See also hyperblimp dot com. This vehicle runs on sunlight, and thus can fly as long as the sun shines (which, of course, it always does above the clouds). You can see the panels inside (see hyperblimp.com for more info). It’s made it with off-the-shelf materials, for about $1000. Location: Sugarhouse Park, Utah, June '06. (Pat. Pend.) If an elementary school teacher like myself can make this happen, with panels that are less than 6% efficient, it is worth contemplating what our country could have done by now if we'd made the effort. But as they say, better late than never.