Viking Air has flown its prototype DHC-6 Twin Otter Series 400, an improved version of the 19-passenger twin turboprop that is returning to production after a 20-year gap. The Series 400 technology demonstrator made its first flight from Victoria, British Columbia on Oct. 1, fitted with more-powerful Pratt & Whitney Canada PT6A-34 engines and Wipline 1300 amphibious floats. The demonstrator will be used to obtain supplemental type certification of the varuous improvements Viking ...

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