Grumman G-21 Goose

Grumman G-21 Goose
Paese	Usa
Ruolo	Trasporto di aeromobili anfibi
Primo volo	1937
Costruito	345

Le Oca Grumman G-21 È un aereo da volo anfibio progettato da Grumman per servire come aereo "pendolare" da otto posti per uomini d'affari nella zona di Long Island. L'Goose fu il primo monoplano grumman a volare, il suo primo aereo bimotore e il suo primo aereo ad entrare nel servizio di compagnia aerea commerciale. Durante la seconda guerra mondiale, l'Oca divenne un trasporto efficace per l'esercito statunitense (inclusa la Guardia Costiera degli Stati Uniti), oltre a servire con molte altre forze aeree. Durante le ostilità, l'Oca assunse un numero crescente di ruoli di combattimento e addestramento.

fonte: Grumman G-21 Goose su Wikipedia

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Localisation	Unknow
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General Characteristics and Role

The Grumman G-21 Goose is an American amphibious aircraft developed in the mid-1930s. It was the first monoplane designed by Grumman to enter commercial service. Originally built as a comfortable “commuter” for wealthy businessmen in the Long Island area who needed a reliable way to fly between their estates and New York City, the Goose quickly proved its versatility. Its ability to land on both water and land (thanks to its retractable landing gear) made it highly valued. During World War II, the Goose was adopted by the US military (as the JRF in the Navy/Coast Guard and OA-9 in the Army Air Forces) and the UK’s Royal Air Force for roles including anti-submarine patrol, search and rescue (SAR), and utility transport.

Property	Typical Value (G-21A)
Ruolo	Amphibious Utility Transport / Patrol Bomber
National Origin	Stati Uniti
Produttore	Grumman Aircraft Engineering Corporation
First Flight	29 May 1937
Equipaggio	1–2 (Pilot, Co-Pilot)
Capacity (Passengers)	5–7 passengers
Lunghezza	11.74 m (38 ft 6 in)
Apertura alare	14.94 m (49 ft 0 in)
Altezza	4.93 m (16 ft 2 in)
Empty Weight	2,437 kg (5,375 lb)
Max Takeoff Weight	3,402 kg (7,500 lb)

Powerplant and Performance

Engine: 2 x Pratt & Whitney R-985 Wasp Junior nine-cylinder, air-cooled radial engines.
Power Output (Total): 670 kW (900 hp).
Propeller: Hamilton Standard constant-speed propellers.
Maximum Speed: 324 km/h (201 mph; 175 kn).
Cruise Speed: 305 km/h (190 mph).
Range: 1,030 km (640 mi; 560 nmi).
Service Ceiling: 6,400 m (21,000 ft).

Design and Unique Characteristics

Hull: All-metal monocoque hull for water operations.
Amphibious Gear: Features fully retractable landing gear, with the main wheels retracting into the side of the hull. The retractable gear provides versatility but adds complexity and weight.
Legacy: The Goose established Grumman as a major player in aviation and led to a line of successful amphibian aircraft, including the larger Mallard and Albatross.
Post-War Service: Many surplus military JRFs were converted back to civilian G-21s, seeing long service in Alaska, Canada, and the Caribbean as regional airliners.