Is Semi-Displacement Hull better than Deep V Hull ?

[ShaneAtSea]

Daughter has done N.Y -Palm Beach 4 times with IPS touched the bottom a few times and 1 haul out for damaged props. Due to wait for new props to arrive they now carry spares and have never needed them!

I dont mind touching the bottom etc.....snapping off the whole POD drive is quite scary though

And lobster pots are a bit of a hazard on the ICW too apparently

YBW did some great articles on someone doing 'The Great Loop' in a Princess V48

Links are below...

Great Loop: Princess V48 owner preparing for the adventure of a lifetime

Cruising the Great Loop: From Miami to Savannah in a Princess V48

Cruising the Great Loop: From Savannah to Norfolk in a Princess V48

 

[MapisM]

You really know how to take the fun out of it dont you?
You'd probably tell me not to buy a 'Lancia - Integrale' because it has terrible electrical wiring regardless of how much fun it is to drive

I never would do that, and in fact I even considered an Evo II, before their quotations went ballistic.
And now I can only regret not having gone for it, but that's water under the bridge.

If you are looking for a similar fun in a boat, you'd better consider something much smaller and faster than any trawler-esque boat the market has to offer.
OTOH, for actual cruising, I'd rather have something dependable, precisely because I don't like to take the fun out of it!
But each to their own, of course.

 

[PowerYachtBlog]

Good hull, pretty standard Bernard Olesinski for UK made boats. There's an experienced owner on Youtube who motored his up from the Med then sailed it to Russia.

Not sure anyone would want to do that in an Itama !

You would not do it cause it is open, and you might freeze to dead, thought with the big windshield in reality Itama let little wind come your way.
For example a Fairline Targa 37 lets more windage at the helm then an Itama does, even though many would think it is not so.
The rest it would be much better and more comfortable. Also in that Princess is not like they are taking heavy seas if I remember well.

A Vee hull with 15 degrees closing aft is called a medium Vee.
Porto summed it pefect; 20 plus closing aft is a Deep-Vee, 10-19 is a medium-Vee, 0-9 is a flat-Vee.

 

[marcochi76]

Coming back to the medium-Vee Princess V39, I was very pleased when I saw this video and the conditions it went through.
I think I will personally do my best to avoid finding myself in a similar situation!
but glad to see that the boat was still in 1 piece

 

[Portofino]

Coming back to the medium-Vee Princess V39, I was very pleased when I saw this video and the conditions it went through.
I think I will personally do my best to avoid finding myself in a similar situation!
but glad to see that the boat was still in 1 piece

Cross purposes here he says he dropped to 2 knots and the rest looked pretty much D speed
I have based my posts on planing NOT dropping off it and entering rolly polly D speed territory.
My old Porto 35 I had to do as per vid . He can‘t plane as I explained above the mid and stern section 15 degree deadrise is too flat and it would crash badly ,

This Itama with a 23 degree dead-rise not so if it takes off it lands softly , her I might slow to low 20 s in those head seas once I was down to 18 in similar , but never off planing .Full flaps down gets the pointy end in extends the water line L .

Sometimes if it’s a bit more on the beam you are better off going faster because of the extra dynamic stability.
Or if you wanna keep the speed nearer 25 + then chart a diagonal path through , not quite head on .

 

[Chris H]

I guess so

Whats your point?

Logs are on top of the water, IPS are below the boat........

 

[MapisM]

Logs are on top of the water, IPS are below the boat........

Hard to argue with that.
But trust me, when planing at speed, any heavy-ish log right in front of you, that for some reason (typically, choppy sea) you don't see, is NOT pushed sideways by the hull fast enough to avoid the props.
And I learned that the hard way, with my very first sea boat, while cruising at 35 kts.
I never understood what exactly did I hit, but it managed to destroy both props in one of the DP outdrives.
And with zero collision signs anywhere along the hull, go figure. Not even a scratch on the antifoul.
That's a realistic risk also with a boat like yours, methinks.

 

[ShaneAtSea]

Hard to argue with that.
But trust me, when planing at speed, any heavy-ish log right in front of you, that for some reason (typically, choppy sea) you don't see, is NOT pushed sideways by the hull fast enough to avoid the props.
And I learned that the hard way, with my very first sea boat, while cruising at 35 kts.
I never understood what exactly did I hit, but it managed to destroy both props in one of the DP outdrives.
And with zero collision signs anywhere along the hull, go figure. Not even a scratch on the antifoul.
That's a realistic risk also with a boat like yours, methinks.

