Tandem-rotor aircraft
Videos
A tandem-rotor aircraft is an aircraft with two large helicopter rotor assemblies mounted one in front of the other in the horizontal plane. This configuration is mainly used for large cargo helicopte
Boeing Vertol CH-46 Sea Knight
Columbia Helicopters Boeing Vertol 107-II and Boeing 234
A Piasecki H-21B in the early 1960s
A Yakovlev Yak-24 at Central Air Force Museum
Coaxial-rotor aircraft
Videos
A coaxial-rotor aircraft is an aircraft whose rotors are mounted on concentric shafts with the same axis of rotation but turn in opposite directions. This is done to offset the yawing movement that on
Tandem-rotor aircraft
…helicopters need a mechanism to neutralize the yawing movement produced by the single large rotor. This is commonly accomplished by a tail rotor, coaxial rotors, and the NOTAR systems. Tandem-rotor helicopters, however, use counter-rotating rotors, with each cancelling out the other's torque. Therefore, all of…
A Ukrainian Navy Kamov Ka-27
Gyroplane-Laboratoire
Dixon helicopter
A QH-50 conducts flight tests off the USS Nicholas