mattysupra
Active Member
Hi, anybody know what a Azimut 52 with CAT3196 engines will burn per hour? Cruising speed of approx 23 knots.
Many thanks
Many thanks
Fuel consumption help - Azimut 52
- Thread starter mattysupra
- Start date
markc
Well-Known Member
I would think around 200 l/ph depending on fouling and load
jrudge
Well-Known Member
I have a squadron 58 that does about 9 lhr per nm when clean.
Consumption is mostly a matter of weight That is being moved. . Engines etc may have something to do with it at the margin but not much. So 7 lt per nm ? Will rise if hull is dirty , rough sea etc.
Consumption is mostly a matter of weight That is being moved. . Engines etc may have something to do with it at the margin but not much. So 7 lt per nm ? Will rise if hull is dirty , rough sea etc.
kashurst
Well-Known Member
I had a Sealine T50 with Volvo D9s that would lunch 160 l/hour at 23 kns. I would guess you will be nearer 180 l/hr.
Best not to dwell on that sort of thing. What ever you do ,don't keep any kind of written record.
Best not to dwell on that sort of thing. What ever you do ,don't keep any kind of written record.
MapisM
Well-Known Member
At 23kts, that means 8.7 litres per Nm, i.e. just about the same as jrudge's Sq58.
Apropos, before anyone rushes to buy one expecting to sip fuel as a sailboat, I'm pretty sure he meant 9 L/Nm, not L/hr... ?
Back to the Azi 52, she has been an extremely successful model for the yard, which they sold like hot cakes.
BUT, she's actually MUCH lighter and smaller than both your Ferretti and the Sq58 - more than the model name suggests.
In fact, I half recall that she was good for 34/35 kts WOT, with "only" 660hp each side.
With clean hull and props and engines running fine, I don't think she should burn more than 6 L/hr at 23 kts, i.e. 140 L/hr or so.
I should have a test of the boat somewhere in my library, btw.
I'll see if I can find it, but mattysupra shouldn't hold his breath...
Portofino
Well-Known Member
Cat 3196 660hp engine - any experience?
I get about 180L/Hr @1800 rpm .....with MAN 12.8 L inline 6 ,s ....similar size engines .
So anywhere from 180 to 200 I would have thought. As JRudge said weight and seasonal fowling may push that north of 200 L/hr
I get about 180L/Hr @1800 rpm .....with MAN 12.8 L inline 6 ,s ....similar size engines .
So anywhere from 180 to 200 I would have thought. As JRudge said weight and seasonal fowling may push that north of 200 L/hr
mattysupra
Active Member
Thanks, everyone. So by the sounds, worse case is around 200 liters per hour. If I'm lucky i will use 180ish?
Does anyone know the most economical cruise speed for the Azi 52?
Does anyone know the most economical cruise speed for the Azi 52?
mattysupra
Active Member
You might be able to help me here. Do you know the full spec of the Azimut 52? As in the correct size, weight etc? What I'm really struggling to find info on is its air draft. Any idea of how high the boat is? Asking as im planning on getting one back from Spain to the UK. Thankyou in advance.
Davy_S
Well-Known Member
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MapisM
Well-Known Member
TBH, I wrote my previous post by heart, though I was pretty sure of what I was saying, because it's a model which I considered in the past.
Now, I just searched my notebook files, in the hope to find an old test made by an Italian magazine which I had in mind, but with no luck.
I might still have it at home, among a pile of old paper magazines, but frankly you are likely to have sold the boat by the time I might find the strength to dig through that...
On the other hand, since as I said it has been a very popular model, I googled a bit for it and found this old Boating Magazine test.
Interestingly, it shows even better fuel burn numbers than I previously guessed (around 5.5 L/Nm), in spite of the fact that my estimate was already the most optimistic by far, among all others.
But as always, take those numbers with a pinch of salt: magazine tests are often made in more than ideal conditions, hardly replicable in practice.
Some impressive results nonetheless, top speed included, considering also the hull deadrise of 18°, pretty deep for a flybridge.
I'm afraid air draft is not mentioned, though.
And I guess that you will struggle to find it, because it's rarely included among relevant dimensions, particularly for these boats which are't exactly meant for canal cruising...
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Phildorset
Well-Known Member
Did you get the big blue owner handbook with the boat... I'm pretty sure that the air draft would be amongst the specs in that - I seem to remember it is in mine...?
D
Deleted User YDKXO
Guest
My last boat was a Ferretti 53 with Cat 3196 engines. I think the Ferretti 53 is heavier than the AZ52 so my figures may be slightly on the pessimistic side but these are the fuel consumption figures I recorded from the engine instrumentation at various speeds. Boat had a clean bottom and was about 50% full of fuel and water
MapisM
Well-Known Member
Indeed - about 5T heavier and also beamier, by one foot or so. Both relevant differences, at this size.
It's no coincidence that the AZ52 (nice and very successful as she was) was actually born as a 50.
So, even discounting a bit the numbers in Boating Magazine, and assuming that the AZ52 is a 6 L/Nm boat, the 6.8 L/Nm which you got from your F53 are perfectly consistent, imho.
