MapisM
Well-Known Member
As an aside - and since I just looked at the spec sheets - I hadn't realised that M2 has the D rated WOSR. Very good choice.
Was that FL standard, or part of your custom requirements?
Denia to N Sardinia & Corsica
- Thread starter statgar
- Start date
Was that FL standard, or part of your custom requirements?
jfm
Well-Known Member
Yup, they are D rated and I run them at "C" level of usage tbh, so they will last for ever. I think the spec for the 1622 says full rebuild at 2m litres of fuel (Cat, sensibly, quote major service at litres of fuel used). 2m litres is more than the rest of my life
On sq78, FL offer the 1622 Cat and the 1360 MAN as tick box options. They have also done a few boats with the 22 litre MTU ~1500hp (which is a fine piece of engineering of course, but looks really tiny when you see it in the flesh).
Most FL sq78 customers nowadays choose the Cat 1622. Therefore, while I chose it, it wasn't really a customisation in any serious sense. It's a nice engine (not that MTU isn't also a beautiful thing in this size bracket, and that nice new 1800bhp MAN)
statgar
Well-Known Member
Thanks to all very helpful feedback, who would have thought the thread would go from a med passage to bore glazing, ECO boats and Cat ratings!
Nick H my boat is similar in that I use 6.2 ltrs/nm at 22 kts and the same at 25kts, my hull speed is 9.7 and I get 3.5 ltrs/nm, I have Volvo engine displays and have checked the 'used litres' from each tank on fill/fill and it seems to be very accurate.
JFM/Hurricane I like the idea of a night departure as I don't like going too fast in the dark (Can't afford IR's) so I'll probably end up enjoying an evening at Il Porto, Mahon, and then heading out, all I need is the crew!
Thanks again to you all.
Nick H my boat is similar in that I use 6.2 ltrs/nm at 22 kts and the same at 25kts, my hull speed is 9.7 and I get 3.5 ltrs/nm, I have Volvo engine displays and have checked the 'used litres' from each tank on fill/fill and it seems to be very accurate.
JFM/Hurricane I like the idea of a night departure as I don't like going too fast in the dark (Can't afford IR's) so I'll probably end up enjoying an evening at Il Porto, Mahon, and then heading out, all I need is the crew!
Thanks again to you all.
jfm
Well-Known Member
Ah that's excellent. Yes these are accurate to perhaps 1%. They accumulate the data from the engine ECU where it is telling the injectors how much fuel to squirt in
So long as you know the litres you can burn from brimming the tanks to when the engines have still not died but you are well into "red" on your gauges, you'll be fine because you can manage the crossing around that figure. You can actually measure your tanks with a tape measure to check FL's stated max litres, if you can get enough access
statgar
Well-Known Member
The only problem I do have is with the port tank from which my generator draws its fuel as I don't have a flow meter for it but I estimate about 5 ltrs p/h taking the genny hours at each fill up.
Good point about measuring the tanks, never thought of it! access is difficult but I will try. I confess to never going into the 'red' as the thought of running the electronic pumps dry (and the potential damage that can cause) really scares me although I should be warned in advance by the 'low pressure warning' an the VDU.
Thanks again for your interest and guidance
jfm
Well-Known Member
Yup, the blimmin genset thing. I've looked into flow metering for my gensets (Onan) but so far have not installed a solution:
1. I could fit maretron J2K100s as I have done with the main engines. These work the same as the Volvo bridge device you'll have on your boat - they take the gensets' j1939 data and put it onto the N2k network. Perfect, you'd think, but Maretron tell me this wont deliver fuel data onto the network, presumably because the Onan electronics don't "talk" this data http://www.maretron.com/support/kno...can+I+expect+to+see+on+the+NMEA+2000+network?
