sailing yacht to floating motorhome?

[Elessar]

Thanks Bruce. I am marina based but who wants to stay in the base all the time. Trouble with the B C is that there are only 2 decent marinas between Cardiff and Lands end - Swansea and Portishead. True there is a silted up one at Watchet and a tiny one I have yet to visit at Porthcawl plus there is Milford haven. But there are lots of nice little drying harbours thast I visited when I had a cat and a bilgie and would like to visit again.
Your comment is interesting though. How bad are growths on a mobo? On my yacht, the weed I get on coppercoat takes maybe half a knot off the speed. Is it much more serious on a mobo?

Yes. But most of the problem is the sterngear.
Tilt it up and keep it scrubbed clean.
A dirty bum And stern gear can take a 1/3 of your top speed easily and so maintaining a steady speed involves pushing the throttles further forward costing £££

I hope Scala sees this thread he’s recently gone sail to power.

 

[Birdseye]

do you really mean a third eg from 20kn down to 13 for the same power? And is that with crustaceans or just lime / weed, because I find that all I ever get on coppercoat is a light slime.

 

[gordmac]

Does the slime wash off at speed?

 

[Elessar]

do you really mean a third eg from 20kn down to 13 for the same power? And is that with crustaceans or just lime / weed, because I find that all I ever get on coppercoat is a light slime.

Yes. If it’s really bad you won’t get on the plane at all.
But it’s more the stern gear than the hull.
Just 1 or 2 barnies on the props makes a difference.

 

[Elessar]

Does the slime wash off at speed?

Not noticeably. At the speeds I can go anyway.

 

[oldgit]

Hi Birdseye and welcome to the forum.
Do not take too much notice about the grumpies, a small minority of motorboat "drivers" appear to have have a serious inferiority complex with regards to yachties, basically anybody with the cash can buy motorboat and provided they can turn it on and get out of the marina , go boating.
A higher level of skill is required to get sail boat to go anywhere a yachty by necessity needs to put some thought into a journey, the stinkpotter can simply use power to achieve his aims.

As for drying out. Any boat afloat 24 hours a day allows the beasties all the the time they want to set up home ,
From experience ,drying out reduces the fouling considerably, especially on East coast mud, sitting on the mud appears to starve growth of light and oxygen.
Went from a drying mud berth to an all tide pontoon berth, the amount and type of growth increased considerably , no matter wether a hard or soft anti- foul.
Do not go down the outdrive route.
One suggestion.
Compared to yachts , you may might find one or two of the suggested lightly built smaller boats feeling a bit tippy and unstable,clamber aboard one and see if it stops wobbling to your satisfaction, not talking about the Nimbus,Mitchell,Kent et al.

 

[Elessar]

Hi Birdseye and welcome to the forum.
Do not take too much notice about the grumpies, a small minority of motorboat "drivers" appear to have have a serious inferiority complex with regards to yachties, basically anybody with the cash can buy motorboat and provided they can turn it on and get out of the marina , go boating.
A higher level of skill is required to get sail boat to go anywhere a yachty by necessity needs to put some thought into a journey, the stinkpotter can simply use power to achieve his aims.

As for drying out. Any boat afloat 24 hours a day allows the beasties all the the time they want to set up home ,
From experience ,drying out reduces the fouling considerably, especially on East coast mud, sitting on the mud appears to starve growth of light and oxygen.
Went from a drying mud berth to an all tide pontoon berth, the amount and type of growth increased considerably , no matter wether a hard or soft anti- foul.
Do not go down the outdrive route.
One suggestion.
Compared to yachts , you may might find one or two of the suggested lightly built smaller boats feeling a bit tippy and unstable,clamber aboard one and see if it stops wobbling to your satisfaction, not talking about the Nimbus,Mitchell,Kent et al.

How do you suggest he dries on sand if he doesn’t take the outdrive route?

 

[oldgit]

How do you suggest he dries on sand if he doesn’t take the outdrive route?

Go to any drying harbour and look at what the locals use . Many shaft drive peche promanade type boats have a keel and the prop is protected, possibly because many French harbours dry on sand . ?

The only legs that Birdseye really needs ?


Worth a read.
Hardy Motor Boats – Quality, Comfort, Strength and Excellent Sea-Keeping

 

[Elessar]

Go to any drying harbour and look at what the locals use . Many shaft drive peche promanade type boats have a keel and the prop is protected, possibly because many French harbours dry on sand . ?

