"What? A frigid airship? " "He's welding something," said Goodall, wearing earplugs. The huge engineering lab is full of mechanical parts and the reacting chemical potions.

Lin Feng nodded, "is there any way to make it?"

"it's easy," said guberul, who took off the eyeglass. "As for the problem of propeller icing, as long as the metal that is not easy to freeze is used, the hot-air balloon can be coated with glycerin to prevent icing. As for the kindling, when I went out to investigate this morning, I just met a kind of flammable ground gas here, which can burn when encountering water. We can collect some as fuel."...