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

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

When you think about it, that's what an air cushion boat is.

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..??

"Short Wave Sportfishing" wrote in message
...
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

When you think about it, that's what an air cushion boat is. And thats
what eats deisel engines and propellers.

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?

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.

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

Back when I was still surfing (The seventies), we tried an approach to
speed up the surfboard. Here is the formula;

Grind up about a thousand AlkaSeltzer tablets. Mix it with a clear
water soluble solution. We used water based polyeurethane. Paint
multiple coats on the bottom of the board.

Wait for a day when the conditions are such that you can walk or bob all
the way out to the breakers. Carry your board over your head all the
way out. Stand out there like a fool with your board over your head
until the perfect wave comes along. Slam the board down onto the water,
paddle like hell and catch the wave.

Result: Board moves too fast, slips out from under you and you have to
start all over. Board has awful coating of pockmarked poly on the bottom.

And we tried this multiple times.

--
Robert Allison
Rimshot, Inc.
Georgetown, TX