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 (newspaper) Guru Maharaj Ji, who visited Denver and established a mission there in late 1971. Contributors to "Chinook" included Chip Berlet. Chinook (newspaper) Chinook was a counterculture underground newspaper published weekly in Denver, Colorado from Aug. 21, 1969 to Jan. 21, 1972. It was a member of the Underground Press Syndicate. A total of 117 issues were printed. In 1972 it merged with "Boulder" magazine to become "The Straight Creek Journal", which considered itself an alternative press rather than an underground press publication, publishing weekly from Feb. 10, 1972 to Aug. 7, 1980. According to Abe Peck in his memoir "Uncovering