Self righting boats

Elling has made that a key to their boats and business and did a big "360 test" in March 2014. You might find the video on their site interesting.

It;s been discussed right here on YF, including the video:
http://www.yachtforums.com/threads/elling-e4-capsize-test-is-live.22665/#post-217326

Most all sailboats are self righting. If the keel is heavy and the boat designed to self right itself, it will. I would rather not be on it when this happens.

Center of gravity.
Weight, displacement & Buoyancy.
Plus a understanding person who knows how to apply these variables.
Yep, above my pay grade..

Math.

Basically it´s pretty simple, you need a boat boat with low center of gravity resulting in a long stability curve with positive righting moment well above 90° and sufficiently voluminous strong watertight superstructure that creates extra bouyancy when capsized to help getting over the dead point when upside down. The trick is to make the upside down flaoting position sufficiently unstable so the boat rolls over again.
The rest of the game is for those folks who can successfully calculate stability.

If you really want to cheat and peek at some stuff. Look up; proboat.com
I think you can look up past issues on line. I remember an article early this year discussing a sailboat that rolled over. Then a second article (same mag) discussed what really happens to a boat when it rolls and some self righting, roll, ballast & displacement principles. A lot went over my head but the pictures helped me understand some of it. I like pictures,,,
Without a big white board work group gathering here, and blowing most of us aweigh, check into that past magazine.

If you understand any of that, or anything on your own and want to share, it could be a good follow up on this thread.

cheers,
rc

...well, sure. Some math, some physics. That´s all. But if you want to give an answer and not just tell the TO not to bother the adults with that it´s not completely wrong to loose a few more words, no?

Oh,of course there are a few more details about these boats. For example it´s a good idea to prevent the engine from falling through the roof... ;-)

Then the bigger question is, "Is self righting desirable". I don't think that's as clear cut as some think.

Haha, I would guess having the need for a self-righting boat is not desireable at all.

You were rite, maybe to short of answers.

You got a white board handy and want to teach to AS level marine engineering, theories and design thru the forum?
Including how to install an engine?

Hmm, ok, perhaps we should keep that question down to "don´t try this at home"?