Nelson Designs: A Noble Heritage.

[burgundyben]

Perkins HT6.354

Work of the devil!

 

[burgundyben]

stick to my Mitchell, but maybe re-engine

Why?

You have an M225ti - absolutely fabulous engine. Clean, quiet, frugal, simple, spares prices ok, capable of epic hours.

 

[Firefly625]

Why?

You have an M225ti - absolutely fabulous engine. Clean, quiet, frugal, simple, spares prices ok, capable of epic hours.

I know, I love it to.

Just another 100hp would be nice sometimes, the hull is so capable.

 

[burgundyben]

I know, I love it to.

Just another 100hp would be nice sometimes, the hull is so capable.

I wondered if you might say that. The M225ti is of course 204hp, the M300ti i think is 285hp, but its a tricky upgrade, you have to switch to the big inline pump and the cast ali case that the pump mounts to is different. Plus, there is 2 pumps, the excellent Bosch, or the rubbish Motorpal. I understand cooling to be marginal on the M300ti.

The M265's I put in Playtime we're fabulous. At 30 knots she was galloping along, then hammer down and she roared off!

If Latestarter was still posting, he'd tell you the answer is the Cummins B series, lots of things make that a very simple re-power, but.....the Cummins is mechanically noticeably more noisy and the marine specific Cummins parts are comedy bad pricing.

 

[rustybarge]

I wondered if you might say that. The M225ti is of course 204hp, the M300ti i think is 285hp, but its a tricky upgrade, you have to switch to the big inline pump and the cast ali case that the pump mounts to is different. Plus, there is 2 pumps, the excellent Bosch, or the rubbish Motorpal. I understand cooling to be marginal on the M300ti.

The M265's I put in Playtime we're fabulous. At 30 knots she was galloping along, then hammer down and she roared off!

If Latestarter was still posting, he'd tell you the answer is the Cummins B series, lots of things make that a very simple re-power, but.....the Cummins is mechanically noticeably more noisy and the marine specific Cummins parts are comedy bad pricing.

Here's a doer-upper with the M300 engines.

http://www.yachtworld.com/boats/1974/Nelson-40-2968924/Cork/Ireland#.WfsOlNynyBY

I didn't realise the cabins and wheelhouse was so narrow on the 40' hull.

 

[rustybarge]

Comparing the standard Nelson 40' hull and the modified Aquastar 38'

....and the Aquastar moulded in 'trim tabs' on their widened 12'9" beam hull which has been shortened to 38'

 

[Firefly625]

Comparing the standard Nelson 40' hull and the modified Aquastar 38'

Always liked Soundtrack, but lack of guard rails kinda put me off going to have a look, has twin 300 perkins sabres

 

[rustybarge]

Always liked Soundtrack, but lack of guard rails kinda put me off going to have a look, has twin 300 perkins sabres

I believe those superstructure mounted inside rails are called Hadrian rails (?)

 

[rustybarge]

Looking at an old magazine article in MBY May 2013 on the Aquastar 38' hull:

'Flat out this hull will reach 26 knots though he rarely takes it above 22knots. Any faster and the boat starts to plane on one side of the keel producing an unsettled rude. As a result Andrew sticks to 22 knots for fast cruising in most sea states and knocks it back to 18 knots when cruising with economy in mind.'

So it appears that their modified hull has altered the high speed stability.

 

[rustybarge]

Hotaria currently ashore on Hayling Island, John (owner) has engines out and hull is having the hull epoxied and painted, plus some other stuff.

The engines are the original v8 cats, 400hp, 48 valve I think, cranks are a 3 man lift, they are massive.

Expected back in commission next year.

Just wondering if you happen to come into contact with John could you please ask if he could give us some of his insights into the Nelson 40'; perhaps he has some photos of the rebuild etc

 

[rustybarge]

The smaller Halmatic Weymouth 34' has the same wide beam as its bigger cousin the Nelson 40'; might be just big enough for a couple to go cruising in.

Seems to weigh in at 8 tons Vs 9 tons for the 40'

http://poole.boatshed.com/halmatic_weymouth_34-boat-46452.html

 

[rustybarge]

Just to clarify the connection between Halmatic Weymouth and Nelson:

Halmatic eventually bought James and Caddy and used the Weymouth name to market a complete range of semi displacement vessels, which they supplied fully or partially fitted, as well as just hulls/superstructures. They also continued to sell Nelson badged boats.
This new Halmatic / Weymouth range included the Weymouth 34, which was a redevelopment of the Weymouth 32, with a completely new GRP superstructure again from the board of John Askham.

Remember also at this time, Tylers had the mould tools for the Nelson 34, so Halmatic needed a successful 34 foot semi displacement boat in their Weymouth range to compete. Later they produced the Nelson 35 (designed by Arthur Mursell), but it was never marketed as a Weymouth.Other boats in the Halmatic Weymouth range included the Weymouth 42, which used a standard Nelson 40 hull plus a bathing platform and a super new GRP superstructure with inclusive aft cabin. This classic Nelson design has often been referred to as the 'Gentleman’s Motor Yacht'.

 

[Firefly625]

was the Humber 34 same 34 hull?

Edited bit;

actually John Askham design

later version

 

[rustybarge]

was the Humber 34 same 34 hull?

Edited bit;

actually John Askham design

later version

Seems to be the 9' narrow beam Nelson 34'

http://www.yachtworld.com/boats/1978/Humber-34-3069560/Guernsey#.WftfV9ynyBY

 

[rustybarge]

Oh dear, this one is 12'

http://www.ancasta.com/boats-for-sale/humber-34-21816/

 

[rustybarge]

Oh dear, this one is 12'

http://www.ancasta.com/boats-for-sale/humber-34-21816/

According to the Nelson owners club Humber fitted out Halmatic Weymouth 34' hulls, so probably 11' beam.

Talk about confusing ......��

 

[rustybarge]

To summarise the available lightweight wide beam Nelson derived hulls by name:

Nelson mk1 40' x 11' made by Halmatic & several others.
Weymouth 42'x11' actually 40' plus swim platform by Halmatic.
Weymouth 32/34' x 11' by Halmatic also supplied to Humber et al.
Nelson 35'x 11' actually a Weymouth 34 streched to 35.(post #16)
Aquastar 38'x 12'9" hard chine knuckle with moulded in trim tabs.

 

[Flynnbarr]

was the Humber 34 same 34 hull?

Edited bit;

actually John Askham design

later version

1st pic is a Humber 34,second pic is a mk11 Humber 35......just to confuse even more

 

[rustybarge]

1st pic is a Humber 34,second pic is a mk11 Humber 35......just to confuse even more

Noooooo...........! :ambivalence: lol.

 

[rustybarge]

Duplicate.