Fairline Turbo 36 ...consumption at displacement speeds?

[[27631]]

A question -
what performance/fuel economy would I hope for on a late 1980's fairline turbo 36 with a pair of tam60c's..[230..or 255 each].if I travelled on either 1 or both engines at displacement speeds...say 7-8 knots!!!? I am looking at one a fair way away...and need the range.It holds 1100 L {240 G]...must be a lot of owners of these here..!.......

 

[jfm]

A question -
what performance/fuel economy would I hope for on a late 1980's fairline turbo 36 with a pair of tam60c's..[230..or 255 each].if I travelled on either 1 or both engines at displacement speeds...say 7-8 knots!!!? I am looking at one a fair way away...and need the range.It holds 1100 L {240 G]...must be a lot of owners of these here..!.......

I don't have specific data on this boat but in 32foot w/l length at 7-8 knots you are beginning to push your bow wave. Whatever mpg you get at 7-8knots will be doubled at 5knots, so if your plan is to get maximum range keep this in mind

 

[Chris_d]

I would estimate about 3gph, but knock it back to 5/6knots and it would be 1.5gph, however as jfm was I think trying to say increase to 9/10knots and it will be 6/7gph!

 

[Deleted User YDKXO]

I owned a 1986 Turbo 36 with TAMD60C engines many moons ago but I can't remember ever thinking about running it at displacement speed because in those days, diesel cost less than 20p per litre However based on calculations I've done using fuel consumption data from subsequent boats, I would reckon that the Turbo 36 would give you about 3.5 nmpg at about 6kts which, as you can work out for yourself, would give you a safe range with 20% reserve of 670 nautical miles, say 600 nm to be on the safe side. As others have said, at 7-7.5kts, you're pushing the max hull speed so in order to maximise the range, you really need to be running at say 6kts rather than 7-8kts

 

[[27631]]

I owned a 1986 Turbo 36 with TAMD60C engines many moons ago but I can't remember ever thinking about running it at displacement speed because in those days, diesel cost less than 20p per litre However based on calculations I've done using fuel consumption data from subsequent boats, I would reckon that the Turbo 36 would give you about 3.5 nmpg at about 6kts which, as you can work out for yourself, would give you a safe range with 20% reserve of 670 nautical miles, say 600 nm to be on the safe side. As others have said, at 7-7.5kts, you're pushing the max hull speed so in order to maximise the range, you really need to be running at say 6kts rather than 7-8kts

Hi...........thanks...I figured about a litre a mile maybe...at 6 knots..ok.I need to get from Galicia to Benodet /Camaret in about Jan/Feb coming........-about 300-350
n.mls.-without the ups and downs ...and wanderings at that speed.-I am aware the boat will wallow about a bit at those speeds....but..its a long way round the inside ..done it a few times...puts over 400 n.mls on the trip...(2 litre/n.ml. I could live with)...12 Litres /hr-2 2/3 galls/hr...2 1/4 n.mls per gall!!
many thanks for the input

 

[jimmy_the_builder]

Hi...........thanks...I figured about a litre a mile maybe...at 6 knots..ok.I need to get from Galicia to Benodet /Camaret in about Jan/Feb coming........-about 300-350
n.mls.-without the ups and downs ...and wanderings at that speed.-I am aware the boat will wallow about a bit at those speeds....but..its a long way round the inside ..done it a few times...puts over 400 n.mls on the trip...(2 litre/n.ml. I could live with)...12 Litres /hr-2 2/3 galls/hr...2 1/4 n.mls per gall!!
many thanks for the input

Will your insurance cover you for Biscay at that time of year?

 

[Bandit]

I had a sedan 36, same hull so know the boat well.

To do a run like that in the summer, I would want to do the most deep and thorough service and inspection, engines, tanks, gear all 30 years old what will you find?

Biscay in Jan or Feb would not be my idea of a fun ride for a couple of days with a boat that is new to me, I would have thought that the chance of getting good settled weather for a week is zilch. One thing goes wrong and you are stuck with your crew until the next weather window whenever that Is, and the corresponding costs?

A boat that size I would look at road transport either to UK or Cherbourg and drop her in the water for the last leg. There are many UK boat transport Companies looking for return loads at reduced prices, I doubt if it would cost more and a lot more certain of your end cost and time scale.

 

[[27631]]

Hmmm...only 3rd party insurance as single handed usually..-by choice!!
I will have given the engines a fairly close inspection..and probably about 20 - 30 hours or more running...
Need settled weather for about 4 days-2 days to let the swell settle..2 days to cross.
It is no great hardship to be stuck in Vivero, Ribadeo,or Aviles for a few days or even weeks in winter.In fact I'd rather be there than in the UK!
Road would be too long ,...and not cheap,not many return loads from that part of Iberia!!

