Optical Flow Helicopters

YU XIANG F07 1/34 Scale UH-1 Huey 2.4G 6CH Brushless Direct-Drive 6G Flybarless RC Helicopter Model with Optical Flow Positioning (RTF Version/Mode1/Mode2)

YU XIANG F08 1/27 Scale Bell 206 2.4G 6CH Brushless Direct-Drive 6G Flybarless RC Helicopter Model with Optical Flow Positioning (RTF Version/Mode1/Mode2)

RC ERA C127AI Helicopter Scout Drone Model 2.4G 4CH Single-Rotor Brushless Model Without Aileron