Yes, some newer Twin Otter aircraft do have a wire running from the top of the cockpit to the top of the tail, as do some legacy Twin Otter aircraft. That wire is a high-frequency (HF) antenna, which allows the flight crew to use an HF radio.
The Twin Otter Series 400 is the culmination of contributions from many sources in Canada and the United States, with the majority of the primary structure and detail parts manufactured at the Viking factory in Victoria, British Columbia.
Since Viking revived production of the Twin Otter aircraft in 2010 up to and including 2015, 84 Series 400 aircraft have been delivered and put into operation worldwide. These 84 Series 400 Twin Otters have been delivered to 31 operators in 29 countries.
There is no single agreed upon “best” or “safest” colour for an airplane. Many larger aircraft operators paint their planes with company brands, logos or themes, while smaller operators will often paint based on their own interests.
Viking Air Ltd. is the global leader in utility aircraft services and manufacturer of Series 400 and Guardian 400 Twin Otter aircraft. Winner of the James C. Floyd award for outstanding contributions to Canadian aerospace, Viking celebrates its 50th anniversary in 2020. Viking is the Original Equipment Manufacturer (OEM) and Type Certificate holder for all out-of-production De Havilland Canada aircraft and the Canadair Amphibious Aerial Firefighting aircraft fleet.
Longview Aviation Capital, through its subsidiaries, holds the Type Certificates for the entire original product line of the De Havilland Aircraft of Canada Company. Together these companies continue to make strides in manufacturing and modernizing versatile, fuel efficient and environmentally responsible turboprop aircraft for use around the world.