Re: [PSUBS-MAILIST]

["George Slaterpryce" <gslaterp@hotmail.com>]

Keel weights.

 

Weights (usually lead or even solid steel) are placed on the centerline on the bottom of the boat. This keeps the craft from rolling, The further the weights are from your center of gravity the more stable your boat. (see http://www.captovis.com/marine/designsketches/keelweights.png for one possible configuration).  As you design your boat or craft keep try to keep most of your weight on the bottom of your hull, distribute it as evenly as you. Basicly keep your weight below the waterline of your sub as if it where surfaced.

 

Hope this helps.

 

George Slaterpryce

----- Original Message -----

From: Iain and Ianthe Gibson

To: personal_submersibles@psubs.org

Sent: Friday, March 03, 2006 11:54 PM

Subject: [PSUBS-MAILIST]

Folks,

 

I have not come very far in my design process except for working throu the hull design and structural engineering factors.

 

I am wondering how you maintain a low centre of gravity so that you stay upright all the time whether with full ballasts or empty, when the ballast tanks on the photos I see seem to be placed anywhere from above centre or below?

 

Regards, Iain.