Anders_P42
Well-Known Member
Modern boats are starting to include Gyro options, Princess 43, 49, 52 Ferretti 450 etc.
IPS
- Thread starter rubberduck
- Start date
Modern boats are starting to include Gyro options, Princess 43, 49, 52 Ferretti 450 etc.
rubberduck
Well-Known Member
Having looked into it, it would appear that is the way to go.
Rgrwynne
Active Member
Have IPS 600's on my Cranchi 43 Mediterainee . Last used in June did Ibiza return from Costa Blanca. Got amazing fuel consumption, neighbouring boats who do same trip could not believe it.
Boat has remained in berth since June and just done same trip. Had diver down to check hull, mainly because of oil in the Marina from neighbouring fishing fleet !!!!!!, and apart from crud around water line, which he removed all ok.
Went from San Pedro to San Antonio, Ibiza, 30 knots all the way in good conditions at 3000 rpm , a distance of about 120 nm., fuelled up in San Antonio, 550 litres .
Boat was carrying 4 adults, plus stocked with food and more importantly plenty of booze for 14 days.
I was very pleased with that.
Cheers,
Roger
Boat has remained in berth since June and just done same trip. Had diver down to check hull, mainly because of oil in the Marina from neighbouring fishing fleet !!!!!!, and apart from crud around water line, which he removed all ok.
Went from San Pedro to San Antonio, Ibiza, 30 knots all the way in good conditions at 3000 rpm , a distance of about 120 nm., fuelled up in San Antonio, 550 litres .
Boat was carrying 4 adults, plus stocked with food and more importantly plenty of booze for 14 days.
I was very pleased with that.
Cheers,
Roger
D
Deleted User YDKXO
Guest
Thats pretty much bang on 1nmpg which is good but not outstanding. Plenty of 40-45ft shaftdrive sportscruisers would get close to that albeit maybe not at 30kts
MapisM
Well-Known Member
Agreed - not to mention those on outdrives, which also have their drawbacks as we all know, but indeed are fairly more efficient than shafts.
In fact, coming to think of it, I believe that in the latter version of the Cranchi 43 Med, now called 44, they abandoned IPS and returned to outdrives...
PowerYachtBlog
Well-Known Member
The 44 is a totally different hull, she is slimer then the 43. Cranchi 43 is very bang on with IPS, they (Cranchi) did there job pretty well and with IPS600 and clean bump should top 38 knots.
A similar efficient boat on shafts would be the old 43 Targa which was very good at around 26-28 knots.
I think the only Cranchi beater in that size and IPS efficiency would be the Absolute 47 STC.
Surely most stern drive boats of that size as the old Absolute 45, Gobbi 425 and even a Fairline 44 Targa GT with D6 370 would have a better efficiency.
Sometimes over power can play the trick better in planning hulls.
Last edited:
MapisM
Well-Known Member
I suppose you meant IPS efficiency, W?
Anyway, the point Deleted User was making still stands: based on the numbers posted by Rgrwynne, it's difficult to understand why he said that neighbouring boats found the fuel burn unbelievable.
Unless his neighbours are comparing a Cigarette with big block petrol engines, that is...
PowerYachtBlog
Well-Known Member
I suppose you meant IPS efficiency, W?
Anyway, the point Deleted User was making still stands: based on the numbers posted by Rgrwynne, it's difficult to understand why he said that neighbouring boats found the fuel burn unbelievable.
Unless his neighbours are comparing a Cigarette with big block petrol engines, that is...
FIxed
Sure IPS can be a bit better, like 10-20% to a shaft boat with similar displacement if it has a hull designed for it from the ground up.
I think Absolute is a prime example of this, and also the new Princess 49 should be pretty good by what I am seeing.
Its not the 30-40 plus number Volvo said IMO.
TBH with planning boats when you have plenty power to go 35 knots plus your efficiency always gets that 10-20% improvements at around 25 knots cruise speeds. * subject to hull type
An example 18 tons flybridge boat with IPS boat doing exact 30 knots and cruise at 23 knots shaft boat of similar size may be 20 tons displacement cause of larger engines and will do more or less the same liter to the mile, and will also go faster.
