Nelson Designs: A Noble Heritage.

[rustybarge]

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

That's very interesting; it's amazing how complex hull design is and how many compromises the naval architect has to make to get the boat to perform. The Nelson hull form was discovered by sheer luck according to the original designer, which shows its maybe more of an art than a science.

Perhaps the Nelson is an iconic boat design just like the Ford Escort mk2 is in the 2wd rally car world.

 

[rustybarge]

This Nelson 35 was for sale last year in NI; could make a good candidate for a fantastic rebuild.

https://www.findafishingboat.com/nelson-35/ad-75943

 

[burgundyben]

Just to add, one of my boating dreams is to take a Nelson 40 to St Kilda.

 

[rustybarge]

Just to add, one of my boating dreams is to take a Nelson 40 to St Kilda.

I've always wanted to do loch Ness and the Western Isles. I often watch programmes on the Scottish islands on the telly, it looks like a fantastic summer cruise area; the only hitch are the biting mozzies.

I think the Nelson is a good all round performer which would make a perfect choice to go exploring, and indeed make sea passages if you had big enough tanks.

 

[burgundyben]

I've always wanted to do loch Ness and the Western Isles. I often watch programmes on the Scottish islands on the telly, it looks like a fantastic summer cruise area; the only hitch are the biting mozzies.

I think the Nelson is a good all round performer which would make a perfect choice to go exploring, and indeed make sea passages if you had big enough tanks.

At displacement speeds surely they would have quite a range.

From Solent, along the West Country, across to see my school friend in Baltimore, double back up the irish sea, stopping off at Isle of Man. Up to Butt of Lewis, out to St Kilda, Crinan canal, head back north to Fort William, through the Caledonian Canal, Orknies and Shetlands. Across to Bergen.....I could go on.

 

[Firefly625]

At displacement speeds surely they would have quite a range.

From Solent, along the West Country, across to see my school friend in Baltimore, double back up the irish sea, stopping off at Isle of Man. Up to Butt of Lewis, out to St Kilda, Crinan canal, head back north to Fort William, through the Caledonian Canal, Orknies and Shetlands. Across to Bergen.....I could go on.

My Mitchell has been round the UK although not over the top but through Caledonian, visited Ireland and IOM on the way..and down the other side... semi displacement 10 knots, 16LPH fuel consumption and a 500 litre tank an excellent small passage maker

 

[burgundyben]

My Mitchell has been round the UK although not over the top but through Caledonian, visited Ireland and IOM on the way..and down the other side... semi displacement 10 knots, 16LPH fuel consumption and a 500 litre tank an excellent small passage maker

I would be interested to know what the consumption is as 6 or 7 knots?

 

[Firefly625]

I would be interested to know what the consumption is as 6 or 7 knots?

Last owners took her to Paris, they reckoned at 6 knots she was using 4-5 litres an hour. They thought fuel gauge had actually stopped working as from le Havre to Paris the fuel gauge didn't move so resorted to dipping the tank and found it was still full. She would be a good boat to do the canals in, she tracks straight with no helm input and wash at those speeds pretty minimal...

 

[Alicatt]

I just love the period hi-tech equipment!

Is that a radio-phone or a depth-sounder?

Hello Sailor I used to install these for a living, long time ago when I was a young apprentice working for Decca Radar up in Scrabster. It was the first training course went on at Decca's Head office in Croydon, installing, servicing and repairing Sailor MF and VHF radio telephones for what was the fishing fleet of the day.

 

[rustybarge]

Hello Sailor I used to install these for a living, long time ago when I was a young apprentice working for Decca Radar up in Scrabster. It was the first training course went on at Decca's Head office in Croydon, installing, servicing and repairing Sailor MF and VHF radio telephones for what was the fishing fleet of the day.

Thanks for the info; its interesting that the vhf radio is still basically the same way of communicating after all these years.

 

[rustybarge]

The Nelson family of designs still lives on For those with deep pockets. Cocwells will custom build you a wooden cedar strip plank Nelson 40.

http://cockwells.co.uk/sail-and-motor-yachts/design-concepts/classic-nelson-40/

Type: Classic Nelson 40

Designer: TT Boat Designs Ltd

As a custom boatbuilder, we are equally happy to utilise the expertise of our in-house design team or work with a designer of your choosing. Our Classic Nelson 40 is a great example of how Cockwells collaborates with a renowned firm to produce a tailor-made vessel.

Developed from an Arthur Mursell design, we have handcrafted the bespoke interior of this high-end cruising boat from the finest materials to the client’s specific brief.

Constructed from strip-planked cedar, the hull is sheathed with glass fibre, impregnated with epoxy resin and externally finished with a two-part paint system.

With a solid teak deckhouse and toughened glass windows, the deck is constructed from fully-swept teak with a sub-layer of 12mm marine ply sheathed in epoxy to increase structural integrity.

A fore cabin with two berths offers generous storage space; an on-board water system feeds the electric toilet, shower and hand basin; a fully-equipped galley includes a dinette that converts into a double berth; and the airy saloon provides seating for six or an additional sleeping area to provide six berths in total.

Driven by twin screws powered by diesel Volvo D4 225hp marine engines, this vessel can reach a maximum speed of 24 knots and a cruising speed of 16 knots.

 

[rustybarge]

Moving down in size Orkney boats started manufacturing TT nelson boat designs from 1990 onwards.

.TT Boat designs and Orkney form new partnership

The newly formed collaboration between Orkney and naval architect Arthur Mursell of TT boat designs was formed in the early 1990's which bought Orkney designs into the 21st century. An extremely successful partnership which continues to this day. TT Boat designs is renowned for many of the Nelson designs that you see, often used as Pilot craft, work boats and launches around the world.

 

[rustybarge]

Orkney Sea Angler 21 & 23 first released in 1991.

The Day Angler 21 & 23 were created for use by commercial beach boat fishermen who found the Fastliner 19 a little too small. Although originally intended as an open workboat it was soon adapted to allow for a wheelhouse, proving popular with operators such as HM Coastguard and Harbour Authorities and the German Police Service. Orkney still produce the open boat version of the 21 for commercial operators.

 

[rustybarge]

The Orkadian 23 was manufactured from 1995 onwards.

. The Orkadian 20 & 23 were for the customer who wished to go boating in more luxury and was offered with a more refined fit out and finish. That said, HM Coastguard ordered 2 Orkadian 23's as patrol boats which remained in service for over 10 years in Scotland and on the South Coast. This models popularity even extended as far as the Falkland Islands

 

[rustybarge]

To my mind the prettiest of the Orkneys is the pilot 20 from 1998 onwards.

. The new Pilothouse

1998 and 2002 saw the launch of the Pilothouse 24 and her smaller sister the Pilothouse 20, developed from the Day Angler 19+. Both models were a great success with recreational anglers and day boaters alike.

PILOTHOUSE 20

Beam 7'10" 2.4m
Hull Weight 2030 lbs 925 kg
Max HP
Maximum 80hp Long shaft outboard
130hp Inboard Diesel Sterndrive option available
Design Speed
Max design speed 23 knots / Optimum design speed 15 Knots
Performance Indicator
30 hp 12 knots
60 hp 18 knots
80 hp 23 knots