"Dreamboat" design

[gunship]

But first a disclamer: My sailing experience is limited to inshores only. I have always been drawing boats, since my grandpah is a retired NA - thou he only did large ships á la Thor Britannia and such. So this boat was thought as a comfortable "apartament on water", while still being a a good motor- and sailing vessel. Of course a compromise. Please ovbsever: this is just fantasy - nothing will be tried to build the thing.

12m LOA (hull only, not bowspirit or davits)
4m Wide
1,7m Draft
Displacement 19 Tons fully loaded.
about 130m^2 Sail.
LWL: 10,9m
Width WL: 3,8m
6 berths
100hp engine? i dont know.

2 masted Schooner gaff rig.


And so, a few questions.

The aft cabin has six rather large windows, that are closable with something like gunports. Would that work on an ocean, or is it just in vain?

Also, Is she looking a little to fat or wont it matter?

I hope the scans are "readable" otherwise, I'll have to re-draw them in ink...

Anything else appreciated.

[TeddyDiver]

A couple of remarks for starters.. What the SOR for this.. Don't put any tankage in the ends of the hull.. Ketch rig might be better with a hull of this kind and size IMHO
BR Teddy

ps. Du har inte sursild i skåpe och Gimbaled table

[gunship]

SOR? and the tanks.. in case of hitting something?

Hmm Ketch rig. Would get the mainsail in a better position?

[TeddyDiver]

SOR, Statement of requirements, ie what's the purpose of the boat
Tanks. You wan't to keep the ends light..
Ketch. That too for running, easier when shorthanded..

[gunship]

Ah, the SOR are (with a little beginner Naivity)

Comfortable.
Good sailboat.
Decent Motor boat - steerable from inside pilothouse.

Not too much draft, for inshore. (Not prioritised anymore)
Ocean capable.
Steel hull, or just strong enough to survive ice.

EDIT: one more. preferably not longer than 12m, for swedish regulation purposes.

Originally Posted by gunship

Ah, the SOR are (with a little beginner Naivity)

Comfortable.
Good sailboat.
Decent Motor boat - steerable from inside pilothouse.

Not too much draft, for inshore. 1
Ocean capable.2
Steel hull, or just strong enough to survive ice.

EDIT: one more. preferably not longer than 12m, for swedish regulation purposes.

Give up 1 or 2

And I don´t call that fat, it is still within the common proportions. Given the width is meant over all, and not WL.

Regards
Richard

[gunship]

I was almost sure those two wouldn't work

[PAR]

Gunship, given your current skills, do yourself a big favor and purchase a set of plans. Atkins "Rough Weather" would be a good starting point as would "Vega". Both are motor sailing hulls and fairly efficient. Yours is a 14 - 15 meter boat stuffed into a 12 meter length. It'll work, but it will also suck fuel through a 100 mm hose. With a real set of plans in hand, you can make changes, like moving the rudder inboard or changing the accommodations, etc., but the hull form will not let you down.

[gunship]

Originally Posted by PAR

Gunship, given your current skills, do yourself a big favor and purchase a set of plans. Atkins "Rough Weather" would be a good starting point as would "Vega". Both are motor sailing hulls and fairly efficient. Yours is a 14 - 15 meter boat stuffed into a 12 meter length. It'll work, but it will also suck fuel through a 100 mm hose. With a real set of plans in hand, you can make changes, like moving the rudder inboard or changing the accommodations, etc., but the hull form will not let you down.

Indeed, I thought so. I've been thinking of making it longer, since all the compromises were due to not enough length. Purchasing something real is probably more than I'm willing to spend on this little project - I'd rather spend that money on a book.

[PAR]

Purchase real plans, not a yacht. Your engineering skills are questionable, particularly in this class yacht. I mean no offense, but you questions suggest a considerable lack of understanding. Most stock plans are inexpensive and you can upgrade the styling and accommodations, knowing full well the design will preform as expected and not flop over on it's side come launch day.

[michael pierzga]

All great designs start off as a sketch, then mature. Your project resembles the Rhodes designed Abeking & Rasmussen built DOLPHIN I recently saw being refit....have a peek

http://www.palmawatch.com/project_do...ts_dolphin.htm

http://www.palmawatch.com/bilder/dol...e_exklusiv.pdf

[gunship]

Originally Posted by PAR

Purchase real plans, not a yacht. Your engineering skills are questionable, particularly in this class yacht. I mean no offense, but you questions suggest a considerable lack of understanding. Most stock plans are inexpensive and you can upgrade the styling and accommodations, knowing full well the design will preform as expected and not flop over on it's side come launch day.

Only that launch day will never come.

Apolgizes if that wasn't clear: edited my first post.

[PAR]

In that case, it looks wonderful, how about a great cabin . . .

[gunship]

Originally Posted by PAR

In that case, it looks wonderful, how about a great cabin . . .

There already is one

I know the contradiction in asking for criticism and then refusing it, but the details of hull shape, rig balancing are things that I don't have a clue about, and to advanced to teach here. I do really appreciate your feedback, and I will look at these classes you've mentioned, but I'm a "hobby designer" who draws for my own amusement, and try to learn as much as possible in the process. I'm a poor student, so I cannot afford buying plans just for the fun of it - then I'd rather buy a good book about the same subject.

[gunship]

Originally Posted by michael pierzga

All great designs start off as a sketch, then mature. Your project resembles the Rhodes designed Abeking & Rasmussen built DOLPHIN I recently saw being refit....have a peek

http://www.palmawatch.com/project_do...ts_dolphin.htm

http://www.palmawatch.com/bilder/dol...e_exklusiv.pdf

Now that is one beautiful ship!