Your a bigger man then me

I couldnt even be bothered to reply to his comment

 

[MapisM]

In fairness, Chris might have commented with slow speed cruising in mind, since you were talking of the ICW.
And if so, he had a point, because it's certainly much easier to avoid logs or whatever, at slow speed and in calm waters.
BTW, I even doubt that a log can actually reach the props, when cruising at one digit speed, because the hull has enough time to push it sideways.
In fact, I kept the express cruiser I was referring to before for just 3 years, as opposed to a pure displacement trawler that I kept for 17, using her extensively also at night.
Yet, the only prop damage I ever had was with the first rather than with the latter...

 

[ShaneAtSea]

In fairness, Chris might have commented with slow speed cruising in mind, since you were talking of the ICW.
And if so, he had a point, because it's certainly much easier to avoid logs or whatever, at slow speed and in calm waters.
BTW, I even doubt that a log can actually reach the props, when cruising at one digit speed, because the hull has enough time to push it sideways.
In fact, I kept the express cruiser I was referring to before for just 3 years, as opposed to a pure displacement trawler that I kept for 17, using her extensively also at night.
Yet, the only prop damage I ever had was with the first rather than with the latter...

The reason i didnt respond to Chris's comment is because im getting a bit bored that everytime i write something on this site someone has to nit pick every aspect of the thing ive said. The ICW has to be constantly dredged because of sand banks, mud backs, theres submerged logs, semi submerged logs, floating debris, lobster pots etc etc etc

Ive spoken to a lot of dealers and boat owners in the USA & Florida who have told me to get shafts or even outboards for the ICW. They said i can get IPS but there would be places i just couldnt go to or would be really stupid to attempt.

They also said not to buy anything bigger than 50ft, maximum draft of 5ft and with a bridge clearance of 17ft

Im sure he was just being humorous but i didnt find it particularly helpful

Anyway....here s little reminder as to why i want to boat in Florida and why id probably hit a log because im a little distracted

 

[Portofino]

The reason i didnt respond to Chris's comment is because im getting a bit bored that everytime i write something on this site someone has to nit pick every aspect of the thing ive said. The ICW has to be constantly dredged because of sand banks, mud backs, theres submerged logs, semi submerged logs, floating debris, lobster pots etc etc etc

Ive spoken to a lot of dealers and boat owners in the USA & Florida who have told me to get shafts or even outboards for the ICW. They said i can get IPS but there would be places i just couldnt go to or would be really stupid to attempt.

They also said not to buy anything bigger than 50ft, maximum draft of 5ft and with a bridge clearance of 17ft

Im sure he was just being humorous but i didnt find it particularly helpful

Anyway....here s little reminder as to why i want to boat in Florida and why id probably hit a log because im a little distracted

Keep plugging away Shane .
I do re dead rise / hull form .
Don’t let the B stards grind you down .

On Florida what do the dealers say about those coastal bits , your route showing the Keys looks interesting.
Also no doubt after a while the Bahamas will enter into your sights , which swings it back towards seakeeping , speed and rough weather .
There will be the best compromise out there re the shallow parts of the ICW , the haul over inlet scenarios , and a week end bash in the Bahamas or the keys and simply a moored up “wet “apartment

The fun is finding / researching.

Whats ever one else running ?

 

[MapisM]

Anyway....here s little reminder as to why i want to boat in Florida and why id probably hit a log because im a little distracted

You must be younger than me I suppose, 'cause that video shows why I do NOT want to boat in FL.
These days, I tend to prefer a fantastic sea (of which there's practically none anywhere, along the whole US E coast) rather than sex, drug and rock & roll, you know...

PS: if ICW boating really is an itch that you want to scratch, I'd second the suggestion of whoever recommended you an o/b boat.
And you can forget Porto's obsession on hull shape, 'cause around there, even a pontoon will do - and it might be in fact a good choice!

 

[Portofino]

It’s not just the under water strike per se , that risk is there equally what ever propulsion system you end up with , it’s the hassle factor .
Its likely not even a $issue unless your insurance Co excludes fishing line and such like ?
Fishing line = emulsified oil = big rebuild bill for some one the owner .

Cauliflowering IPS props damages the gear set + much more .Hear the pod has misaligned as well .
Theres the parts availability and skill set of techs to fix it to consider as well .

Where as this has a better prognosis on all the levels .Same object strike .
A N other yard + prop shop job .Loadsa parts eg cut less bearings etc etc .

