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 Sciences of Chinook Energy was appointed to the U.S. Department of Commerce’s renewable Energy & Energy Advisory Committee. February 2011 saw Chinook Sciences further expand in the UK with a substantial industrial warehouse in Lenton, Nottingham. It was then announced in October 2011 that Chinook Sciences would expand its UK office space in Nottingham Science Park from 15,000 sq ft to 20,500 sq feet. The new space was announced to fulfil Chinook Sciences’ need to expand and upgrade the remote command and control station used to support their partner facilities. Chinook Sciences announced the appointment of Harry W. Zike as Chief