 

[Deleted User YDKXO]

Hi...........thanks...I figured about a litre a mile maybe...at 6 knots..ok.I need to get from Galicia to Benodet /Camaret in about Jan/Feb coming........-about 300-350
n.mls.-without the ups and downs ...and wanderings at that speed.-I am aware the boat will wallow about a bit at those speeds....but..its a long way round the inside ..done it a few times...puts over 400 n.mls on the trip...(2 litre/n.ml. I could live with)...12 Litres /hr-2 2/3 galls/hr...2 1/4 n.mls per gall!!
many thanks for the input

sundancer123, running planing boats like the Turbo 36 at displacement speeds is becoming more popular (or even necessary for some) because of increasing fuel costs so I for one would be interested in what kind of consumption figures you actually manage to achieve on a long run like this. I have to say that I wouldn't want to be on board with you because for sure, like any planing boat, she'll roll like a pig at 6kts in any kind of a beam sea. Best of luck and tell us how it went afterwards

 

[piratos]

Open Sea at Displacement Speed

Hi...........thanks...I figured about a litre a mile maybe...at 6 knots..ok.I need to get from Galicia to Benodet /Camaret in about Jan/Feb coming........-about 300-350
n.mls.-without the ups and downs ...and wanderings at that speed.-I am aware the boat will wallow about a bit at those speeds....but..its a long way round the inside ..done it a few times...puts over 400 n.mls on the trip...(2 litre/n.ml. I could live with)...12 Litres /hr-2 2/3 galls/hr...2 1/4 n.mls per gall!!
many thanks for the input

Forget about an open sea passage at 6 knots.
The boat is fine and engines suitable for the boat - but she has no or almost no keel at all -rudders are very small, and stearing at 6 knots is more than poor. Of course its possible to go with 6 knots in sheltered water, but in open sea you will need to go with speeds of aprox 8 knots and calculate some 13-1500 rpm with 12/15 ltrs per hour each motor.

 

[[27631]]

Forget about an open sea passage at 6 knots.
The boat is fine and engines suitable for the boat - but she has no or almost no keel at all -rudders are very small, and stearing at 6 knots is more than poor. Of course its possible to go with 6 knots in sheltered water, but in open sea you will need to go with speeds of aprox 8 knots and calculate some 13-1500 rpm with 12/15 ltrs per hour each motor.

Ah...yes...that was the thought I had in the back of my mind....I figured 8 kts to get decent steerage,but then the fuel consumption goes up big time!!.......25-30 litres an hour at 8-9 kt..Yes..sounds about right. Deleted User..I will update you if I do go ahead with this...

 

[burgundyben]

If you are single handed then you haven't got 3 blokes like me at 100kgs each on board. Perhaps you could carry enough extra fuel to plane across at say 15 to 18 knots?

 

[[27631]]

Hi.....dont think 300 kg would make much difference on a 9+ ton boat ...

 

[Bandit]

I replaced the Fuel tanks and engines in my Sedan 36 and I increased the fuel tanks to 1,750 litres, no problem.

Also consider using a bladder tank as a long range tank.

My view remains that Road is a serious contender price wise against on its own hull, costs can escalate with problems, I assume the OP's point was that his longest leg was across Biscay but he was coming from further south , south Portugal, south spain? return road transport is a serious option.

I consider planning to cross Biscay in the summer ok but in Jan or Feb is barking. You certainly would not have done it in that period in 2014.

 

[[27631]]

I have cut the corners in 3 of the last 5 winters in various boats...all at 6 or 7 kts....always Jan-April....Gijon to L'Sables d'Lonne....usually...240 'odd n.ml....the longest leg...thought I might cut straight across...saves 350'ish n.ml.!.......Its not a big deal if you dont have a timetable/itinery........And from Galicia road is onerous...Like La Coruna to UK...I dont think so.. police escort on roads due to width etc...nightmare..spanish police not being where they should on time!!!Quite a few tacho days.....

 

[PlanB]

There is a Turbo 36 for sale in Bray Marina which I know has been reallly well maintained - I have no connection with the sale, but do know the owner.

 

[superheat6k]

There is a Turbo 36 for sale in Bray Marina which I know has been reallly well maintained - I have no connection with the sale, but do know the owner.

And another on the Hamble !!! (with said TAMD60C engines)

 

[[27631]]

And another on the Hamble !!! (with said TAMD60C engines)

I was looking at one about half the price of this....similar spec.!!!

 

[[27631]]

thanks for the input...it would seem that 15-16 knts is the way to go...and bite the bullet re.fuel costs.And add some extra temporary tankage as suggested...

 

[burgundyben]

thanks for the input...it would seem that 15-16 knts is the way to go...and bite the bullet re.fuel costs.And add some extra temporary tankage as suggested...

I've sailed from Camaret to Ribadao, but also motored at 20 knots from Corunna to Camaret, its a planing boat, best on the plane.

If you had lots of people and gear on board, I'd be concerned about the load of fuel, but with only you onboard the extra fuel, and an easy means of getting into the tanks is doable.