It was the French Montgeffe brothers who released Europe's first balloon filled with hot air into the air in 1783. The French brothers Robert were the first to take to the sky in a balloon filled with hydrogen. The only driving force of a hot air balloon is the wind. For a hot-air balloon flying around the world, it is necessary to select a high-altitude airflow with the right speed and direction, and move accordingly in order to efficiently complete the flight.
Just like making a round-the-world trip need to constantly change the plane, the hot air balloon needs to take different air currents, \"change air\" when the pilot has to do is to adjust the height, the height of the hot air balloon is usually more than ten kilometers. Powerboat: One of the hallmarks of the Second Industrial Revolution was the invention of the internal combustion engine. Powerboat refers to the internal combustion engine as the power, in order to distinguish from the steam engine as the power of the ship.