Rgrwynne
Active Member
At the end of the day it is what you are happy with. The speed differences are marginal and all the arguments for and against IPS drives vary. For example a test report comparing 2 identical sunseekers one IPS and one shaft drive showed a 40% fuel advantage with IPS . The same report said it varies very much with each boat.
I am happy, have reported facts and what neighbouring boats owners have said . There are many many variables effecting fuel use , a clean hull being just one !!!!
Enjoy your boating,
Cheers,
Roger
I am happy, have reported facts and what neighbouring boats owners have said . There are many many variables effecting fuel use , a clean hull being just one !!!!
Enjoy your boating,
Cheers,
Roger
PowerYachtBlog
Well-Known Member
To make exact comparison you have to go like with like. And IPS needs a dedicated hull so that is always very difficult to do.
I will be interested to know which Sunseeker you speak about. I know some of the bigger models are offered with both options (example Manhattan 65) but I do not have exact figures for this or other similar models. A friend of myn bought a new 65 Manhattan this year coming from an Azimut 62S with 1015hp Cats and shafts and he saying the Sunseeker is a bit more efficient even though she a bigger and heavier boat to the Azi.
What I know is that the old 2006-8 produced 47 Portofino was more efficient with Volvo 575hp shafts then IPS600 Volvo 435hp. That is a boat with the same hull used for both propulsions.
Then Sunseeker redesigned the hull for IPS only on the 48 Portofino which is more less still the same used on the San Remo 50 model.
Last edited:
PowerYachtBlog
Well-Known Member
Interesting official nos for the new Pershing 5X to continue with the IPS versus the others discussion.
5x with Volvo 725hp IPS950 speed 36 knots max 30 knots cruise range 285 nm at cruse
5x with Cats 1000hp and surface drives 45 knots max 41 knots cruise range 290 nm at cruise
5x with Volvo 725hp IPS950 speed 36 knots max 30 knots cruise range 285 nm at cruse
5x with Cats 1000hp and surface drives 45 knots max 41 knots cruise range 290 nm at cruise
Sishoe
Well-Known Member
My last 3 boats
Gobbi 425SC on KAD 300's - 30 knots with clean bum
Bavaria 420 Virtess on IPS 600's - used more fuel than the Gobbi but a lot heavier and could top out at 35 knots with clean bum
Cranchi Med 43 on IPS 600's better than both of the above (i think, not had the boat long enough but seems very good on fuel) as mentioned above tops out close to 40 knots with a clean bum.
rubberduck
Well-Known Member
Have now done a little research & if we are going to do this then boat needs to be bigger, & more expensive than we would like taking into account all the time it will sit there while we explore the USA, Australia etc.
With this in mind would it be viable to charter something like a 50ft sports hard top for the odd day or weekend here & there. Are there any good companies I could hand the running of the boat over to on the south coast, what state would it be in when we want to use it.
Also how many days would we be able to sell per year, in all honesty somewhere between 10-20 would work for us.
With this in mind would it be viable to charter something like a 50ft sports hard top for the odd day or weekend here & there. Are there any good companies I could hand the running of the boat over to on the south coast, what state would it be in when we want to use it.
Also how many days would we be able to sell per year, in all honesty somewhere between 10-20 would work for us.
Last edited:
Whitelighter
Well-Known Member
Depends what you want to sell it for. Everytime Ive looked at chartering on the southcoast its so laughably expensive Ive not bothered.
In most cases its cheaper to fly to the med, charter, come back
In most cases its cheaper to fly to the med, charter, come back
rubberduck
Well-Known Member
Are they getting customers who are willing to pay that sort of money ?
I suppose the question I should be asking is does anyone already involved in this sort of business want another boat on the fleet, in the form of a 50ft sports cruiser. They would need to provide crew etc. & make sure she is looked after, I would obviously get her coded etc.
Nigelpickin
Well-Known Member
How about spending the £300k on a holiday home; letting it out for say a 7% yield and then using the return to pay for chartering, esp if you are wanting to charter a Cat in the Bahamas, a riverboat on the Douro, a boats.co.uk boat in the med?
You'd maybe get a solid fortnight of chartering or more, a holiday in your chosen property location and hopeful a tax efficient investment....just a thought?
rubberduck
Well-Known Member
Its more about convincing SWMBO that its a good idea than making money tbh.
