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Moody 41,42,425

Mark Dixon

Mark Dixon
Temporary Member
#1
Of all the models that originated from the M41 molds, is there one or more that are considered more or less a "red headed stepchild" ? If so why?
 

Peter Wright

Peter Wright
Boat name
WILD THYME
Berth
Suffolk Yacht Harbour
Boat type
Moody 425
Cruising area
North Sea, English Channel, Biscay
#2
Hi Mark,

With your surname, I'd have thought you know all about these boats, but perhaps not all Dixons are related to each other.

Firstly, there was no Moody 42 coming from the M41 moulds - the series that developed from this design was M41, M419. M422 and M425, built over he period from 1984 to 1991. You can find details of these (and other Moodys) in the Moody Archive, accessed from a link towards the bottom of the left hand side of the home page.

Secondly, being partial to redheads, I'm not sure what you mean by a redheaded stepchild, but generally, issues with earlier models were designed out as the series developed, so the M425 represents the most developed version (but note that our boat is a M425, so I would say that!). The Moody 42 (circa 2000) was a development of the Moody 40 (circa 1990's), a later, rather different design, although sharing the qualities for which Bill Dixon is well known. The M425 was replaced in 1991 by the all new Moody 44

An example of this evolution is the standing rigging in the M41 which had 2 issues:
  • the shroud chainplates are bolted to part bulkheads below the deck. On the M41, one pair of chainplates do not line up fore and aft with the part bulkhead, so the chainplate is packed out from the bulkhead giving a less robust load path. On later models, revision of the layout below allowed these part bulkheads to be moved so that they align with the chainplate, eliminating that issue.
  • the M41 featured a baby stay, which was replaced in the later models by forward lower shrouds

The hulls of the latter 2 differed in having a sugar scoop stern added, creating space for a large lazarette which replaced the cockpit locker making more space below decks. None of them were lemons, if that's the meaning of your russet haired stepchild and, imho, the change from the M419 to the M422 was probably the largest of the three steps in development.

Hope this helps,

Peter.
 

Mark Dixon

Mark Dixon
Temporary Member
#3
Thanks and I like redheads too, just a turn of phrase. What would the issues of moving the chain plates to the outside of the hull on M41? And I would be pleased if I were related, I know my line comes from the Borders.
 

Peter Wright

Peter Wright
Boat name
WILD THYME
Berth
Suffolk Yacht Harbour
Boat type
Moody 425
Cruising area
North Sea, English Channel, Biscay
#4
Hi Mark,

You have misunderstood what I wrote about chainplates - they are not outside the hull on any of these models. On the M41, the chainplate is out of line with the part bulkhead to which it is secured in a fore and aft sense, so there is a need for packing between the chainplate and the part bulkhead. The issue here is that when a bolted joint, loaded in shear as this one is, includes a packing piece, you inevitably introduce a couple ( turning force) into the joint, which is almost zero without a packing piece. The change was to move the part bulkhead in later models so the two components line up and the chain plates all mount directly on their part bulkheads with no packing.

If you inspect any of these Moodys, you will see that the chainplates pass through the side decks with small stainless steel plates screwed downaround them to seal the penetration. Below decks, the chainplates and the part bulkheads to which they are secured are hidden behind the beautiful cabinetry so it's not easy to see them.

Peter.
 

Mark Dixon

Mark Dixon
Temporary Member
#5
I understood what you meant, but I was inquiring about the possibility if I were going to address the chainplate issue what about relocating and making new chainplates so that it would be on the outside of the hull thus not passing through the top of the side deck
 

Peter Wright

Peter Wright
Boat name
WILD THYME
Berth
Suffolk Yacht Harbour
Boat type
Moody 425
Cruising area
North Sea, English Channel, Biscay
#6
Mark,

That would require a complete rework of the rig design, as you would be widening the shroud base, which in turn would increase the headsail sheeting angle, so destroying the windward performance.

This is not really an appropriate discussion for this board - I cited the chainplate issue simply as an example of the development of the series from one model to the next. There are solutions to the chainplate and the babystay issue,
which do not require a new rig design which you can find by searching on the info Exchange board, which is also the appropriate place for technical discussions.

Peter.
 

Neil Eccles

Neil Eccles
General Committee
MOA Position
Website Editor
Boat name
CUTAWAY
Berth
Vannes
Boat type
Moody 42
Cruising area
West Coast of France and North Coast Of Spain
#8
Mark - what you suggest is a naval architect issue - as Peter says, outside this board and the MOA really. The only person who could answer your query would be Bill Dixon, your namesake and the designer.

Kindest

Neil
 

Robert Cardinal

Robert Cardinal
Boat name
MOODY MISTRESS
Berth
Vancouver
Boat type
Moody 425
Cruising area
Mediterranean
#10
The buyers perspective always comes into play when accessing the values of a used boat. The 419 while sharing certain features of the 422 and the later 425 carry a much lower price on average. The 422 and the later 425 seem to be in similar price ranges with the 425 possibly averaging a slightly higher price. R