Absolutely the most gorgeous boat in the world

Bouba said:
The Boat Show Channel always gives weight and fuel consumption, brands like Absolute are usually at the cutting edge of vacuum infusion and exotic materials so hi end boats are about 20% lighter. Of course IPS engines are smaller than their designation, so must add to the lightness and fuel efficiency.
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Not so sure about that. I managed to find this test of the Navetta 64 which suggests that its weight is 41.7t which is heavier than the Manhattan 68 and Squadron 68. In fact its heavier than my Ferretti 630 which is a bit of a fat bastard at just under 40t. So if its full of exotic lightweight materials, I dont know where they are:)


The video suggests that the fuel consumption at cruising speed is constant at around 12l/nm which is equivalent to 0.38 galls per nm which is very similar to my boat. Not surprising considering their similar weights but there doesnt seem to be any consumption advantage from the IPS drives at all. So with a 3600L tank and 10% safety that gives a range of 270nm. Not awful but not great either

Dont get me wrong. I love the styling and interior space of these Navetta boats (and the Azimut Magellanos too) and I'd happily go fair weather cruising in the Med in any of them but I just dont see that their cruising capabilities are any better than a run of the mill planing boat from other builders
 
Deleted User said:
Not so sure about that. I managed to find this test of the Navetta 64 which suggests that its weight is 41.7t which is heavier than the Manhattan 68 and Squadron 68. In fact its heavier than my Ferretti 630 which is a bit of a fat bastard at just under 40t. So if its full of exotic lightweight materials, I dont know where they are:)


The video suggests that the fuel consumption at cruising speed is constant at around 12l/nm which is equivalent to 0.38 galls per nm which is very similar to my boat. Not surprising considering their similar weights but there doesnt seem to be any consumption advantage from the IPS drives at all. So with a 3600L tank and 10% safety that gives a range of 270nm. Not awful but not great either

Dont get me wrong. I love the styling and interior space of these Navetta boats (and the Azimut Magellanos too) and I'd happily go fair weather cruising in the Med in any of them but I just dont see that their cruising capabilities are any better than a run of the mill planing boat from other builders
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A Navetta should only be compared to an appartement building.
 
Bouba said:
A Navetta should only be compared to an appartement building.
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Btw I forgot to ask. Why have you got a statue of Elvis outside your house and not Harry Kane or The Special One?
 
TonyR123 said:
I had ignored weight so not the most accurate of comparisons I admit. It was more that the absolute fuel tank is almost the same as the pearl 62, whose range is stated at 250 miles at cruising speed (whatever that is) and I am sure most new boats these days have a fuel tank size for a range of 250nm. Although just read a review on Absolute 62 fly that has 2600 litre tanks and range is anything from 269nm to 309nm so I guess the Absolute 60 will do this at least?
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Just been looking at details of the Pearl 62 on their website. V impressive the way they've managed to design in 4 cabins into a 62 footer. I guess that really shows the benefit of IPS
 
Deleted User said:
The video suggests that the fuel consumption at cruising speed is constant at around 12l/nm which is equivalent to 0.38 galls per nm which is very similar to my boat.
Click to expand...

Ummm, Mike, I think you are being a bit too ambitious with the 'Man Maths' here - my calculator tells me that 12 litres / mile is equivalent to 2.64 gallons / mile.
Or 0.38 miles / gallon. :)
 
The problem with IPS boats is that most boat are just powered right (or slightly under powered) with them. No extra power, which is what the Ferretti (Italian builders) mentality up until 2010.

So a Navetta 64 with two 12 liters 1000hp engines at 23 knots cruising speed you are using 80/90% load to go at that speed. While with your Ferretti with twin 15 liters Man and 120hp is running at what 60%.
We have to remember that up until 2010 a 12 liters engines used to be found in what 15/17 meters maximum boats.

I think IPS has worked best in the triple engines Azimut S series. New Azimut 53 might also do very well since in it they have put some decent engines.

Sometimes it is not a problem of IPS it is a problem that builders seem to want the believe the hype that a Volvo D13 1000hp an IPS1350 is equivalent to a 1300hp other engine, and this will never be the case.
With all the benefits of IPS I think at most you scrub out 100hp. But HP is easy the real game on the water is torque and there is no real replacement for CC (ltr) for that whatever moniker Volvo invents.
So that is why a Ferretti 630 or DP 55 from 2000 consumes same as an IPS boat for 2020.
Yes a new boat of similar size will have more bells and whistles big full beam cabins all around hard-tops on flybridge, new fore deck settees and dinette so boats have become rather busy nowadays.
But keep in mind that most boats today are build with this in mind first, rather then the hull and propulsion.
In the past the mentality was lets make this thing run good, so if it makes two weeks of wind in August u can still enjoy yourself.
Now the mentality is lets make this more as home for you, so if it makes two weeks in August you have more space to enjoy in the marina.
 