 

[ShaneAtSea]

Keep plugging away Shane .
I do re dead rise / hull form .
Don’t let the B stards grind you down .

On Florida what do the dealers say about those coastal bits , your route showing the Keys looks interesting.
Also no doubt after a while the Bahamas will enter into your sights , which swings it back towards seakeeping , speed and rough weather .
There will be the best compromise out there re the shallow parts of the ICW , the haul over inlet scenarios , and a week end bash in the Bahamas or the keys and simply a moored up “wet “apartment

The fun is finding / researching.

Whats ever one else running ?

Yeah definitely planning on heading out to the Bahamas.

Its 180 nautical miles so around 12 hours at 15knts (Early start)

Also, I love Key West so that would be another fairly adventurous trip at 204 nautical miles with a couple of stops along the way.

I was only joking about the video. Was just lightening the mood.

The 'Haulover Inlet' is not my idea of a good time. Although everyone loves a bit of Sex & RockNRoll. Just not the 3 day hangovers

Give me a glass of wine, a Mill Pond and a sunset any day.

 

[colhel]

Anyway....here s little reminder as to why i want to boat in Florida and why id probably hit a log because im a little distracted

Typical Nimbus owners rallye

 

[Chris H]

The reason i didnt respond to Chris's comment is because im getting a bit bored that everytime i write something on this site someone has to nit pick every aspect of the thing ive said. The ICW has to be constantly dredged because of sand banks, mud backs, theres submerged logs, semi submerged logs, floating debris, lobster pots etc etc etc

Ive spoken to a lot of dealers and boat owners in the USA & Florida who have told me to get shafts or even outboards for the ICW. They said i can get IPS but there would be places i just couldnt go to or would be really stupid to attempt.

They also said not to buy anything bigger than 50ft, maximum draft of 5ft and with a bridge clearance of 17ft

Im sure he was just being humorous but i didnt find it particularly helpful

Anyway....here s little reminder as to why i want to boat in Florida and why id probably hit a log because im a little distracted

The reason i didnt respond to Chris's comment is because im getting a bit bored that everytime i write something on this site someone has to nit pick every aspect of the thing ive said. The ICW has to be constantly dredged because of sand banks, mud backs, theres submerged logs, semi submerged logs, floating debris, lobster pots etc etc etc

Ive spoken to a lot of dealers and boat owners in the USA & Florida who have told me to get shafts or even outboards for the ICW. They said i can get IPS but there would be places i just couldnt go to or would be really stupid to attempt.

They also said not to buy anything bigger than 50ft, maximum draft of 5ft and with a bridge clearance of 17ft

Im sure he was just being humorous but i didnt find it particularly helpful

Anyway....here s little reminder as to why i want to boat in Florida and why id probably hit a log because im a little distracted

I wasn’t taking the piss, just thought it strange one of your main crieterior for not going for IPS is hitting floating logs at semi or displacement speeds, which I thought would be very unlikely.........anyway, life’s too short to piss about going at displacement speeds

 

[ShaneAtSea]

I wasn’t taking the piss, just thought it strange one of your main crieterior for not going for IPS is hitting floating logs at semi or displacement speeds, which I thought would be very unlikely.........anyway, life’s too short to piss about going at displacement speeds

You might be right.

I am known to be a bit impatient.....i'll probably just give in a buy an Itama from Portafino

Only joking....if i was going to buy an open top speed boat id buy the Windy 37 Shamal ......its gorgeous ❤

 

[stelican]

Typical Nimbus owners rallye

Control your Grandaughters

 

[ShaneAtSea]

[

Keep plugging away Shane .
I do re dead rise / hull form .
Don’t let the B stards grind you down .

On Florida what do the dealers say about those coastal bits , your route showing the Keys looks interesting.
Also no doubt after a while the Bahamas will enter into your sights , which swings it back towards seakeeping , speed and rough weather .
There will be the best compromise out there re the shallow parts of the ICW , the haul over inlet scenarios , and a week end bash in the Bahamas or the keys and simply a moored up “wet “apartment

The fun is finding / researching.

Whats ever one else running ?

Coincidentally.....Tristan on the SuperYacht AWOL channel has just released a video of them going up the ICW in Fort Lauderdale where my boat will be kept.

They go quite near my house actually.

As you can see its very leisurely and thats why i dont really need a sports boat

Its all about relaxing and looking cool I think Absolute Naveta 52 would be perfect

 

[MapisM]

I think Absolute Naveta 52 would be perfect

Nah, a pontoon with outboards is just the ticket, as I already suggested - and now proved also by the video...