe, the GCA-2C (civil registration N6594K), first flew on April 25, 1952 piloted by Jim Ryan; it could also be used as an ambulance helicopter capable of carrying three litters.[1][2][3]

Specifications (GCA-2C)

Data from Jane's All the World's Aircraft 1952–53[4]

General characteristics

• Crew: 1
• Capacity: 5 passengers
• Height: 14 ft 4 in (4.37 m)
• Empty weight: 3,600 lb (1,633 kg)
• Gross weight: 5,400 lb (2,449 kg)
• Powerplant: 1 × Pratt & Whitney R-985-B4 Wasp Junior
• Main rotor diameter: 2 × 48 ft (15 m)
• Main rotor area: 3,619 sq ft (336.2 m²)

Performance

• Maximum speed: 110 mph (180 km/h, 96 kn)
• Cruise speed: 89 mph (143 km/h, 77 kn)
• Combat range: 270 mi (430 km, 230 nmi)
• Service ceiling: 7,000 ft (2,100 m) (vertical flight)
• Rate of climb: 1,460 ft/min (7.4 m/s)

References

• Bridgman, Leonard (1952). Jane's All the World's Aircraft 1952–53. London: Sampson Low, Marston & Company, Ltd.

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