BAR wrote:
wrote:
On Jan 15, 11:08 pm, WaIIy wrote:
On Tue, 15 Jan 2008 18:16:22 -0800 (PST), wrote:
OK, just read about supercavitating torpedoes where a gas bubble is
formed behind the nose of the torpedo in which the drag is much less
than if he torpedo was immersed in water. Sometimes the gas bubble is
formed by compressed gas.
So.........
Put millions of tiny holes in your hull through which you force
compressed air to radically reduce your drag. This sounded great till
I realized that then there would be a lot less bouyancy
The Russians already are doing this in a way.

http://tinyurl.com/277676

Download the pdf from link at the top, much better format.

Wasn't one of the Americas Cup boats dimpled like a golf ball to
create a cushion of air..??

Did it work? Did it win? Or, is the Captain still in the equation when
sailing?


The captain is ALWAYS in the equation. But dimples on a boat hull will
actually slow the boat down, the golf ball needs to rotate to increase
lift. The America's Cup boat used tiny scratches along the hull (called
riblets) to decrease water resistance.