Re: [PSUBS-MAILIST] Reserve buoyancy

[Jon Wallace <jonw@psubs.org>]

Scratch my "cage" idea Dean.  I realized that your "snag" potential with 
an exposed cage would go up by a factor of about 10^32.  Very bad idea.
Jon



Jon Wallace wrote:
> What is the advantage of having the tank bottom sealed with hypalon 
> instead of merely open to the water?  Containment of air without 
> burping (and losing air volume) at the surface?
>
> What about building a cage for the hypalon or lift bag similar to a 
> rebar skeleton use for columns?  This would retain the shape of the 
> inflated bag but at the same time offer minimum drag with no water 
> mass from an enclosed tank to worry about.
>
> Jon
>
>
> Sean T. Stevenson wrote:
> > This suddenly made me think of something - and I'm sorry that I'm not 
> > at my own workstation right now or I would sketch it - but imagine if 
> > you will hard ballast tanks (saddle tanks), slung high under the 
> > weather deck, sized appropriately for the design waterline with tanks 
> > blown.  These tanks would have a flat bottom instead of being faired 
> > into the hull, and attached to the underside of these tanks are 
> > hypalon buoyancy tubes which are ordinarily deflated (thus 
> > eliminating the extra mass of water to be moved, but adding some 
> > surface / form drag), but which may be inflated to increase the 
> > freeboard in specific circumstances, or, if appropriately sized, as a 
> > salvage measure.
> > -Sean




************************************************************************
************************************************************************
************************************************************************
The personal submersibles mailing list complies with the US Federal
CAN-SPAM Act of 2003.  Your email address appears in our database
because either you, or someone you know, requested you receive messages
from our organization.

If you want to be removed from this mailing list simply click on the
link below or send a blank email message to:
	removeme-personal_submersibles@psubs.org

Removal of your email address from this mailing list occurs by an
automated process and should be complete within five minutes of
our server receiving your request.

PSUBS.ORG
PO Box 53
Weare, NH  03281
603-529-1100
************************************************************************
************************************************************************
************************************************************************