RC ERA C180 BO105 150-size (1:26) Gyro Stabilized Scale Helicopter - RTF w/ Optical Flow+TOF Sensors & One-key Inverted Flight (Military) 1:26 scale of the German Military BO-105 Helicopter in the Cold War Features: Utilizes a 6-channel single-rotor without auxiliary wing design, employing the principles of aerodynamics in the rotor design to provide strong power and inherent stability for ultra-stable flight.