Features The rubber band powered aviation model is a biplane glider aircraft that operates using the principles of rubber band elasticity and aerodynamics to achieve takeoff and sustained flight. It features a simple, elegant design with durable, high-quality materials and a well-balanced structural configuration. The fuselage has a parallel double-bar frame, and the two large front wings are securely fastened with clips to prevent loosening during flight. Purpose: 1. Learn the flight mechanics and historical context of rubber-powered aircraft 2. Develop skills in adjusting and flying rubber-powered models Flight Guide: A. Inspect the model View the model from the front to ensure it is symmetrical and free of warping or deformation. B. Adjust the model In calm or slightly breezy conditions, gently launch the model by holding it at the center of gravity near the nose. Observe its flight behavior: a wave-like path suggests a light nose—adjust the wing platform rearward; a diving motion indicates a heavy nose—move the wing platform forward. C. Powered flight Begin by winding the propeller clockwise approximately 15 times. Hold the aircraft in your right hand and support the propeller with your left, then gently launch it into the wind. Aim for a smooth, climbing glide. If the turning radius is too tight, make a small cut at the base of the vertical stabilizer and bend it slightly in the opposite direction. Once stable, perform high-power flights by winding the rubber band 200–220 times. Specifications: Product Name: Rubber Band Biplane Materials: Eco-friendly foam, imported rubber band, ABS plastic, wooden strip Color: 4 colors (random) Product Size: 50 x 43 cm Notes: * This product requires self-assembly. Please consider this before purchasing. * During assembly, lightly sand the edges of the wooden frame with a knife to ensure smooth insertion. Avoid excessive force to prevent damaging the foam wings. Model building enhances manual dexterity; parental supervision is recommended for children. * Once assembled, the model cannot be disassembled. Package Includes: 4 x Rubber Band Powered Airplane Kit