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 Chinook words and phrases in her writing. In Oregon, Chinook Jargon was widely used by Natives, trappers, traders, employees of the Hudson's Bay Company, missionaries, and pioneers who came across the Oregon Trail from the 1830s-1870s. In Portland's first half century (1840s-1890s) there were frequent trade interactions between pioneers and Native Americans. After about 1900, when such daily interactions were less frequent, Jargon was spoken among pioneer families to prove how early they arrived out west. Many Oregonians used Jargon in casual conversation—to add humor, whimsy or emphasis and to exhibit deep knowledge of Oregon's history. Though traditions of speaking