Ship design. Size of units

[kirstar]

When putting together deck plans how much space do things take.

For example a stateroom is 4 tons

How much deck space does it take up ?

I seem to recall a each ton is 14 cubic meters

So this would mean a cube 3x3x4.6m in size (assuming 3m height including hidden machinery

Just a box yo could have a height at 2.5m

So 2.5x3x7.47 m a bit big.

Is there an oficial answer ?

 

[fireyphoenix22]

ee this thread

drawing deckplans

good post by far-trader

 

[DFW]

ee this thread
http://www.mongoosepublishing.com/forum.php

The link isn't to a thread.

 

[DFW]

I seem to recall a each ton is 14 cubic meters

A ton = 13.5 m3

4 1.5 meter cubes. 2 long X 2 high

 

[kirstar]

So a state room would be 6x3x3m roughly

how much would you allocate to teh map so that you had corridors and common spacing etc

 

[DFW]

So a state room would be 6x3x3m roughly

how much would you allocate to teh map so that you had corridors and common spacing etc

Generally you use 1/2 the tonnage for the items you mention. So, a stateroom ends up being 4 deck squares.

 

[silburnl]

So a state room would be 6x3x3m roughly

how much would you allocate to teh map so that you had corridors and common spacing etc

The rule of thumb most trav deckplan mongers seem to follow is a 50/50 split between private and public spaces. Personally (and having recently seen a documentary about the building of Astute class subs that reinforced this impression) I think that is a seriously generous overallocation of bunk space. If I were doing deckplans I'd put the split at 25/75 - even that's probably overgenerous, but it's easy to calculate.

Note that most deckplans you see have a bit of windage in their notional volumes if you actually count squares.

Regards
Luke

 

[kirstar]

Well I am a member of a design forum for star wars ships and wondered as I have got used to "good" designs.

Have a look
http://swdesignalliance.com/gallery/

One of my designs here

http://homepage.ntlworld.com/marc.savage/snow/01_0108_WIP.png
http://homepage.ntlworld.com/marc.savage/snow/02_0108_WIP.png
http://homepage.ntlworld.com/marc.savage/snow/03_0108_WIP.png

 

[AndrewW]

It's not half more like 3/4 for the stateroom. Traveller deckplans are usually 6 squares for the staterooms, taking 3 tons and leaving 2 squares (1 ton) for other space.

Barracks space at the same ratio would be 3 squares (1.5 tons) leaving 1 square .5 tons) for other space.

 

[AndrewW]

Note that most deckplans you see have a bit of windage in their notional volumes if you actually count squares.

Regards
Luke

The way things work out sometimes extra space is needed for corridors in areas other then staterooms so this does happen sometimes.

 

[silburnl]

The way things work out sometimes extra space is needed for corridors in areas other then staterooms so this does happen sometimes.

True, although I also think the standard grid encourages deckplan designers to put in overly large corridors and circulation spaces also. Corridors should be half a square wide in a lot of places if you ask me.

Regards
Luke

 

[rust]

True, although I also think the standard grid encourages deckplan designers to put in overly large corridors and circulation spaces also.

At least the results seem quite different depending on whether the desig-
ner used the square grid to design the ship or first designed it and then
did overlay (underlay ?) the square grid. Meanwhile I prefer the second
method for my few deckplans, the results feel more plausible to me.

 

[DFW]

Corridors should be half a square wide in a lot of places if you ask me.

That would only be 30 inches wide...

 

[far-trader]

see this thread

drawing deckplans

good post by far-trader

I missed this earlier, I think this is the thread fireyphoenix meant:

http://www.mongoosepublishing.com/phpBB2/viewtopic.php?t=43413

Briefly, I use half the tonnage stated for a component as the actual item, the other half is common spaces, access, and such. So a 4ton stateroom would be 2tons of cabin (4 squares = 3m x 3m with 3m deck height, with utilities and such in the overhead - "ITS IN THE VENTS!!" ). The other 2tons would go towards galley, corridors, mess, and other comforts.

 

[AndrewW]

True, although I also think the standard grid encourages deckplan designers to put in overly large corridors and circulation spaces also.

At least the results seem quite different depending on whether the desig-
ner used the square grid to design the ship or first designed it and then
did overlay (underlay ?) the square grid. Meanwhile I prefer the second
method for my few deckplans, the results feel more plausible to me.

The grid helps with determining how much space each item takes when drawing things out.

 

[kirstar]

Cool thanks

 

[Mongoose Pete]

Corridors should be half a square wide in a lot of places if you ask me.

That would only be 30 inches wide...

Actually 30 inches is quite generous, on military ships at least. The following photos are ones I took on HMS Småland, a decommissioned Swedish destroyer with a crew of two hundred and some. The corridors were quite functional as long as you turned sidewards to pass one another.

Hatchway
Gun rack
Corridor

Saying that, most modern passenger liners don't have corridors that much wider in the accommodation sections either, between 36 and 48 inches (90 and 120cm) depending on the cabin class.

 

[DFW]

Actually 30 inches is quite generous, on military ships at least. The following photos are ones I took on HMS Småland, a decommissioned Swedish destroyer with a crew of two hundred and some. The corridors were quite functional as long as you turned sidewards to pass one another.

You're right. On a merchant ship 30" looks to be fine. Thanks for the good pics!

 

[far-trader]

...Saying that, most modern passenger liners don't have corridors that much wider in the accommodation sections either, between 36 and 48 inches (90 and 120cm) depending on the cabin class.

Now add a reasonable thickness for walls on each side (at least 10cm, more like 30cm imo to incorporate mechanicals) and you come close to or fully using the standard 1.5m square. It works for me, and more to the point as the original intent was a simple system utilizing 1.5m squares it seems logical to explain what takes up the 1.5m corridor width (1.2m clear and 0.3m walls, imo) than change the measurement system to make tight corridors work. But whatever

 

[Mithras]

You watched it too, eh? And like me was just watching it for information on how to build a starship???

So a state room would be 6x3x3m roughly

how much would you allocate to teh map so that you had corridors and common spacing etc

The rule of thumb most trav deckplan mongers seem to follow is a 50/50 split between private and public spaces. Personally (and having recently seen a documentary about the building of Astute class subs that reinforced this impression) I think that is a seriously generous overallocation of bunk space. If I were doing deckplans I'd put the split at 25/75 - even that's probably overgenerous, but it's easy to calculate.

Note that most deckplans you see have a bit of windage in their notional volumes if you actually count squares.

Regards
Luke