Helicopter rotor of gravity fore-aft. However, it requires the expense of two large rotors rather than the more common one large main rotor and a much smaller tail rotor. The Boeing CH-47 Chinook is the most common tandem rotor helicopter. Coaxial rotors are a pair of rotors mounted one above the other on the same shaft and turning in opposite directions. The advantage of the coaxial rotor is that, in forward flight, the lift provided by the advancing halves of each rotor compensates for the retreating half of the other, eliminating one of the key effects of dissymmetry of lift: retreating blade
Chinook, Montana by its community. Chinook, Montana Chinook is a city in and the county seat of Blaine County, Montana, United States. The population was 1,203 at the 2010 census. Points of interest are the Bear Paw Battlefield Museum located in the small town's center and the Bear Paw Battlefield, located just twenty miles south of Chinook. Chinook is located at (48.5894, -109.2321). According to the United States Census Bureau, the city has a total area of , all of it land. As of the census of 2010, there were 1,203 people, 599 households, and 313 families residing in the city. The