Boeing engine started in 1943 and Boeing's gas turbines were designated models 502 (T50), 520 (T60), 540, 551 and 553. Boeing built 2,461 engines before production ceased in April 1968. Many applications of the Boeing gas turbine engines were considered to be firsts, including the first turbine-powered helicopter and boat. Vertol Aircraft Corporation was acquired by Boeing in 1960, and was reorganized as Boeing's Vertol division. The twin-rotor CH-47 Chinook, produced by Vertol, took its first flight in 1961. This heavy-lift helicopter remains a work-horse vehicle to the present day. In 1964, Vertol also began production of the CH-46 Sea Knight.
Chinook Jargon Chief Maquinna and his brother Callicum performing a theatrical using mock English and mock Spanish words and mimicry of European dress and mannerisms. There evidently was a Jargon in use in the Queen Charlotte, but this "Haida Jargon" is not known to have shared anything in common with Chinook Jargon, or with the Nooktan-Chinookan "proto-jargon" which is its main foundation. Pacific Northwest historians are well acquainted with the Chinook Jargon, in name if not in the ability to understand it. Mentions of and phrases of Chinook Jargon were found in nearly every piece of historical source material before 1900. Chinook