Furthermore, airships can stay aloft anywhere from hours to days -- much longer than airplanes or helicopters. These properties make blimps ideal for such uses as covering sporting events, advertising and some research, like scouting for whales. Recently, there has been renewed interest in using...
Of course, if the object is denser (and therefore heavier) than water, it doesn't matter how much water it displaces -- it will still sink. To ascend, a fish must reduce its overall density by increasing its volume without significantly increasing its mass. Most fish do this with ...
Rocket Forge: How Much Will It Cost? - An unofficial estimate Space.com: Private Spaceship Completes Second Rocket-Powered Test Flight - 4/8/04 USA Today: Feds give private spaceship go-ahead to expand flight testing - 4/8/04 Space.com: Passenger-Carrying Spaceship Makes Desert Debut - 4...
Aerostats—the word encompasses powered airships (“blimps”) as well as unpowered balloons—have long been associated with military applications, particularlyinformation-gathering activities. They hold numerous advantages in persistence and cost, and thus many of the Chinese organizations that produce ...
Arotary motionis the easiest way to keep a wing continuously moving. You can mount two or more wings on a central shaft and spin the shaft, much like the blades on a ceiling fan. The rotating wings of a helicopter function just like the airfoils of an airplane wing, but generally helico...
It is a much larger system than Boeing’s new Avenger turret, but it could make up the higher-end of a high-low SHORAD mix. The system is built to primarily use aMPQ-64 Sentinel radar, which can be towed or can be vehicle mounted, but it also is intended to b...
Ballonets are usually made of a fabric lighter than the envelope's because they only retain gas tightness and do not have to withstand normal main envelope pressures. Air scoops channel air to the ballonets. Blimps obtain much of their lift from lighter-than-air gases, most commonly helium,...
how is that any more do-able than the elevator? 1200 miles long and hanging 50 miles in the air rockets and aerospace investment is still way more cost effective dr Jan 12, 2010 #86 wolfkeeper 15 0 Launch loops scale much better than rockets. If you want to build a bigger rocket,...
Much of the time, weather balloons simply become litter after a trip into near-space. If balloons catch a particularly strong gust of wind, they can travel several hundred miles -- touching down anywhere from a marshy bog to the snowy peaks of the Rocky Mountains. Sending helicopters to pick...
Furthermore, airships can stay aloft anywhere from hours to days -- much longer than airplanes or helicopters. These properties make blimps ideal for such uses as covering sporting events, advertising and some research, like scouting for whales. Recently, there has been renewed interest in using...