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Grumman G.73 Mallard


The Mallard was Grumman’s entry into the civilian/commercial use amphibian category. Based on the smaller Goose and Widgeon designs, the larger G73 featured tricycle landing gear. Only 59 Mallards were ever built, but some saw a new life as a turboprop with Pratt & Whitney PT6A out front. A supplemental type certificate was issued for the kerosene burning versions in 1960, but even the performance boost delivered by the more powerful engines was not enough to keep the Mallards in service.

Only 59 were built.


Engines: 2 x Pratt & Whitney R-1340 Wasp Junior, 600 hp.
Gross wt. 12,750.
Empty wt. 8,750.
Max Speed 187-191 kts.
Cruise 157-187 kts.
Initial climb rate 1,290-1,350 fpm.
Range 1,655 nm.
Ceiling 23,000-24,500 ft.
Cruise: 160 mph.
Pax cap: 12.


Engines: 2 x Pratt & Whitney PT6A turboprop.
Seats: 12



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