The volume of a standard hot air balloon is divided into several levels: the volume of a seven-level balloon is 2000-2400 cubic meters; The volume of the eight-level ball is 2400-3000 cubic meters; The volume of the nine-level ball is 3000-4000 cubic meters; The volume of the ten-stage ball is 4000-6000 cubic meters; The alien ball, the only panda hot air balloon in China at present, has a volume of 2,300 cubic meters.
The hanging basket is made of rattan (most of our country adopts materials imported from Southeast Asia), which can reduce the impact force when landing. Four special liquefied gas bottles for hot air balloons and instruments were placed at the four corners of the hanging basket. The hanging basket is also equipped with flying instruments such as thermometer, altimeter and lifting platform.
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Hot air balloons usually use propane or liquefied gas as fuel, and gas cylinders are fixed in hanging baskets. A hot air balloon can carry 20 kilograms of liquid fuel. When igniting, the flame is 2-3 meters high and makes a loud noise.
Hot air balloon is not really "driven", it moves with the wind, but because the wind has different directions and speeds at different altitudes, pilots can choose the appropriate altitude according to the direction needed for flight.
The flight speed of a hot air balloon is determined by the wind speed, because the hot air balloon itself has no power system and the flight speed depends entirely on the wind speed. The maximum descending speed of the hot air balloon is 6m/s, and the maximum ascending speed is 5m/s. ..