Apropos, I forgot to mention one thing that mattysupra might be interested in:
The boat which is being discussed should have the Cat digital displays (as I recall, they were an option with the 3196, so I'm not positive about this).
If that is the case, it's possible to see the fuel burn in real time, making any guesswork pointless.
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PowerYachtBlog
Well-Known Member
They burn about 6 liters per hours. Ferretti 53 is much heavier boat and at around 25 knots are always going at about 7.5 liters per miles.
The Azimut AZ50 (95 to 97) was 14 t dry about 14.5 for the 52, where apart adding a bathing platform they improved also other construction details. None the less a good boat, has also an Olesinski hull.
I think they sold over 250 over them in total. Still a researched boat for its three cabins layout. They are just over 17 tons loaded.
She was I think one of the first Azimut's which apart the hull was full Diab cored.
The Azimut AZ50 (95 to 97) was 14 t dry about 14.5 for the 52, where apart adding a bathing platform they improved also other construction details. None the less a good boat, has also an Olesinski hull.
I think they sold over 250 over them in total. Still a researched boat for its three cabins layout. They are just over 17 tons loaded.
She was I think one of the first Azimut's which apart the hull was full Diab cored.
jrudge
Well-Known Member
mattysupra
Active Member
Hi, yes it has the digital displays. Do you have any info on how you change what the displays show? thanks
MapisM
Well-Known Member
LOL, why am I not surprised to read your question?
God only knows what some Cat engineer must have smoked, when he designed those so-called EMS instruments!
The fact that they were among the first (possibly THE first, for Cat - not sure about that) digital instruments is the only excuse for the weird analogue/digital combination that you must have seen.
I am attaching the only documentation I found about them, when I was evaluating some 3196-powered boats.
It doesn't say a lot, but in pages 4 and 5 you can at least see what data they can display, and how to scroll through them.
Trouble is, the scroll control, i.e. the forward and backward switches mentioned at page 5, are NOT in the instrument itself!
They were in fact placed in a very small separate keypad (black, IIRC), and it was up to the boatbuilder to choose where to place them.
But don't ask me where exactly Azi placed the keypad in the 52...
Besides, there was also another Cat instrument, called CMS, which was a sort of single block grouping all the three EMS displays.
I don't have any documentation about it, but a quick search pointed me to this video, just to give you an idea of what I mean.
I'm pretty sure that Ferretti used the EMS on their 3196 powered 53, but I can't remember what Azi fitted on the 52.
Otoh, I think that the logic of separate keypad was valid for both instruments.
Phildorset
Well-Known Member
LOL, why am I not surprised to read your question?
God only knows what some Cat engineer must have smoked, when he designed those so-called EMS instruments!
The fact that they were among the first (possibly THE first, for Cat - not sure about that) digital instruments is the only excuse for the weird analogue/digital combination that you must have seen.
I am attaching the only documentation I found about them, when I was evaluating some 3196-powered boats.
It doesn't say a lot, but in pages 4 and 5 you can at least see what data they can display, and how to scroll through them.
Trouble is, the scroll control, i.e. the forward and backward switches mentioned at page 5, are NOT in the instrument itself!
They were in fact placed in a very small separate keypad (black, IIRC), and it was up to the boatbuilder to choose where to place them.
But don't ask me where exactly Azi placed the keypad in the 52...
Besides, there was also another Cat instrument, called CMS, which was a sort of single block grouping all the three EMS displays.
I don't have any documentation about it, but a quick search pointed me to this video, just to give you an idea of what I mean.
I'm pretty sure that Ferretti used the EMS on their 3196 powered 53, but I can't remember what Azi fitted on the 52.
Otoh, I think that the logic of separate keypad was valid for both instruments.
super useful info MapisM, it just so happens that this week I'm having my old suit of these replaced with Axiom screens - I think the electronics guys might find your PDF info useful, thank you for posting this.
MapisM
Well-Known Member
U R welcome, but beware of one thing when replacing instruments.
Unfortunately I can't be very specific, but I half remember to have read that the earliest electronically controlled engines did not comply with the later released standard communication protocols, on which modern instruments are based.
And I'm afraid that Cat 3196 might well be among these engines.
I'd rather ask an official Cat dealer, who should be able to confirm or correct what I'm saying, before forking out any relevant amount of money for new equipment.
Unfortunately I can't be very specific, but I half remember to have read that the earliest electronically controlled engines did not comply with the later released standard communication protocols, on which modern instruments are based.
And I'm afraid that Cat 3196 might well be among these engines.
I'd rather ask an official Cat dealer, who should be able to confirm or correct what I'm saying, before forking out any relevant amount of money for new equipment.
Phildorset
Well-Known Member
fair point - thanks for the warning, and yes, we did do some homework before starting on the change over, I think it is a bit of kit from Yacht Controller that takes off from the diagnostic sockets on the c12's and then converts the signals to the Raymarine standard. the chaps installing certainly are confident that all is going to be available on the Axioms.