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 names throughout this region bear Jargon names (see List of Chinook Jargon placenames) and words are preserved in various rural industries such as logging and fishing. The Chinook Jargon was multicultural and functional. To those familiar with it, Chinook Jargon is often considered a wonderful cultural inheritance. For this reason, and because Jargon has not quite died, enthusiasts actively promote the revival of the language in everyday western speech. The Confederated Tribes of the Grand Ronde Community of Oregon is taking steps to preserve Chinook Jargon use through a full immersion head start/preschool which is conducted in Chinuk Wawa, in