Bajansailor said:
Ummm, Mike, I think you are being a bit too ambitious with the 'Man Maths' here - my calculator tells me that 12 litres / mile is equivalent to 2.64 gallons / mile.
Or 0.38 miles / gallon. :)
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Spot on Bajansailor. Brain fade caused no doubt by Covid:D Youre right it should be 0.38 nautical miles per gall
 
Bouba said:
You know that you are missed on the Brexit forums, the remainers are losing all the arguments
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There arent arguments over Brexit. Events have now proven beyond doubt it was a dumbf**k thing to do and you dont need me to point that out. Anyway the mods have banned me from all non boaty forums for eternity and beyond so youre on your own

Anyway why should you care now that youre French?
 
PowerYachtBlog said:
The problem with IPS boats is that most boat are just powered right (or slightly under powered) with them. No extra power, which is what the Ferretti (Italian builders) mentality up until 2010.

So a Navetta 64 with two 12 liters 1000hp engines at 23 knots cruising speed you are using 80/90% load to go at that speed. While with your Ferretti with twin 15 liters Man and 120hp is running at what 60%.
We have to remember that up until 2010 a 12 liters engines used to be found in what 15/17 meters maximum boats.

I think IPS has worked best in the triple engines Azimut S series. New Azimut 53 might also do very well since in it they have put some decent engines.

Sometimes it is not a problem of IPS it is a problem that builders seem to want the believe the hype that a Volvo D13 1000hp an IPS1350 is equivalent to a 1300hp other engine, and this will never be the case.
With all the benefits of IPS I think at most you scrub out 100hp. But HP is easy the real game on the water is torque and there is no real replacement for CC (ltr) for that whatever moniker Volvo invents.
So that is why a Ferretti 630 or DP 55 from 2000 consumes same as an IPS boat for 2020.
Yes a new boat of similar size will have more bells and whistles big full beam cabins all around hard-tops on flybridge, new fore deck settees and dinette so boats have become rather busy nowadays.
But keep in mind that most boats today are build with this in mind first, rather then the hull and propulsion.
In the past the mentality was lets make this thing run good, so if it makes two weeks of wind in August u can still enjoy yourself.
Now the mentality is lets make this more as home for you, so if it makes two weeks in August you have more space to enjoy in the marina.
Click to expand...
I wonder if there will be a return to hull first engines ( propulsion) close second mantra ?
Not with inexperienced newbies but the next boat .

Agree i think volvo are getting out of there depth bolting on add ons to the 12 L straight 6 .

The others like MAN , CAT , MTU Cummins have been doing V8s and 12 s and 16 s for years .

I would want to run at 80 % load or lower , I do Infact and would not be happy having to cane a 60/70 ftr near 90 % at 22 knots or less with seasonal fouling .

As always test drive and helm them see for yourself.

The last boat I did 100 % load was a Itama 62 out of Monaco 2350 rpm sat at 42 knots .
Iirc it’s 80 % was 34 .....perfect . Silky smooth purring away .
Talking 1360 Hp V 12 s iirc 24 L not 12 L

Even my Itama 42 /48 a 13/14 M boat has 12.7 L not IPS 600 D 6 s urgh !
 
PowerYachtBlog said:
The problem with IPS boats is that most boat are just powered right (or slightly under powered) with them. No extra power, which is what the Ferretti (Italian builders) mentality up until 2010.
Click to expand...

Agree entirely. Most builders (including Ferretti) now install the minimum size engine they can get away with that they calculate will get the boat to the magic 30kts, to save on cost. The reality of course is that with cruising gear onboard and hull fouling, the boat wont get anywhere near 30kts most of the year. Just by way of example my Ferretti 630 has MAN V12 engines in it and easily gets past 30kts even with a fouled hull. The engines never feel stressed and it feels like they always have power in reserve. The nearest new model in Ferretti's range is the 670 which has a similar weight to my 630 but now Ferretti fit MAN V8 engines rather than the V12s fitted in my boat. Yes nominally they are the same power at 1200hp but you just know that the V8 engines will operating closer to their limit at high planing speeds than the V12s. One of the many reasons I've stuck with the 630 rather than trading up
 
Deleted User said:
There arent arguments over Brexit. Events have now proven beyond doubt it was a dumbf**k thing to do and you dont need me to point that out. Anyway the mods have banned me from all non boaty forums for eternity and beyond so youre on your own

Anyway why should you care now that youre French?
Click to expand...
Glad to see that you are as eloquent as ever ? Right now I am at the vaccine centre, I’ve just been Pfizered, all I need now is my second coat for that all round protection
 
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