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DHC-6 Twin Otter de Havilland Canada
DHC-6 Twin Otter
Regional Airliner
Regional Transport

DESCRIPTION:
Building on its DHC-3 Otter single-engine transport, de Havilland Canada announced the development of the twin-engine DHC-6 in 1964. Carrying 13 to 18 passengers, the Twin Otter was optimized for short-range routes where short takeoff and landing abilities were important. The DHC-6 can be equipped with standard wheel landing gear as well as skis or floats for operations on snow and water. This versatility has not only attracted a variety of civil operators, but also many customers in military services and other government agencies. The aircraft has also proven popular with research institutions like NASA and NOAA.

The principal models include the original Series 100, a heavier Series 200, and the Series 300 with uprated engines and room for up to 20 passengers. Specialized military versions have also been built, optimized for duties such as armed transport and maritime reconnaissance. Production of the Twin Otter ended in 1988 after 844 and been built, and a replacement called the DHC-9 has been under study. Nevertheless, the Twin Otter has remained so popular that the Canadian company Air Viking purchased the production rights and announced it would restart manufacturing of an improved Series 400 model in 2008.

Data below for DHC-6 Series 300
Last modified 14 May 2010

HISTORY:
First Flight (Series 100) 20 May 1965
(Series 400) 1 October 2008
Service Entry

1966

CREW: two: pilot, co-pilot

PASSENGERS: (typical) 18-20
(Series 300) 20 in one-class

ESTIMATED COST:

unknown

AIRFOIL SECTIONS:
Wing Root NACA 63A516 mod
Wing Tip NACA 63A516 mod

DIMENSIONS:
Length 51.75 ft (15.77 m)
Wingspan 65.00 ft (19.81 m)
Height 19.50 ft (5.94 m)
Wing Area 420 ft² (39.02 m²)
Canard Area

not applicable

WEIGHTS:
Empty 7,415 lb (3,365 kg)
Normal Takeoff unknown
Max Takeoff 12,500 lb (5,670 kg)
Fuel Capacity internal: 2,500 lb (1,135 kg)
external: not applicable
Max Payload

2,500 lb (1,135 kg)

PROPULSION:
Powerplant two Pratt & Whitney Canada PT6A-27 turboprops
Thrust 1,304 ehp (942 ekW)

PERFORMANCE:
Max Level Speed at altitude: 215 mph (340 km/h) at 10,000 ft (3,050 m)
at sea level: unknown
Initial Climb Rate 1,600 ft (490 m) / min
Service Ceiling 26,700 ft (8,140 m)
Range typical: 700 nm (1,295 km)
max payload:100 nm (185 km)
g-Limits unknown

KNOWN VARIANTS:
Series 100 First production model with a short nose; 115 built
Series 200 Model with a longer nose, increased baggage capacity, and higher maximum takeoff weight; 115 built
Series 300 Improved Series 200 model with uprated engines and greater maximum takeoff weight, later models able to carry up to 20 passengers
Series 300M Military transport built in two versions: basic model and counter-insurgency model equipped with machine guns and underwing pylons
Series 300MR Maritime reconnaissance model featuring a search radar; 1 built for Senegal
Series 300S Model with 11 seats and improved STOL features for use in small inner-city airports; 6 built
Series 400 Proposed improved model to meet more stringent US noise requirements; not built
Series 400 Revived production model manufactured by the Canadian firm Viking Air with a new PT6A-34/35 engine; at least 40 to be built
CC-138 Search-and-rescue model used by the Canadian military
UV-18A Command transport based on the Series 300 model and used by the US Army; 6 built
UV-18B Parachuting model based on the Series 300 and used by the US Air Force Academy; 2 built