The only legs that Birdseye really needs ?


Worth a read.
Hardy Motor Boats – Quality, Comfort, Strength and Excellent Sea-Keeping

He wants to plane and dry for c£50k.
So you haven’t solved the problem that outdrives solve.

 

[oldgit]

He wants to plane and dry for c£50k.
So you haven’t solved the problem that outdrives solve.

The Hardy 32 in the pix with big engines will give 25 knots, bit above the quoted price bracket tho !


One of these will certainly be change of direction for Birdseye

 

[Birdseye]

this is all beginning to sound a lot less straightforward than a raggie!

 

[oldgit]

We have several ex raggies in our club, all have gone down the heavy displacement route, an older Broom of some sort seems to be the default choice, but any of those older Brooms boasting a protective keel will probably struggle to cruise at 12 -15 knots.
Many boats no longer boast a keel in the constant quest for speed and the builder assumes their boats will only ever be berthed in marina.
Early Princess boats came with the option of keel.
This Broom hull was frequently dried out on concrete slips and hards for prop swops and anti fouling.

 

[Elessar]

We have several ex raggies in our club, all have gone down the heavy displacement route, an older Broom of some sort seems to be the default choice, but any of those older Brooms boasting a protective keel will probably struggle to cruise at 12 -15 knots.
Many boats no longer boast a keel in the constant quest for speed and the builder assumes their boats will only ever be berthed in marina.
Early Princess boats came with the option of keel.
This Broom hull was frequently dried out on concrete slips and hards for prop swops and anti fouling.

The OP will be doing 90 mile trips. I’m sure he’d be interested to know how many litres of diesel a boat like that would use at 15 knots.
Would it be double or treble a 28 fit outdrive boat do you think?

 

[oldgit]

The OP will be doing 90 mile trips. I’m sure he’d be interested to know how many litres of diesel a boat like that would use at 15 knots.
Would it be double or treble a 28 fit outdrive boat do you think?

Detailed log with fuel consumption of that particular boat over 6 years of ownership and around 1000 hours run time.
Boating ranged from non tidal cruising on the Thames and Medway, off shore trips around the coast plus a nip across Le Manche.
Boat was usually well loaded with family, friends and provisions especially fuel as club prices made it daft to fuel elsewhere.
On average the fuel burn for twin 135HP engines on shafts was 25L per hour over period of ownership.
The previous boat was Princess 33 with 130 HP engines on outdrives ,the fuel consumption over 7-8 years( and similar hours ) was not noticably less.
Not sure how much fuel a 28ft outdrive boat would use with full water, full fuel tanks and full crew on board wanting to go away for more than day trip would use. ?
Best estimate from a Boatshed Ad.
90 miles in the 37 ft Broom 200 litres
90 miles in the 28ft Sealine 150 litres.

Engine	2 x Diesel 170hp
Prop(s)	Duo Prop
Fuel consumption (approx)	50.0 ltr (11.0 G) /hour At Cruising Speed

 

[Elessar]

Detailed log with fuel consumption of that particular boat over 6 years of ownership and around 1000 hours run time.
Boating ranged from non tidal cruising on the Thames and Medway, off shore trips around the coast plus a nip across Le Manche.
Boat was usually well loaded with family, friends and provisions especially fuel as club prices made it daft to fuel elsewhere.
On average the fuel burn for twin 135HP engines on shafts was 25L per hour over period of ownership.
The previous boat was Princess 33 with 130 HP engines on outdrives ,the fuel consumption over 7-8 years( and similar hours ) was not noticably less.
Not sure how much fuel a 28ft outdrive boat would use with full water, full fuel tanks and full crew on board wanting to go away for more than day trip would use. ?
Best estimate from a Boatshed Ad.
90 miles in the 37 ft Broom 200 litres
90 miles in the 28ft Sealine 150 litres.

Engine	2 x Diesel 170hp
Prop(s)	Duo Prop
Fuel consumption (approx)	50.0 ltr (11.0 G) /hour At Cruising Speed

Ok. If a 37ft shaft driven broom can do 90 miles at P speed for 200 litres that then fair play.

My out drive Sealine 37 would have used about 350 for that distance at P speed.

Seems like magic to me.

Or could it be that your fuel consumption figures are mostly as D speed as it was so noisy and thirsty you hardly ever got on the plane?