Grumman G-73

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Grumman G-73 Mallard
Grumman G-73 from a private owner.  The machine pictured was destroyed in an accident on January 26, 2017.
Type: twin-engine amphibious aircraft
Design country:
Manufacturer:

Grumman Aerospace Corporation

First flight:

April 30, 1946

Commissioning:

1946

Production time:

until 1951

Number of pieces:

59

The Grumman G-73 Mallard ( German  Mallard ) is a twin-engine amphibious aircraft of the US American manufacturer Grumman .

history

The pattern is based on the smaller Goose and Widgeon types and took off on its maiden flight on April 30, 1946 . The shoulder decker has a nose wheel retractable landing gear . The engines are installed above and in front of the wing to protect them from splashing water. The boat hull was designed in two stages; Additional tanks can be attached to the wing tips. Between 1946 and 1951, a total of 59 copies were produced, most of which were used as business and private aircraft with appropriate saloon facilities. Only a few served as a commercial aircraft, for example at Chalk's Ocean Airways .

A number of these machines are still in use today. In 2001, 32 copies were still registered in the USA. The radial engines were common in these machines since the early 1970s by Pratt & Whitney Canada PT-6-34 - Turboprop -Triebwerke with 551 kW power and modern Hartzell replaced propellers. The first conversions were carried out by Frakes Aviation, with the first machine taking off on its maiden flight in 1969 and receiving its approval in October 1970. These machines are known as the Turbo Mallard or G-73T . The seating was changed so that there is room for 17 passengers. The largest operator with four machines of this type was Chalk's Ocean Airways until it lost its flight license on September 30, 2007.

operator

Civil operator

United StatesUnited States United States
AustraliaAustralia Australia
CanadaCanada Canada

Military users

Egypt 1922Egypt Egypt

Incidents

  • On August 3, 1955, a Pacific Western Airlines Mallard ( aircraft registration number CF-IOA ) disappeared between Kemano and Kitimat ( British Columbia ). The search was stopped after a month. Three years later, on July 23, 1958, the wreck was found at an altitude of around 1,500 meters near Kemano. All 5 occupants, two pilots and three passengers, were killed.
  • On 20 December 2005 Mallard of Chalk's Ocean Airways due to inadequate maintenance and lack of supervision fell by the FAA after the demolition of a wing on the way to the Bahamas near Miami Beach from (see also Chalk's-Ocean Airways Flight 101 ) .
  • On January 26, 2017 at 5:03 p.m. local time, a Mallard with the aircraft registration VH-CQA crashed into the Swan River from a low altitude and from a steep curve during a demonstration for the Australian National Day ( Australia Day ) in Perth . Two people were killed in the accident.

Technical specifications

Parameter Data
crew 2
Passengers 10
length 14.70 m
span 20.30 m
height 5.72 m
Wing area ? m²
Empty mass 3969 kg
Max. Takeoff mass 6350 kg
Cruising speed 291 km / h
Top speed 364 km / h
Service ceiling 7500 m
Range 2070 km
Engines 2 × radial engines Pratt & Whitney R-1340 with 410 kW (557 PS), or
modernized with 2 × turboprop engines Pratt & Whitney Canada PT6 A-34 with 450 kW (612 PS) each

Comparable types

literature

  • Thruelsen, Richard. The Grumman Story . New York: Praeger Publishers, Inc., 1976. ISBN 0-275-54260-2 .
  • Winchester, Jim, ed. "Grumman Goose / Mallard." Biplanes, Triplanes and Seaplanes (The Aviation Factfile) . Rochester, Kent, UK: Grange Books plc, 2004. ISBN 1-84013-641-3 .

See also

Web links

Commons : Grumman G-73  - Collection of Images, Videos and Audio Files

Individual evidence

  1. FliegerRevue November 2010, p. 68, Grumman G-73T Tubo Mallard
  2. ^ Accident report Grumman Mallard CF-IOA , Aviation Safety Network (English), accessed on February 4, 2020.
  3. Air-Britain Archive: Casualty compendium part 64 (English), March 1997, pp. 97/25.