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Re: [PSUBS-MAILIST] Theory Question

It seems anything having to do with supercavitation is pretty dangerous.  From some of the reading I did another problem is with the steering of the projectile within the cavitation bubble itself.  The projectile can start banging around inside the bubble along with some other issues.  I'm really not big into going as deep as possible anyway, reading about the pressures at depth make me nervous.  Being able to cruise around at 100 ft to watch the fish, or race around in a bionic dolphin is more my cup of tea.
----- Original Message -----
From: Captain Nemo
To: personal_submersibles@psubs.org
Sent: Tuesday, June 25, 2002 3:59 PM
Subject: Re: [PSUBS-MAILIST] Theory Question

James,
 
Somewhere in this thread, someone (you?) wondered if a sub wrapped in a supercavitation bubble might be able to operate at great depth without regard for pressure hull strength considerations.  I suppose in theory that's possible, depending on whether or not one could generate a bubble of greater pressure than would be encountered down deep.  However, I don't think it would be wise to rely on such a system, though; for the obvious reasons of what would happen if it failed at greater than design collapse depth.  Whammo!  Your barracuda becomes a flounder!
 
Pat
----- Original Message -----
From: James
To: personal_submersibles@psubs.org
Sent: Tuesday, June 25, 2002 12:29 PM
Subject: Re: [PSUBS-MAILIST] Theory Question

Oh I definitely understand that, I don't imagine that anyone would want to travel that fast near anything that would come even remotely close to the sub.  I was just wondering if the assumption that supercaviation =  less hull pressure was accurate.
 
James
 
----- Original Message -----
From: Herve
To: personal_submersibles@psubs.org
Sent: Tuesday, June 25, 2002 3:16 PM
Subject: Re: [PSUBS-MAILIST] Theory Question

Hi speed for underwater vehicles is suitable only with enough deep waters and "room" around, there is no way you can drive a mini sub at more than 10 m/h in shallow waters or with reefs and obstacle. it s like driving a car in the fog. Even with 100 Ft visibility once you SEE the obstacle the collision is at 5 seconds, 5 sec to make a sharp turn or stop is actually not easy at all. Add to that the momemtum  of the sub.
Herve