Modeled after the U.S. Army Chinook, this is the remote controlled helicopter that flies easily even when a beginner is on the stick. Its exceptional stability is provided by two pairs of contra-rotating coaxial rotors that cancel the effects of angular momentum to keep the copter balanced during flight. Its three-channel remote provides digital proportional control of rotor speed for flights as high as 164'; trim controls provide further tuning for pitch and yaw. Faithfully depicting the iconic 1960s workhorse, its fuselage is detailed with four windows on each side and a turboshaft engine on either side of its rear rotor cowling. Its rechargeable battery provides five- to seven-minute flight times from a one-hour charge using its AC adapter. Requires four AA batteries. Ages 14 and up. 11" L x 3" W x 6 1/2" H. (3 oz.)