Sorry Larry. Thought that would be pretty obvious with my built-in bias! Great Harbour.
Sorry, but you lost me. I see you have a Californian 45.
Sorry Larry. Thought that would be pretty obvious with my built-in bias! Great Harbour.
Yeah, my liveaboard is an old Californian - but as I have posted in many other threads, I was Sales Director for Mirage Manufacturing/Great Harbour Trawlers for 9 years. Thought you had participated in some of those threads. My mistake. ERIC
...ANY boat gets more stable with stabilizers
Probably around $60k, yard installed. If retrofitting, it depends on access. Ideally they will be midships, but anywhere in the middle third will likely be ok.
Even if a vessel has a lot of initial stability, like the Great Harbor boats, the idea that they would not be improved with stabilization can't be correct.
I'm basing my observation on the simple fact that the ocean is not flat, at least not all the time. An unstabilized vessel, even if it never varies except in inclination to the seas, will nevertheless incline along with those seas. That is not the case if the vessel is stabilized. If it is, the gyro senses the inclination and largely corrects it. This doesn't require a degree in naval architecture to understand - just a passing understanding of sea states in the ocean.Delfin, I'm just not sure just where these stabilizers would be mounted on a GH hull. Sticking straight down from the bottom and doubling the draft? Or sticking straight out on the hull sides like curb feelers - adding 6 or 8 feet to the overall width of the boat? Tell you what: Eventually Lou will stumble across this thread. As a Webb Institute trained Naval Architect and an MIT grad - and the designer of the GH hull - his opinion should carry some weight.
...if you want the kind of lack of roll you get with a stabilized vessel then perhaps a GH isn't your first choice.
Delfin, I'm just not sure just where these stabilizers would be mounted on a GH hull. Sticking straight down from the bottom and doubling the draft? Or sticking straight out on the hull sides like curb feelers - adding 6 or 8 feet to the overall width of the boat?
There are lots of nice features of either a Manatee or a GH, but you are quite correct. Whatever those advantages are, they don't include a suspension of the laws of physics and those vessels will roll along with the seas, although certainly less than a round or fuller hull would, but also certainly more than a stabilized hull of whatever form. Having spent enough time in the open ocean on the West Coast of Vancouver Island on Delfin without having my wife's Sonicare toothbrush tip over when standing on end in the head I think I understand the function and effectiveness of active fins.The KK Manatee hull is quite similar in its acceptance of fin stabilizers. On the only application I know of, they do come out of the water. It's well known that the Manatee hull has better "initial" resistance to roll than say, a 42, but beyond a certain sea state, it is known to roll more.
There's a plethora of reasons why my first choice of boats would be a GH, but behaving like a true, stabilized vessel wouldn't be one of them. I think Codega came up with a combo that behaves like the hull it was inspired by....a design that resists roll.
Wow. What an argumentative statement. Tell me, have you ever been in a seaway aboard a NOT flat-bottomed Great Harbour? Or are you just guessing based on your "passing understanding of sea states"?
If you are at all interested to read what Lou Codega has to say about stability...
About Great Harbor Trawlers : Design Discussions
And in those 10,000 nm, in a beam sea with 12 foot waves, when one passed under the GH did it roll with the waves, or remain perpendicular to the horizon in defiance of the laws of gravity?Not trying to pick a fight, just giving my opinion, based on about 10,000 nm aboard unstabilized GH's in all kinds of conditions.
Seems a bit like declaring that hauling 40 tons of rocks is unnecessary because your truck will only hold 10 tons.Add to that a hull form which provides no suitable location for fin installation, and you arrive where we are....and if something can't be stabilized, it makes sense to declare stabilization unnecessary.