De Havilland Canada DHC-6 Twin Otter - Variants

Variants

DHC-6 Series 100

Twin-engined STOL utility transport aircraft, powered by two 550 shp (432 kW) Pratt & Whitney Canada PT6A20 turboprop engines.

DHC-6 Series 110

Variant of the Series 100 built to conform to BCAR (British Civil Air Regulations)

DHC-6 Series 200

Improved version.

DHC-6 Series 300

Twin-engined STOL utility transport aircraft, powered by two 620 shp (462 kW) Pratt & Whitney Canada PT6A-27 turboprop engines.

DHC-6 Series 300M

Multi-role military transport aircraft. Two of these were produced as "proof-of-concept" demonstrators

DHC-6 Series 310

Variant of the Series 300 built to conform to BCAR (British Civil Air Regulations)

DHC-6 Series 320

Variant of the Series 300 built to conform to Australian Civil Air Regulations

DHC-6 Series 300S

Six demonstrator aircraft fitted with 11 seats, wing spoilers and an anti-skid braking system.

DHC-6 Series 400

First delivered in July 2010, powered by two Pratt & Whitney Canada PT6A-34 or optional PT6A-35 Hot & High Performance engines, and available on standard landing gear, straight floats, amphibious floats, skis, wheel skis, or intermediate flotation landing gear.

CC-138

Twin-engined STOL utility transport, search and rescue aircraft for the Canadian Forces.

UV-18A

Twin-engined STOL utility transport aircraft for the U.S. Army Alaska National Guard. Six built. It has been replaced by the C-23 Sherpa in US Army service.

UV-18B

Parachute training aircraft for the United States Air Force Academy. The United States Air Force Academy's 98th Flying Training Squadron maintains three UV-18s in its inventory as freefall parachuting training aircraft, and by the Academy Parachute Team, the Wings of Blue, for year-round parachuting operations.

UV-18C

United States military designation for three Viking Air Series 400s ordered in 2012.