206 6CH Singlepropeller Flybarless Helicopter C138 (Optical Flow Version) Overview A realistic 1:33 scale singlerotor flybarless helicopter model designed for hobbyists and beginners. Built from PA and PC materials for a good balance of durability and light weight. Optical flow and barometerassisted controls help maintain stable indoor and outdoor hovering while providing advanced control options for skill development. Key benefits Stable flight and easy hovering: Barometerbased altitude hold and an optical flow sensor help maintain steady altitude and position, reducing pilot workload during hover and slow flight. Smooth control and responsiveness: Flybarless rotor design combined with a 6axis gyroscope delivers predictable, stable handling and responsive maneuvering. Beginnerfriendly safety features: Low voltage alert, jam protection, and failsafe mode reduce the risk of damage and make it easier to learn. Onetouch takeoff and landing simplify basic operation. Portable and ready to fly: Lightweight body and USB charging make field use convenient. Compact size fits in most backpacks for quick outings. Performance and specifications Model number: C138 Product type: 6channel singlerotor flybarless helicopter, optical flow version Scale: 1:33 model of a light utility helicopter Rotor diameter: 306 mm Body size: 306 x 79 x 101 mm Product dimensions: 31.2 x 7.9 x 10.1 cm (12.2 x 3.1 x 3.9 inch) Weight: Helicopter only 105 g; product weight 500 g; package weight 800 g Materials: PA and PC Battery: 7.4 V lithium battery (included) Charging time: 50 minutes via USB charger (included) Flight time: 11 to 13 minutes per charge Control range: 80 to 100 meters Packing: Graphic carton Recommended age: 16 and up Features Altitude hold via integrated barometer for consistent hover altitude Optical flow positioning for improved indoor stability and slowflight control Flybarless rotor system and performance main propeller for efficient lift and steady flight Integrated 6axis gyroscope for smooth stabilization Low voltage alerts and failsafe protection to safeguard electronics and motor Jam protection and 6G stability settings that balance responsiveness and ease of control Onetouch takeoff and landing, adjustable steering rates for pilot preference USB charging for convenient field recharges Capable of advanced maneuvers including 360 degree spins and barrel rolls for experienced pilots Package contents Gift box 1 Helicopter 1 Remote controller 1 Manual 1 USB charger 1 Main propeller 2 Tail propeller 1 Lithium battery 1 Screwdriver 1 Hexagonal wrench 1 Hex wrench 1 Use scenarios Indoor flight training: Optical flow and altitude hold make the helicopter suitable for practicing hovering and basic control in a gym, hall, or large living area. Outdoor casual flying: Lightweight and portable for shortrange practice sessions and recreational flights in parks or open fields within the 80 to 100 meter control range. Skill progression and demonstration: Advanced control features and stunt capability allow intermediate pilots to practice precision maneuvers and build piloting skills. What you get A readytofly, scale singlerotor flybarless helicopter kit with controller, battery, spare props, tools, and USB charger. Model C138 combines stable flight systems with beginnerfriendly aids and enough performance for experienced hobbyists to practice advanced maneuvers.