Nelson Designs: A Noble Heritage.

Wow! It. Looks like a Nelson on steriods that's been stretched.....

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IIRC, was advertised @ Eu 2,200,000 three or four years ago.

ATB,


John G
 
IIRC, was advertised @ Eu 2,200,000 three or four years ago.

ATB,


John G

Its a big dilemma for secondhand superyachts as well-off people who could afford €2m will probably commission a new boat, and even at a cheap knock down price ordinary mortals could not afford the ruinous running costs: stuck between a rock & a hard place.
 
According to the Nelson owners club Humber fitted out Halmatic Weymouth 34' hulls, so probably 11' beam.

Talk about confusing ......��

Humber were Halmatic hulls designed by John Askham and fitted out by Fred Booker Marine of Barnsley,a builder by trade.In the shadows of a South Yorkshire coal mine he turned out hand crafted teak interior boats.Oh and I think the Humbers are a positively fat 12' 9"......!
Not confusing at all Rusty....:)
 
Humber were Halmatic hulls designed by John Askham and fitted out by Fred Booker Marine of Barnsley,a builder by trade.In the shadows of a South Yorkshire coal mine he turned out hand crafted teak interior boats.Oh and I think the Humbers are a positively fat 12' 9"......!
Not confusing at all Rusty....:)

Thanks. At last someone who knows what they are talking about. :)
 
Halmatic Built the Halmatic 34 which was designed by John Askham (ex of Keith Nelson or TT Boat Design) Humber fitted out the hulls and Halmatic did their own called the Weymouth 34, What is now Boatworks in Guernsey then Hainsworth Marine fitted out one and One was fitted Out by Seaward in Guernsey called Brigand which I bought with a pair of 180 Mercruiser diesels which ate them selves and i fitted a pair of Sabre 265hp.

The Halmatic 34 is a lovelly hull, I always felt safe in her but the family outgrew her.

The Halmatic 34 was also used for work boats and pilot boats. It was wider than the similar length Nelsons of its day.
 
Halmatic Built the Halmatic 34 which was designed by John Askham (ex of Keith Nelson or TT Boat Design) Humber fitted out the hulls and Halmatic did their own called the Weymouth 34, What is now Boatworks in Guernsey then Hainsworth Marine fitted out one and One was fitted Out by Seaward in Guernsey called Brigand which I bought with a pair of 180 Mercruiser diesels which ate them selves and i fitted a pair of Sabre 265hp.

The Halmatic 34 is a lovelly hull, I always felt safe in her but the family outgrew her.

The Halmatic 34 was also used for work boats and pilot boats. It was wider than the similar length Nelsons of its day.

That's my feeling too, the 34 looks a bit on the small side even with the wider 11' beam, and it weighs only a 1 ton less than the big 40'; my only reservation is the round hull which must roll in a beam sea even at semi-d speeds.

I like the look of the Aquastar with its hard chine knuckle running the full length of the hull, it must help give the hull dynamic stability at slower speeds even if its a bit unstable over 22 kts. It's also light for a 38' at approx 9 tons.

Did you find the 34' stabilised itself once you went faster than displacement speeds?
 
The Halmatic 34 gave an excellent ride and did not roll much above 12 knots.

I now have an Aquastar 48 ( without fins) and compared with the nelson 42 she is less prone to rolling and cork screwing with a following sea than the Nelson.

My Aquastar 48 will roll at rest and at slow speeds but the faster you go the stiffer and less prone to roll she gets.
 
The Halmatic 34 gave an excellent ride and did not roll much above 12 knots.

I now have an Aquastar 48 ( without fins) and compared with the nelson 42 she is less prone to rolling and cork screwing with a following sea than the Nelson.

My Aquastar 48 will roll at rest and at slow speeds but the faster you go the stiffer and less prone to roll she gets.

Its good news to know that the Nelson hull lives up to its iconic reputation, but its a round bilge boat so roll is a built in drawback that can't be overcome without stabs of some sort.

