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.
Appearance of the plane has been changed. The nose section was redone. The wingspan of the aircraft has been increased. On the airplane was equipped with two turboprop engines Pratt & Whitney Canada RT6A power 550 hp each. The plane was a form braced high-wing monoplane with a double-slit design of the flap. Fuselage-metal Phillips tail. The chassis of the aircraft consists of three non-retractable racks that can optionally be fitted with floats, skis, conventional or "tundra" wheels. The new aircraft, like its predecessor, DHC-3, turned a reliable, low-maintenance operation and easy maintenance with a small plane distance run and run.
DHC-6 first took to the skies 20 May 1965 year Downsview Airport in Ontario. During all test aircraft demonstrated excellent performance. After all the tests, the serial production of the aircraft. The first production version of the airplane, designated DHC-6 Series 100, entered the airline «Trans Australia Airlines». Production DHC-6 Series 100 lasted until April 1968 years. It was built 115 aircraft of this series. Then the company «de Havilland Canada» started working on the production DHC-6 Series 200. "Hundred" series different from the previous series, elongated nose, which was published by an additional luggage compartment, as well as increasing the volume of the rear luggage compartment.
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
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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