What range do you have?

[burgundyben]

I was looking at a boat for sale, the first leg of a delivery to my home port would be about 170nm. At true displacement speed, it would have the range, but would take foreeeeever. I'd do it at about 10 knots, its not a planing boat, but at that speed, I reckon the fuel range is marginal


What range do you have at displacement speed and at your usual cruising speed?

 

[tillergirl]

360nm @ 7.5 kts cruise - perhaps 230nm @ 9/10 kts (optimistic) (and clean bottom & prop)

 

[BruceK]

range? Between 12 to 14 hours giving it welly. How far I get in 14 hours depends on sea state

Edit (I can rev the engines to 3k rpm but that can be anything between 14 and 20 knts in lumpy water. After 3k rpm the boat is always doing 22knts+)

 

[sailorman]

360nm @ 7.5 kts cruise - perhaps 230nm @ 9/10 kts (optimistic) (and clean bottom & prop)

me about 300mls @ 7 kts

Im surprised Tillergirl can attain 10kts & cruise @ 7.5

 

[vas]

approx:

1200nm @ 5.5kn (if you can stand it that is )
1000nm @ 6.5kn
700nm+ @ 7.5kn (that's what I mostly use as I'm never in a hurry)
200nm @ 20kn

[with 1200lt tanks]

V.

 

[julians]

About 250 nm at 25 knots with another 50nm of emergency range, so 300nm from full to totally empty

 

[rafiki_]

Safely 200Nm at 22kn, lots at 8kn. 1000litres

 

[Hot Property]

30 litres an hour at 19 knots so around 120 nm on a tank......

210 litres (but it is petrol!).

33 knots at 88 litres an hour if money no object and refuelling point available.

Come to think of it provision of petrol even on the Solent is pretty poor so diesel outboards are the way to go.

 

[Scarron]

I reckon I could do your 170nm home at 40knots with a 10% reserve [100 gallons of Super unleaded]

No idea about displacement speed - wots that?

 

[QBhoy]

100 miles range cruising at 25mph gps @2200 rpm and about 19 litres per hour. Figure about a litre used per mile to be safe and holding back 10% reserve from 110 litre tank. Not bad for a big 300+hp V8 ? who said petrol aren’t efficient, haha. The new common rail MPI and GXI are amazing things.

 

[[2068]]

About 160nm with a 20% reserve at 20kts.
600l tanks, 60l/hr at 20kts.
No idea about displacement speeds.

 

[Whippersnapper]

200NM with a 20% reserve at 18-30 knots. Forever at Hull speed (at least it would feel like forever)

 

[longjohnsilver]

About 2000 nm @ 7kts

 

[NBs]

2300 nm / 6,2kts
1650 nm / 7,4kts
1050 nm / 8,1kts
350 nm/ 15kts

+ about with 150 nm/ 7kn reserve

 

[simonfraser]

200 @ 22 kts - depending on the sea state

but would not do a trip like that in a boat new to me, whatever the seller / surveyor says ....
do some sea trials first

 

[Irish Rover]

Around 2,000 miles @ 7MPH with 20% reserve

 

[burgundyben]

I wish I had asked what boat it was too!

Scarron - I don't believe you.

 

[julians]

To expand on my figures above:

235 nm at 42 knots from full to dry.
481 nm at 6knots

The boat has a 300 litre tank .

 

[Irish Rover]

I wish I had asked what boat it was too!

Scarron - I don't believe you.

If it was me you called out you would have been 100% correct to do so. I miscalculated in my mental arithmetic and I may well need to reconsider the advisability of relying on my few remaining brain cells especially when quoting prices to potential customers. My boat is a FP Greenland 34 powercat with 2 x 74HP Yanmars. Outside the marina I only ever use one engine and I generally motor @ 2,200 rpm averaging 7 mph and burning under 3.5LPH. The combined capacity of my 2 tanks is 760L x 80% @3.5 LPH = 173 hours x 7MPH =1,216 miles. Mea cupla and sorry.

 

[longjohnsilver]

If it was me you called out you would have been 100% correct to do so. I miscalculated in my mental arithmetic and I may well need to reconsider the advisability of relying on my few remaining brain cells especially when quoting prices to potential customers. My boat is a FP Greenland 34 powercat with 2 x 74HP Yanmars. Outside the marina I only ever use one engine and I generally motor @ 2,200 rpm averaging 7 mph and burning under 3.5LPH. The combined capacity of my 2 tanks is 760L x 80% @3.5 LPH = 173 hours x 7MPH =1,216 miles. Mea cupla and sorry.

Still impressive!