I can see why Aquastar modified the hull with hard chines to give it more roll resistance at slower speeds; the hull seems to have gained more lift as well because owners report 25kts with twin 265hp volvos Vs 20kts for the Nelson 40' with twin 300hp.

Anyhow there appears to be hundreds of old Nelson 40's for potential rebuild at very cheap prices, but fewer Aquastar 38's more in the £60-70k range which make them uneconomic to re-engine.
 
Its good news to know that the Nelson hull lives up to its iconic reputation, but its a round bilge boat so roll is a built in drawback that can't be overcome without stabs of some sort.

I can see why Aquastar modified the hull with hard chines to give it more roll resistance at slower speeds; the hull seems to have gained more lift as well because owners report 25kts with twin 265hp volvos Vs 20kts for the Nelson 40' with twin 300hp.

Anyhow there appears to be hundreds of old Nelson 40's for potential rebuild at very cheap prices, but fewer Aquastar 38's more in the £60-70k range which make them uneconomic to re-engine.

nothing wrong with round bilges and a bit of rock n roll!

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and where are all the planning hulled boats?
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nothing wrong with round bilges and a bit of rock n roll!

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and where are all the planning hulled boats?
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Aha, I think I can see St.Tropez in the distance ... Lol.

Luckily I've never got sick on a small boat , but I've had some very bad experiences on large ferries in rough weather. My worst was being stuck on the Holyhead Dublin ferry for 18 hrs in storm force winds because it was to rough to enter the harbour.
 
I've just remembered what the modified knuckle on the Aquastar hull is called : the Americans call it a 'Planing chine.' It means you can keep a deep vee hull, which is bad at getting up on the plane, by putting a flat chine around the hull just below the waterline: the best of both worlds.
 
Aha, I think I can see St.Tropez in the distance ... Lol.

Luckily I've never got sick on a small boat , but I've had some very bad experiences on large ferries in rough weather. My worst was being stuck on the Holyhead Dublin ferry for 18 hrs in storm force winds because it was to rough to enter the harbour.

Same for me, fine on small boats, ferries in rough weather I would also be ok on if it wasn't for the sound of other people throwing up and the subsequent smell of vomit...
 
This Trinity lighthouse version of the Nelson 40 has rear facing doors from the pilot house out onto the sidedecks, with a narrow companionway stairs down to the aft cabin: a very clever way of stopping green water flooding the wheelhouse.

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Looking aft inside wheelhouse , door on the left to deck, and steps down to aft cabin on right.
 
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Its for sale; I'm nearly tempted as it has twin Cummins engines, but the accommodation is very small with a tiny aft cabin and an equally small forward cabin space.

A very pretty design, it looks like it could cope with storm force conditions.
 
I've just remembered what the modified knuckle on the Aquastar hull is called : the Americans call it a 'Planing chine.' It means you can keep a deep vee hull, which is bad at getting up on the plane, by putting a flat chine around the hull just below the waterline: the best of both worlds.

Yup your “ planing chine “ is sometimes called a lifting strip .
It helps add lift back in from lost flatness in deep V.s .
Here it’s 23 degrees .
There are down sides .I think it’s easy to think of two kids on a see saw , when ones high up in the air t,other is down , they both can,t be up together .
The downer s are you need more Hp bigger engines ,with associated fuel burn .
They can generate noise as the flat bits slap / clap down on the water .
How ever a you infer they stiffen up the ride roll wise , boats L and R attitude stays flat when running ,
The faster the stiffer roll wise the ride .
Also observationally @ anchor it seems to roll less compare neighbours ,when the wash of another comes by .

I like Nelsons the concept btw , and this thread .

These Itamas occupy a different niche segment of the smooth ride , a different approach of the same problem , which is getting a smooth ride in rough seas ,for a different market the Med .

Amarti went down the deep V route inspired by Soni Levi designs .

https://imgur.com/gallery/pnJvW
 
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