2. Fit floscan metering. Very expensive, and impossible to calibrate. If you look at the calibration routine for Floscan it is impossible to do when the genset shares its tank with the main engines. Also v expensive, and not as good engineeringly as #3 below I think
3. Fit the Maretron flow meter (which, like Floscan, you insert into the fuel lines) and which then create the correct data for N2k network. These would work well and I'll probably go with them when I get the time to install them. Cost is about £1000 per genset
http://www.maretron.com/products/ffm100.php
So, like you, I currently estimate fuel by taking the genset hours and using the fuel-per-hour table in the genset's manual
John100156
Well-Known Member
I suppose a crude solution: Small dedicated fuel tank to the Genny - electric pump, controlled by one high and one low tank sensor, hence known fixed volume in between the levels. Low level operates the electric pump which runs until high level cuts it off, a counter tells you how many fills and the new tank sender tells you how much is left in the genny fuel tank. You could even latch the counter so that time the electric pump operates it takes fuel from alternate main fuel tanks..... Mind you, damn site cheaper/easier to put in flow metering....;-)
Lozzer
Well-Known Member
JFM
My CAT 32's drink 100lph at 1106 rpm. This gives me circa 11 knots. I think the engine load is 22% but I'm guessing.
All I would suggest to the OP is weather is king.... If there is any doubt wait.. When the Mistral comes down it can cut up rough going across and without stabilisers it WILL be uncomfortable.
Also when refuelling consider Bonifacio instead of Sardinia. Last year we paid €1.85 in Porto Rotundo. If I recall Bonifacio was around €1.50
Also cheaper to moor in Bonifacio.
My CAT 32's drink 100lph at 1106 rpm. This gives me circa 11 knots. I think the engine load is 22% but I'm guessing.
All I would suggest to the OP is weather is king.... If there is any doubt wait.. When the Mistral comes down it can cut up rough going across and without stabilisers it WILL be uncomfortable.
Also when refuelling consider Bonifacio instead of Sardinia. Last year we paid €1.85 in Porto Rotundo. If I recall Bonifacio was around €1.50
Also cheaper to moor in Bonifacio.
jfm
Well-Known Member
All agreed. In summer it is quite a sketch getting fuel in bonifacio or Porto vecchio but all part of the entertainment boats q jumping I mean
These days you can book bonifacio berths on line very effectively.
Nick_H
Well-Known Member
Only > 18m I think, and OP has 14m boat.
MapisM
Well-Known Member
I understand it would be useful to monitor also the genset fuel burn, but why should you be worried about it, in the contest of the passage which is being debated?
I can't think of any reason why you should need the genset while cruising, on a Ph46.
I mean, you surely can live without a/c while under way.
And even if you don't have gas, and you need the genset for cooking, the time required is neither here nor there in terms of fuel burn....
Hurricane
Well-Known Member
Dont want to put anyone off but it was after Bonifacio that we discovered fuel bug on board.
I would still refuel there but I now have a strict bug treatment regime - I would advise everyone to treat for bug anyway.
jfm
Well-Known Member
jfm
Well-Known Member
Thanks hurricane. Always good to know this info
D
Deleted User YDKXO
Guest
What is your bug treatment regime, H? I've got a bit lazy about it myself but I feel I shouldn't be
Hurricane
Well-Known Member
Marine 16
Buy it in the UK and take it out with us.
Once, we checked it in as hold luggage but only just got away with it.
This year, I bought the large bottles of the stuff and a couple of smaller ones that is enough for a single treatment.
That way, I will use the smaller bottles and top them up from the larger ones.
This should mean that I don't have to faff around measuring it out of the larger bottles when we refuel.
Just tip one small bottle into each tank before filling.
One winter, I treated the fuel with the Marine 16 conditioner as well.
But these days, it is just the Marine 16 bug treatment.
This treatment is one that kills the bug rather than one that removes the water.
Our fuel has been crystal clear since using this treatment.
D
Deleted User YDKXO
Guest
Thanks Hurricane. I'll try Marine 16. I'm still using some old bottles of Startron that I bought many years ago and have probably degraded now but on the other hand, I've never suffered the fuel bug either (he says not trying to tempt fate
)