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 Observer of the family that owns the EO Media Group, who served as publisher for 28 years. In 2017 Kari Borgen succeeded Pero in that role. As of 2018 the paper's circulation was 6700. The original Linotype machine, a Mergenthaler, was taken out of service in the 1970s and is on loan to the Columbia Pacific Heritage Museum in Ilwaco, Washington. Chinook Observer The Chinook Observer is a weekly newspaper serving the Long Beach Peninsula of Washington state. It is named after Chinook, Washington, where the paper was founded in 1900 by George Hibbert and Frank Gaither. Hibbert sold the paper