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 interact with the First Nations people living there. The old settler families' heirs in the Pacific Northwest sent communiques to each other, stylishly composed entirely in "the Chinook". Many residents of the British Columbia city of Vancouver spoke Chinook Jargon as their first language, even using it at home in preference to English. Among the first Europeans to use Chinook Jargon were traders, trappers, Voyageurs, Coureurs des bois and Catholic missionaries. Hawaiians and American in the region made much use of it as well. In some places Kanakas married into the First Nations and non-native families and their particular mode