Roll Stabilization

[FAST FRED]

The simplets is a Training Wheels tri concept, where the amas are simply to stop the boat from rolling.

Perhaps with a simple hinge ski they could offer increased active roll controll underway.

Having had a Tri in rolly harbors & it was grand.

The monohulls would set all kinds of ground takle to attemt to point into the big swells, and still rolled like logs!

WE simply went up & down , far easier to live with.

Today in a monohull of affordable size I think the dink (say a 13ft Whaler) could simply be hoisted a foot or so on a boom amidships to give great roll resistance, although it would make the dink easy to steal.
(Recovering New Yorker)

FAST FRED

[Guillermo]

Originally Posted by ivansalasj

Dear all,

I am currently doing some research in active fin stabilizers for zero speed. I am using a 33 m power boat and a variety of cfd programs to simulate the roll motion. I am currently at the stage where i need to choose reasonable fin dimensions for this particular yacht and then i will need to implement the damping produced by the fins on the overall roll motion. If anybody has any suggestions to my current stage i will be great ful to hear them.
Thanks, Ivan

Ivan,
Have a look at the SIS system: http://www.stabtech.com/
Regards,
Guillermo.

[brian eiland]

Sorry I just have a tough time selling myself on going to sea in a 'strickly-power' craft. I keep coming back to the motorsailer concept if abandoning a primarily sailing craft.


Here's a short excerpt from a gentleman who is living his dream of taking his trawler across the Pacific to Australia. Some have been following his story for a couple of months.

Gentle Wind - Moving again, breaking down again

Well, on Monday we finally got our electrical repairs completed, and got fueled up on Tuesday. (Rarotonga fuel price is US$3.50 per USGallon.) A new crew member arrived on Wednesday, and we headed out on Thursday afternoon, next stop Tonga.

Five hours out to sea, the Naiad stabilizers decided to go Tango-Uniform on us - the second time since we left California back in June. We decided to keep on going, since a return to Rarotonga was not something we wanted to contemplate after having just spent five weeks there waiting for the electrical repairs. Fortunately, we had wonderful conditions, with smooth following seas and light winds on our stern almost all the way.

Anyway, we have a new crew member on board. More to the point, I've demoted myself to first mate and we have a new skipper on board. I decided that I didn't want the skipper's job any more, since I've spent just about every waking second taking care of everyone else and the boat, too, but not having any time for Number One (me!). So, Stuart is now skipper, and I'm just a hired hand. We'll be completing the trip across the big pond to Australia, but at that point I'm just going to have "deleted" shipped back to the states and put up for sale. Too many things keep breaking, and the repair bills (on top of the fuel bills and the crew's grocery bills!) are breaking the bank.

It might sound like I'm giving up, but I don't look at it that way. I've proven to myself that I can do this, but I've also learned that it's a lot more than I had bargained for.

We'll be here in Tonga for just a few days, fueling up and waiting for a weather window to Suva, Fiji. We hope to find someone there who can figure out the problems with the Naiads so we can have some stabilization on the way to New Caledonia and Australia.



Brian added
I just don't want my source of propulsion and my source of stability dependant soley on a fuel engine. I think this posting addresses the KISS principle as well.

[masrapido]

Or, you could simply build a nice catamaran and solve the problem, portager. And get more space and speed along the way.