KNOWN OPERATORS:
Civil AAI
Adlair Aviation
Aerolinea de Antioquia (ADA)
Aeroperlas
Aerovias DAP
Aero Zambia
Air Alpes
Air America
Air BC
Air Burundi
Aircalin
Air Djibouti
Air Ecosse
Air Greenland
Air Iceland
Air Limousin Travail Aérien (ALTA)
Airlines PNG
Air Madagascar
Air Moorea
Air Pacific
Air Panama
Air São Tomé and Príncipe
AirSea Lines
Air Sénégal
Air Seychelles
Air Tindi
Air Turks & Caicos
Air Vendée
Air West
Alaska Airlines
Aloha Island
Aurigny
Brymon
Cameroon Airlines
Carib Aviation
Cayman Airways
China Flying Dragon Aviation
Continental Express
CrownAir
Crown Airways
Dorado Wings
Eagle Air (Iceland)
Eastern Metro Express/Metro Airlines (USVI)
Emirates
Era
Evergreen Helicopters
Flugfélag Norðurlands
Fraser Valley
Grand Canyon Airlines
GT Air
Gulf Air
Harbour Air
Intermountain Aviation
Isles of Scilly Skybus
Jersey European
Kenn Borek Air
Lab Air
Labrador Airways
La Ronge
Lake Union
Lina Congo
Loganair
Malaysian Airline System (MAS)
Maldivian Air Taxi
MASWings
Manx
Merpati Nusantara Airlines
Metro Airlines
Metropolitan
Mountainwest
Nature Air
Nepal Airlines
NorOntair
NT Air
Pacific Sun
Pilgrim Airlines
Ptarmigan
Raecom
Rio
Royal Nepal Airlines
Seaborne Airlines
Shawnee Airlines
Solomon Airlines
St. Lucia Airways
SCAT
Scenic
Schreiner Airways
Schreiner Airways Cameroon
Skybus
Skydive
Spacegrand
Swedair
Talair
Touraine Air Transport (TAT)
Trigana Air Service
Trans Maldivian Airways
Trans Provincial
UNICEF
Unitair
US Air Express
Vaengir
Walker's Cay
West Coast
West Flight
Wiggins Airways
Windward Islands Airways International
Yeti Airlines
Government/Military Afghanistan
Argentina (Air Force, Army, Navy)
Australia
Benin
British Antarctic Survey
Canada
Chile
Colombia
Dominican Republic
Ecuador
Ethiopia
France (Air Force, Army)
Haiti
Jamaica
Malaysia
National Aeronautics & Space Administration (NASA)
National Oceanic and Atmospheric Administration (NOAA)
Nepal
Netherlands
Norway
Panama
Paraguay
Peru
Senegal (300MR)
Sudan
Switzerland
Uganda
United States (Air Force, Army)
Venezuela
Vietnam (Navy)

3-VIEW SCHEMATIC:

DHC-6 Twin Otter


SOURCES:
  • Aboulafia, Richard. Jane's Civil Aircraft. Glasgow: Harper Collins Publishers, 1996, p. 112-113, De Havilland Canada DHC-6 Twin Otter.
  • Donald, David, ed. The Complete Encyclopedia of World Aircraft. NY: Barnes & Noble, 1997, p. 330-331, de Havilland Canada DHC-6 Twin Otter.
  • Donald, David, ed. The Encyclopedia of Civil Aircraft. San Diego, CA: Thunder Bay Press, 1999, p. 360-365, de Havilland Canada DHC-6 Twin Otter.
  • Donald, David and Lake, Jon, ed. The Encyclopedia of World Military Aircraft. NY: Barnes & Noble, 2000, p. 146, de Havilland Canada DHC-6 Twin Otter.
  • Gunston, Bill, ed. The Encyclopedia of Modern Warplanes. NY: Barnes & Noble, 1995, p. 108, de Havilland Canada DHC-6 Twin Otter.
  • Rendall, David. Jane's Aircraft Recognition Guide, 2nd ed. London: Harper Collins Publishers, 1999, p. 278, De Havilland Canada DHC-6 Twin Otter.





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