cruising range fuel/consumption

Similar set up - well a Seahawk anyway
Volvo 2003,
160 litres in tank,
2,5 litres per hour and 5 knots at 2,300 r.p.m.

3 blade propeller, courtesy of previous owner.

60 hours cruising and 25 litres back-up in the stern locker.
That puts a lot of places in range.
 
HR34
140L
Volvo 2030, 2 bladed folding
2L/hr @ 6.5kn
Range theoretical: 70 hrs or 400+ miles

The longest legs I have done were 350 miles. On one occasion the gauge was low after 40 hrs motoring but the meter was non-linear and the tank about 1/3 full.
 
52ft 34 tonne Pilot Cutter
Yanmar 4JH2 89hp
About 1.5 gallons per hour at 6 knots in flatish water
I.e. about 1 litre per nautical mile
About 1000 litres of tank capacity

Range - more than enough to get in an out of the marina
 
Ocqueteau 645, Nanni N4 115HP engine with 100L tank. Figures calculated from manufacturer's data and measured speed/RPM, hence the variability. Looks like economy drops with increasing speed until reaching planing speed when mpg plateaus.

RPM ..Knots.. MPH.. L per H.. L per Mile ..range
1400 .. 7.2 .. 8 .. 3 .. 0 .. 331
1600 .. 7.8 .. 9 .. 4 .. 0 .. 224
1800 .. 8.5 .. 10 .. 7 .. 1 .. 140
2000 ..10.4 .. 12 .. 10 .. 1 .. 126
2200 .. 11.9 ..14 ..13 .. 1 .. 105
2400 .. 13.7 .. 16 .. 18.. 1 .. 88
2600 .. 19 .. 22 ..23 .. ..1 .. 95
 
1997 Bavaria 46 Exclusive
Volvo TMD22 79HP
260 liter tank
Cruising speed 7.5 kts at 2700 3 liters per hour.
86 hours and about 650 nms.

Nice surprise .... low consumption. :) (Accurate calculated average was 2.7 liters/hour based on 100 hours last summer ...all uses.):D:D
 
I also have a shipman 28.

I get between 1-2 litres/hr consumption depending on the conditions. I'm not sure what the tank capacity is as I've not owned her long enough to have time to check but she did 32hrs under power on her delivery trip back to Penzance last summer.
Enginge Beta BZ482 (13.5hp), 2 blade fixed prop (soon to be changed) 2300-2750 RPM. Normally use 2500 RPM for cruising.
I think you are lucky to have the extra HP, I don't think 13.5 is enough when the going gets tough. I thought 20-25 would be more useful.

EDIT, I should add that I put in another 12 litres off Lands End just to be safe but there was a fair amount left once we arrived.
 
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Rival 38,
Beta 37.5
Autoprop
6 knots at 1800 rpm 2l/hr
135l tank plus up to 250l in cans when long distance
360 up to 1000+

Longest motor to date around 350m to get out of the Azores High.
 
Dehler 39
Tank 110 L, 100 useable
2.5 l per hour @ 2,100 rpm = 6 kts flat water
240 miles range
Volvo D1-30, 3 bladed folder.
cr*p tankage for a boat like this. Always carry another 40 litrs when cruising
 
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Just a thought.....

28 hp, 25 ft lwl, 6.7 tons, 6 knots 2200 rpm, 2.5 litres/hour, 50 l tank.
I used to regard 100l as the minimum tank size for a 16-30 hp diesel. However, given the uncertainties about the stability, oxidation, water absorption and hydrolysis of vegetable-derived diesel fuel components, I am going to stick with the 50l tank and carry extra fuel in plastic 10 litre cans for longer trips.
 
Moody 54, 682 litres in a single tank, Yanmar 4Jh3HTE turbocharged inter cooled 4 cylinder.

6l/hr @ 2200 rpm and 7 knots
8l/hr @ 2600 rpm and 8.5 knots
12l/hr @ 3000 rpm and 9.5 knots

At economical cruise and 2200 rpm, range is about 100 hours and 700 miles, with 82 litres reserve for generating and heating.
 
Whats kinda interesting is that sail boats often get about 9mpg and fast light MOBOs get slightly less.
For example : Sailing boat: 3L/hr at 5knots gives about 9mpg
Planing speedboat: 15L/hr at 23knts gives about....8.5mpg

Am I right????? What is this talk about gas guzzlers??
 
SHUG said:
Whats kinda interesting is that sail boats often get about 9mpg and fast light MOBOs get slightly less.
For example : Sailing boat: 3L/hr at 5knots gives about 9mpg
Planing speedboat: 15L/hr at 23knts gives about....8.5mpg

Am I right????? What is this talk about gas guzzlers??
Click to expand...

Interesting. But are you comparing similar size boats?
By the way 3L/hr at 5 knots for a sailing boat sounds a bit too much. It sounds like a mismatch of engine vs boat size. 2l/hr probably sounds more reasonable (actually even this is slightly high).

Regarding speedboat consumption, I cannot comment. I don't have any experience with them.
 
Beneteau Oceanis 361
Volvo Penta MD2030D (with around 2000 hours on it), built in 2001.
Tank 75lt
Cruising at 2400-2500 rpm (max.3400) will consume around 2.5lt/hr giving speed around 6knots (depending on sea state of course; calm water, clean propeller will drive up to 6,3).
Range in theory is 30 hours maximum but I would never motor more than 20 hours without refilling.
 
Grand Banks 32

Reduced size of fuel tanks by 20 gallons a side.....

120 Hp Ford Lehman
160 Gallons
Cruise 7knts
Burn approx 1.75/hr at cruising 1600-1700revs
Approx 90hrs
Range approx 620ish

All depending on weather conditions it may be a little more or a little less :)

Tom
 
53ft, 27 ton, long keel ketch w/ Perkins 120 HP & AutoProp. 1640 litres of fuel.

In flattish conditions, clean bum etc

5 knots =5 litres per hour, but goes up to around 15 litres per hour @ 8 knots

Once motored for 5.5 days non stop (!!!) in mirror like flat calm coming back from the Azores.
 
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