Popular Mechanics wrote:There is a new breed of recreational airship taking flight on the fringes of aviation. These blimps are intended for fun, not transport. The key innovation: substituting hot air for helium or hydrogen as a lifting gas. Hydrogen, the lightest element, is dangerously combustible. Helium, though inert, is expensive. If an airship uses hot air, as balloons do, you can just let the air escape at the end of each flight, fold up the envelope and store it. “I want to fix the world of the blimp,” Nachbar says. “Here you have a corner of aviation that has been dormant for decades, for generations. What we’ve come up with is a disruptive technology.” ...more >>