It comes with a four channel transmitter with proportional throttle and trim settings that allow you to control the angle of attack of each rotor. This is the remote-controlled <em>helicopter</em> that can be maneuvered by beginning flight enthusiasts through doorways and hallways indoors, and up to a range of 400' <em>outdoors</em> in calm winds. Unlike other dual-rotor toy <em>helicopters</em> that simply hover, this one uses motors that generate twice the torque of other motors, and it has counter-rotating rotors that eliminate
Megatech MTC9513 Horse-Fly 4-Channel Electric Indoor/<em>Outdoor</em> <em>Helicopter</em> Megatech MTC9513 Horse-Fly 4-Channel Electric Indoor/<em>Outdoor</em> <em>Helicopter</em> MTC9513 665766095136 Megatech Shipping: ยป Description Flying a HeliJust Got Easy! The secret of Horse-flys incredible stability is foundin its coaxial (twin rotor) design. Horse-flys over and under twin main rotor-blades are counter-rotating. The two rotors, being equal in size and mass and are moving in opposite directions which cancel out each others torque force.