The DeepFlight Super Falcon, developed by California-based Hawkes Ocean
Technologies, is a two-seater, winged submersible that can take
passengers on undersea joyrides. The custom-built underwater vehicles
are designed to dive below the surface, swim amongst marine animals,
deftly navigate through underwater canyons, and even perform aquatic barrel rolls.
Traditionally, submarines are constructed with an inner shell and an outer shell. To dive, submarines fill the space between the two shells with water, changing the ship's density and creating so-called negative buoyancy — when the gravitational tug on the sub is greater than the force of buoyancy. When submarines remain on the water's surface, the area between the two shells is filled with air, which again changes the vehicle's density and enables it to float.
The Super Falcon, however, dives underwater like a whale, using thrust to generate "downward lift" to help the vehicle descend below the water's surface. Essentially, the submarine uses lift and drag — the principles of regular flight — to "soar" underwater
http://in.news.yahoo.com/1-7-million-personal-submarine-lets-39-fly-130601919.html
Traditionally, submarines are constructed with an inner shell and an outer shell. To dive, submarines fill the space between the two shells with water, changing the ship's density and creating so-called negative buoyancy — when the gravitational tug on the sub is greater than the force of buoyancy. When submarines remain on the water's surface, the area between the two shells is filled with air, which again changes the vehicle's density and enables it to float.
The Super Falcon, however, dives underwater like a whale, using thrust to generate "downward lift" to help the vehicle descend below the water's surface. Essentially, the submarine uses lift and drag — the principles of regular flight — to "soar" underwater
http://in.news.yahoo.com/1-7-million-personal-submarine-lets-39-fly-130601919.html
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