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DHC-6 Twin Otter
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DHC-6 Twin Otter

DHC-6 Twin Otter

 

DHC-6 Twin Otter, turboprop aircraft developed by «de Havilland Canada» having a shorter takeoff and landing, and intended for passenger traffic on domestic airlines.

Excellent take-off and landing performance, the ability to land on a suitable landing area, as well as the ability to install the chassis wheelbase, ski or float base made DHC-6 Twin Otter versatile light transport aircraft.

In November 1963, the company «de Havilland Canada» started work on designing a twin-engined variant of aircraft DHC-3 Otter. Get in a subsequent designation - DHC-6. Construction of the first prototype DHC-6, began in July 1964 years.

DHC-6 Twin Otter snow

The appearance of the aircraft has changed. The bow was redone. The wing span of the aircraft was increased. The aircraft was equipped with two turboprop engines Pratt & Whitney Canada PT6A power 550 hp. each. The aircraft was shaped like a monoplane with a high wing with a two-slot flap design. The fuselage of the aircraft is all-metal with a cruciform tail unit. The chassis of the aircraft consists of three non-retractable racks, which, if necessary, can be equipped with floats, skis, conventional or "tundra" wheels. The new aircraft, like its predecessor, DHC-3, turned out to be reliable, unpretentious in operation and simple in maintenance with an airplane with a short take-off and run distance.

For the first time DHC-6 climbed to the sky 20 May 1965 from Downsweeth Airport in Ontario. During all tests the aircraft showed excellent performance. After all the tests, serial production of the aircraft began. The first serial version of the aircraft, designated the DHC-6 Series 100, was received by Trans Australia Airlines. Production of the DHC-6 Series 100 continued until April of the year 1968. In total, 115 aircraft of this series were built. After that the company de Havilland Canada started work on the production of DHC-6 Series 200. The "two-hundredth" series differed from the previous series, an elongated nose in which an additional luggage compartment was placed, as well as an enlarged rear cargo compartment.

DHC-6 Twin Otter salon 34

Starting with 1969 years, began production of aircraft DHC-6 Series 300. In this series of aircraft it has increased fuel capacity and installed new, more powerful turboprop engines Pratt & Whitney Canada RT6A-27. The capacity of each engine was 620 hp Also there was a possibility of installation of additional fuel tanks on the wingtips. On the left side of the aircraft it was established two-folding cargo door and a separate door to the cockpit. The nose section was the same as at the Series 200, except for the water version with floats, which have a shorter nose of Series 100.

In 1988 the production of aircraft DHC-6 was discontinued. But in the middle of the year 2007 Aircraft company «Viking Air» continued construction of these aircraft under the designation DHC-6 Twin Otter Series 400.

On the planes of this series have been installed new engines Pratt & Whitney Canada PT6A-34. Also optionally, may be used motors PT6A-35.

In the construction of this series to facilitate the construction and increase the bearing capacity of composite materials have been applied. Starting with the year 2009 DHC-6 Series 400 was shipped to the airline.

DHC-6 Twin Otter was admitted into a well in the following versions:

- UV-18B - aircraft delivered in the US Air Force to practice parachute jumps.

- UV-18A - the plane is used as the light air transporter by the US Army in Alaska.

- CC-138 - search and rescue aircraft, delivered to the armed forces of Canada.

DHC-6 Series 320 - aircraft built specifically for the Australian regional airlines.

DHC-6 Series 300M - a multi-purpose military transport aircraft

DHC-6 Twin Otter Salon

Today produced 850 aircraft DHC-6 Twin Otter.

 

Technical characteristics of the aircraft DHC-6 Twin Otter

 

First flight DHC-6 Twin Otter: 20 May 1965 years

Years of production DHC-6 Twin Otter (Series 100, 200, 300): c 1965 1988 year on year

Years of production DHC-6 Twin Otter (Series 400): c 2008 years

Length: 15,77 m.

Height: 8,94 m.

Wingspan: 19,81 m.

Empty weight: 3365 kg.

Wing area: 39,02 sq.m.

Cruising speed: 265 km / h..

Maximum speed: 340 km / h..

Ceiling: 8140 m.

Range: 1700 km.

Engines: 2 theater x Pratt & Whitney PT6A-27

Crew: 1-2 people

Number of seats: 20 places

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