Hot Air Balloon

This is a free-flying hot air balloon designed for sporting, training, and recreational flights. Its structure centers on a large envelope with a volume of 80,000 cubic feet (2,266 m³), constructed from high-strength nylon with a density of approximately 35 g/m². The use of lightweight fabric keeps the envelope's mass to around 65 kg, reducing the balloon's total weight and optimizing lift efficiency. The envelope consists of 16 vertical panels joined by robust seams and load tapes, creating a distinctive semi-streamlined, slightly convex shape. Load is transferred from the envelope to the basket via 16 heat-resistant steel cables secured with carabiners. The lower section of the envelope features heat-resistant panels and a specialized air intake area that protects the fabric from the burner flame's heat. Lift is generated by heating the air inside the envelope: a gas burner raises the air temperature, making it lighter than the surrounding air and causing the balloon to rise. Altitude is controlled by adjusting the air temperature, while descent is achieved by releasing hot air through a top-mounted deflation system. The balloon is equipped with a standard parachute valve, as well as rapid deflation systems and rotation vents. Its configuration accommodates a pilot and two passengers, making it a compact choice for small groups. When inflated, the envelope measures approximately 21 m in height and 17 m in diameter. Designed using CAD software and manufactured to aviation standards, the balloon combines low weight and durability with efficient use of internal volume. A distinctive feature is precisely the reduction in the envelope's mass without altering its basic aerodynamic configuration, enabling the aerostat to achieve a favorable ratio between volume, empty weight, and payload.