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Disadvantages of a stepped hull?

Old 06-24-2019, 08:25 AM
  #21  
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For me its falling off plane in rough head seas, tough to back down on smaller boats and difficult to push off sand bars .....
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Old 06-24-2019, 10:23 AM
  #22  
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Originally Posted by ed d View Post
Read this - Peters talks a bit about the Intrepid design then on to the Invincible design ... which were his ... straight from the horse's mouth so to say .

MP Step Hull
great article, thanks for posting
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Old 06-24-2019, 10:34 AM
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I have a twin step 28í hybrid with 18 degrees of dead rise. I am running the duo prop Suzuki so nonissues backing up like I read in this thread. The boat will run 25-30 all day, but likes to run 42-45 mph. I find myself pulling the throttle back when itís rough because the boat will gain speed with the right wave pattern. I donít find it plains at higher speed than my other non step hulls, but that could also have something to do with the duo prop. I run in the mid 40ís through the 10-15 miles of bayous to get to the open gulf and during that ride there are dozens of sharp turns. This boat makes that ride a lot of fun. Cruising 40-45 through the turns and it has never let loose like I have witnessed with other stepped hulls. It literally carves through and makes for a lot of fun.

This is the only step boat I have owned, but so far I really like it.

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Old 06-24-2019, 10:37 AM
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where is Otseg? We need some peer review of this "article".....i think it's an article used for promotional purposes, which it does effectively. In skimming i only found a couple of inaccuracies.
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Old 06-24-2019, 12:25 PM
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Originally Posted by griff12ga View Post
Anyone here run the stepped intrepids and the go-fast center consoles (like a yellowfin, seavee z, invincible, contender st, etc)? I havenít, but the stuff intrepid says indicates they have focused on a single step to optimize for a slower speed and more stability than the others. Wondering if they plane slower, have a slower band of efficiency, etc...

its interesting too because they started with the step design before big horsepower engines existed - they werenít trying to be the fastest, but rather the biggest with acceptable performance (Iím thinking of their hulls in the late 90ís)
I had a 2000 32' intrepid with twin 225's-it ran fast and I continually ran past fountains, etc. offshore in any conditions that I was out in
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Old 06-24-2019, 12:32 PM
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Old 06-24-2019, 12:45 PM
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Having owned both, It's all about the conditions of the water you run in and how you fish... If you site fish and look for birds, porpoise etc you can miss alot at 50 knots because thats where alot of step hulls need to be to ride decent...Some times I want to fish when its a little sloppy and dont feel like flying-- this is where the deep v shines-- IMO... sure steps are faster and slightly more fuel efficient but its hard to beat the deep v when it kicks up and you cant cant run 40-50 knots... in the mid-altalntic and north East, it always seems to blow on the way home... Pick your poison based on how you use the boat..

good luck...
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Old 06-24-2019, 12:57 PM
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For those who do a lot of trolling, I've often wondered it stepped hulls create more whitewater in the wake pattern at trolling speed. I've always found, at least with outboard powered boats, the deeper the vee, the cleaner the water behind the transom (equating to more billfish strikes). We used to have a guy in our club with a 29' Fountain that couldn't keep billfish off his baits. The water behind his transom was as clean as the water in front of his bow. Man that thing raised fish!
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Old 06-24-2019, 01:48 PM
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I have a dual stepped bay boat. My boat really likes to run at 40 mph+. It tends to fall off of plane below 28 mph pretty quick depending how many guys are in the boat with me. Having the steps also limits transducer placement. If I mount a transducer on the transom, it will be pretty much useless at anything above idle speed. For that reason, mine has a thru hull transducer in front of the steps. The boat rides very flat in the water above about 36 mph when the steps are fully ventilated. During turns, the boat does not really lean into the turns like my buddies non-stepped bay boat does. it turns plenty tight, but still stays pretty flat in the water. There is a definite "hump" you have to get over when taking off before the boat settles down and speeds get up. If I do not keep the power up until I cross that hump, it will run much slower. Once I get past that point, the boat flies and accelerates quickly. When riding in reasonable chop, I keep the speed up and just sort of skip over it. All in all, I like the boat and how it rides alot. I just need to get a jack plate so I can raise the motor for real skinny water.
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Old 06-24-2019, 02:09 PM
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Iíve been looking at buying a 24 Yellowfin bay but Iíve been told when itís sloppy the boat doesnít ride well because it canít plane well. Is this true?


