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furyGer

Swedish Ship Collection, af Chapman (With Plans)

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20-gun Privateer, Architectura Navalis Mercatoria Plate XXXVI

 

lcncaMI.jpg

 

(slightly edited by yours truely)

 

 

Dimensions (imperial)

 

length P/P:                            116' 7''

breadth:                                  30' 7''

draught aft:                             14' 3''

 

length-to-breadth ratio:            3,8

 

 

Armament:

 

20 6-pounders

32 3-pounders

2 4-pounder bow chasers

 

Crew:

 

220

 

 

Probably my favourite plan in the ANM, because this is exactly the type of vessel I like the most, small, fast and packs quite a punch. And it shows very innovative features for the time the draught was made (early 1760s) like a flush deck and the diagonal bracing.

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Malachi, friends don't let friends fully arm their spar decks.

Its looks like a good privateer. The stern rake will be endless and you will never need to worry about sail tagging. :P

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Its looks like a good privateer

 

 

Well, you find the plan for this ship in the 'Privateer' chapter of the Architectura Navalis :P

 

As a bonus, it has one hell of a nice hull shape:

 

4GHj7cb.jpg

 

Don´t mind the square bow, I was just curious how the plan would look like in 3D, so this just a quick and dirty model I made yesterday.

 

Theoretically, the 32 3-pounders could be omitted and the 20 6-pounders could be upgraded to 8-pounders (with 1430 pounds to spare). Now that would be a nice and powerfull privateer.

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20 9 pounders sounds great especially with bow chasers. I'd throw a recommendation on it in next years voting just because I love baby frigates. ;)

 

Though I do wonder if it will be speedy enough and not rather sluggish like the snow.

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Nice, I've never seen the book compiled in one place like that before.

 

Chapman really like large merchant vessels. Humble cats and hagboats the size of Trincomalee.

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I'd like to know if anyone has managed to find blueprints for either Rikskronan (Kronan II) or Konung Karl. Those are two big ships that I would really enjoy seeing in-game, although I haven't found any real "blueprints". Only pictures.

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so I am getting closer to beeing finished.

The outside is done but the gunport lids which I will do somethime later this week.

http://imgur.com/a/fliPa

http://imgur.com/99UC14P

 

The colourschemeis now according to the ship model here

If not, please tell me :)

 

edit:

http://imgur.com/6RL6iRT

 

edit edit:

http://imgur.com/a/W6wLE

 

http://imgur.com/R904Ifu

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all right.

after months of work, a metric arse ton of work into my first ever 99% ready model here she is:

https://skfb.ly/Pn9W

please ignore the glitch in her stern gallery as well as on her stern gunports.

Those come from the upload page.

 

99... where is the 1%? the helm is missing. And maybe I make a rudementary stove. who knows..

 

edit: apparently each gunport of the upper gundeck is glitched.

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The screen is pitch black and flashes a purple silhouette of the ship when I change the view around. o.o

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The screen is pitch black and flashes a purple silhouette of the ship when I change the view around. o.o

What browser did you use? on Firefox i had your issue however on chrome it is perfectly fine, and i really like the model bungee, looks nice :D

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The SoL draughts have three stability points marked on them.

 

I assume that the bottom one is is Center of Buoyancy, and the middle one is Center of Gravity. Is the top point the Metacentre at some given angle of heel?

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Never noticed the three points on Chapman´s late work. The bottom point is B/Center of Buoyancy, the other two points should be the metacenters for different load waterlines (cf. Plate XXI, Fig. 5, ANM)

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Never noticed the three points on Chapman´s late work. The bottom point is B/Center of Buoyancy, the other two points should be the metacenters for different load waterlines (cf. Plate XXI, Fig. 5, ANM)

Are you sure? Why would the middle point be a different size if it was just another metacenter?

 

That book on Chapman that you recommended has the answer to this question, but I returned it to the library.

 

If both upper dots are metacenters, isn't it more likely that they are for different angles of heel? The difference between them seems extreme.

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Hang on a minute, because I thought I understood the whole metacentre concept.

 

When you aren't heeling, there is no metacentre at all because there is no righting arm. So when Chapman rights that a privateer should have a metacentric height of 6 feet, he must be envisioning a specific angle of heel. How do we know what that angle is on his plans?

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My bet goes on malachi.

Chapman calculated his ships empty and fully loaden. Hence the two dots can very likely be the two differently weighted centers

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When you aren't heeling, there is no metacentre at all because there is no righting arm. So when Chapman rights that a privateer should have a metacentric height of 6 feet, he must be envisioning a specific angle of heel. How do we know what that angle is on his plans?

 

 

That´s the stuff that´s in his Treatise. All metacenter calculations are for a 3° heel, if I remember correctly.

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That´s the stuff that´s in his Treatise. All metacenter calculations are for a 3° heel, if I remember correctly.

Huh. That information doesn't seem like it would be very relevant from a stability standpoint. Maybe for gunnery.

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Huh. That information doesn't seem like it would be very relevant from a stability standpoint. Maybe for gunnery.

Wait a minute, I see my mistake.

 

I was inclining vessels in my head and convinced myself that the metacenter would be different at various heel angles. But it isn't.

 

http://www.cruisingonstrider.us/Metacenter.htm

 

Mental geometry is hard.

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