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I've got a 2008 Fountain 38 Sportfish Cruiser with twin 320 hp diesel sterndrives, and I've driven it a lot in 3 to 5 seas, with my maximum seas being 6 foot swells. The stepped hull is unbelievable in these conditions. I've had to slow down to 35 mph but there's very very little pounding. My wife and 10 and 12 year old kids were onboard this summer when we ran from Martha's Vineyard to Block Island with 20-25 mph northwesterlies hitting us on the starboard bow quarter as soon as we got past Cuttyhunk. There were tightly packed 4-5 footers coming at us for 30 miles. We blasted through this at 35 mph getting 2 mpg with no one complaining at all -- much to my shock -- and only once or twice did we launch and smash. It was really impressive. The only problem is that Fountain doesn't have windshield wipers and it was a bit tough to see after the bow crashed through the waves My last boat was a 290 Sea Ray Amberjack and at 20 mph in those conditions we would get the crap kicked out of us. The only problem with the Fountain is that it can't hold a plane much below 25 mph. I've become a big fan of stepped hulls in all conditions, but it takes a while to get used to them and they can be dangerous if you don't know what you are doing. You must trim the outdrives and the tabs to run these boats properly and be on your toes. Try it.. You'll like it.
I have a 36 Invincible and I agree with everything lcosta wrote. I haven't been in anything bigger than 3-5, but at 2-4 and even 3-5, I usually run 45-50 mph and the boat truthfully runs best at or above 50 mph, at 4400 RPM/motor with 350 gallons of fuel, full gear, wells, people, etc. With that said, the ride is unbelievable at 50 and you just have to trim it right and be careful when she wants to fly off bigger waves.
I can hold plane around 15 knots as well. To be honest, the boat rides 2x worse going 30-40 mph going through seas where the boat can do 50 through. Bump it up to 50 and the ride is just incredible and a lot of fun, too.
And as far as Invincible as a boat is concerned, I have one of the first to come out and the fit & finish on that boat is just out of this world. There really is nothing I can complain about...the wiring is not exposed and hidden behind a separate hatch in its own dry compartment and is neatly labeled and positioned. I don't think there will be a 'next' CC as this size absolutely gets the job done for me.
All boats ride crappy in really heavy seas. I crossed in a 55' Viking in 8ft. seas from Bimini and the ride was bad, so trust me, a 33-36' CC is going to be uncomfortable in those seas.
You should have been in a 56! JK
Either way I think that stepped hulls are overrated in a sea way. Many of the stepped boats are good/great hull forms but if its crappy out, they do no better. Some work better down sea and others work better in a head sea. I run a 34 SV and often fish in a 39 as well as a 36YF and 36 Contender. I have 2 friends that have switched from stepped back to traditional hulls (39SV and 41 Bahama) and are happier. Of course, these guys fish for Tuna and other bluewater species and prefer not to chase Kitty Cat food!
Again you need to run these boats in the contitions you are trying to best fit.
I had the opportunity to run several of the boat a couple of years ago at the miami boat show. The weather that weekend was plain nasty. worse than most people would ever venture of in. What I found on two of the stepped hulls we ran was that in really bad stuff, if you just came of the throttles a bit the boats had the tenency to come of plane and that the ride was slightly harsher on the stepped hulls vs the comparative deep v. comparing 36ish to 36ish, ect. . Keep in mind it was very rough that whole weekend and within each class I felt there were notable diffrences. what it is clear is that most of the people that have good quality stepped hulls absolutley love them. where they seem to shine is in 3-5 or less which is about the max most people want to run in anyways.
most people here have large investments in there vessels, so after drinking the juice there is alway some bias. me included..
THE INVINCIBLE 36 IS AMAZING. Take a ride, you will buy. She loves to run, and eats rough stuff up, been in 7+ crossing Rebecca Shoal head on going 20+knts, AWESOME. The YF and INV are in a league of their own.
I think most of the stepped hulls have 22.5 degrees of transom deadrise (YF, Invincible, Donzi, Intrepid, 38 Fountain,.. etc). With the exception of the 32 & 34 Fountain having 23.5 degrees. I am not sure about the new 33 Contender?
does anyone else know anymore specs?
__________________ 2015 392 Nor-Tech with quad verados
2014 38 Fountain open with trip 300 verados
2015 25' Crevalle Bay with 300 verado
1980 233 Formula CC with 6.2L
the stepped hull architecture is the most efficient for planing crafts, and it allows to realize the best technical compromises for given design targets. If the target is good cruise speed in rough waters, for a load-carrying hull, that solution permits to employ a deep V in center of gravity region, normally a bit ahead of the step at something more then Lwl mid-lenght, designing trim angle on forbody primary lifting suface at its optimum values, for the best deadrise-trim-aspect-ratio combination. There are, instead, many limitations in reaching this mix with conventional hulls.
Some good info can be found on this link:http://www.boatdesign.net/forums/boa...nce-35492.html