If the stepped hulls ride great when going fast then when someone wants to troll for wahoo at 15 mph then what do they do to plane at slower speed on a fast riding boat like this
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Old 06-24-2019, 03:07 PM
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They look sexy,
They're the latest thing
There is market demand
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Old 06-24-2019, 04:12 PM
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Originally Posted by marlinlane View Post
depends on the design of the hull and the horsepower on the transom- 35' with twin 350's will take longer to plane then 39' with triple 350's-check manufacturer planing times between comparably sized and powered deep v's and stepped hulls and I believe you will find no significant difference
The boat Iím talking about is a 36 Yellowfin with trips.
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Old 06-24-2019, 04:46 PM
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Originally Posted by real0319 View Post
I’ve been looking at buying a 24 Yellowfin bay but I’ve been told when it’s sloppy the boat doesn’t ride well because it can’t plane well. Is this true?


If the stepped hulls ride great when going fast then when someone wants to troll for wahoo at 15 mph then what do they do to plane at slower speed on a fast riding boat like this
Lots of mixed reviews on the YF 24 ride in sloppy conditions. I’d recommend talking with guys who have actually owned one and before buying take her out and run her hard in some slop.

I’d also recommend starting your own thread so we don’t derail this one.
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Old 06-24-2019, 05:31 PM
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That was a great read . I have a very rare Michael Peters designed boat , believe only 12 exist . It is the 38cc sterling . He designed it at the same time he did Invincible .The sterling doesn't have the tunnel to prevent spin out at high speed sharp turns . I dont do that so not a big deal . But boy does this hull ride well . At about 38 it starts getting on its step and bow comes down . Stern lift is high so it needs some trim to get its bow out of the water . Mpg is better at 40mph then at 30mph . The builder put the big K planes on it so planning at lower speeds is not a problem . Boat has triple 250 suzuki's and loaded can plane on 2 motors . Looking forward to putting more modern motors on it . This picture shows performance with these older motors . No way you could get this kind of performance on a big 38cc without a step .
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Old 06-24-2019, 05:34 PM
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I rode offshore on a Pathfinder 26 with a Yamaha 300. Seas were head on about 1-3. This boat would fall off plane at <26-28 mph but the seas were very uncomfortable at faster speeds. The boat would fall off plane going up the wave and jump on plane going down the wave. Net result was that constant throttling was required to power the boat up the wave and then pull back quickly to keep from jumping over the next wave. The ride was OK but driving the boat was very tedious on a 2 hour ride. Burned about 50% of the fuel capacity of the boat on the way out. I believe the boat was outfitted with a Powertech 4 blade prop after that trip which helped. The 4 blade also helped the boat get on plane faster than with the 3 blade Yamaha prop.

In a 1-2 foot sea the ride was very good for a bay boat. Totally different situation the ride was exceptional compared to a 24 bay boat.
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Old 06-24-2019, 05:36 PM
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Originally Posted by Bront Antwoord View Post
I am aware of their advantages, but I donít know enough to understand what a disadvantage would be? Would it be turning? Lack of grip on the back part of the hull at speed? Would beefier strakes help in turning?

none
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Old 06-24-2019, 09:02 PM
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Excellent read, I read all 15 pages at once. Iím interested in that hull design he made for zodiac. Really cool stuff. I see how one or two steps make sense, but 5??? Lol. I donít know enough, but I would say thatís excessive....
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Old 06-24-2019, 09:25 PM
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slightly higher planing speed.

Last edited by TeamBalla; 06-24-2019 at 09:51 PM.
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Old 06-24-2019, 09:49 PM
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I am on my second YF42 (stepped hull) and had a Venture 34 before (non-stepped). The only disadvantage of the stepped hull to me is that it falls off plane below 28-30 mph. So if you are often in nasty seas and want to go 15-30 mph the non-stepped would perform better. I could see wanting a non-stepped hull if you can't go above 35 mph a lot of the time due to sea conditions.
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Old 06-25-2019, 04:36 AM
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Originally Posted by Bront Antwoord View Post
Excellent read, I read all 15 pages at once. Iím interested in that hull design he made for zodiac. Really cool stuff. I see how one or two steps make sense, but 5??? Lol. I donít know enough, but I would say thatís excessive....
Donzi 38 ZRC was redesigned with 5 steps about 2005. Never rode in one but people tell me thats the most stable Deep V hull they rode in at 100 plus.
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