Volume per square

[moout_diablo]

IIRC, most of the deckplans I've seen are 1.5 meter scale. Can someone verify for me that 1.5 meter squares equal about .5dt? I'm playing with Cosmoprapher and I wasn't sure of the approximate displacement of the test ship I had sorta designed.

 

[far-trader]

Yep, that is the supposed scale for most Traveller editions, with a deck height of 3m.

TNE was an exception, it used 2m squares of 3.5m height being 1ton.

GT uses a 5 feet scale instead, which is close to 1.5m and translates pretty much the same, one square is 1/2ton.

 

[moout_diablo]

Thought so. Thanks!

 

[far-trader]

You're quite welcome.

 

[aramis]

1.5x1.5x3=
(1.5+.5+.25)x3=
2.25x3=6.75

thus the 1.5m square with 3m decktop-to-dektop gives 2 squares per MT Td (13.5=2x6.75)

14/13.5=7/6.25=700/625=140/125=28/25=1.12

Thus it is most properly 224 squares per 100Td at 14 CT/TNE/T4 Td. For simplicity, every 4 tons (8 squares) is an extra square.

Note that TNE uses 2x2x3.5m squares. Thus, at 2m squares, TNE uses 1 square per Td.
4x3.5=12+2.0=14

And the GURPS Td is IIRC 500cu ft, at 5x5x10' per square, thus one square is 250 cu ft.

 

[Straybow]

An idea to mess with your heads

Why should deckplans be limited to fixed heights? Space is at a premium, and any designer should take advantage of the differing needs for space.

 Tile    Nº    Deck
 Size  Tiles  Height   Description
1½×1½    3½   1.78m    Cockpit
1½×1½    3    2.07m    Tight
1½×1½    2¾   2.26m    Average
1½×1½    2½   2.50m    Comfortable
1½×1½    2    3.11m    Airy
1½×1½    2    3.11m    Std Cargo

 2×2     2    1.75m    Cockpit
 2×2     1¾   2.00m    Tight
 2×2     1½   2.33m    Average
 2×2     1¼   2.80m    Comfortable
 2×2     1    3.50m    Airy
 2×2     1    3.50m    Std Cargo

On the bridge and certain other work spaces stations make them face the outside, where the hull of the ship may be steeply sloped. These would be "cockpit" tiles with the average height being ~1½m (after allowing for deck thickness). Behind the console and under the desk you need no headroom, and only "full height" ~2m at the back edge of the tile where it meets "average" or "comfortable" ceiling height for the center of the bridge. The sloped surface can provide more indicators and controls for the seated crewman to use.

In crew quarters, a "tight" configuration would be expected. In passenger staterooms (only half the 4dT assigned in many deckplans) an "average" ceiling height would be appropriate. In fact, a small room may feel even smaller if the ceiling is disproportionately high. Place bunks against a sloped hull to stretch the floor space a bit more. Hallways and commons would have "comfortable" or better headroom.

This also helps calculate space for fuel in those awkward corners and gaps. You might be able to get 50% more tiles into your deckplan this way.

 

[vegascat]

For deck height, consider how tall the normal tall being for whatever race will be using the ship. Add 25% for overhead clearance. Add more clearance for deck thickness, structural members, piping and ventilation ductwork, control runs, power systems, gravity systems, and space to access maintenance points.
Residential structures have varied ceiling height over the years, depending on the resources available, lifestyle and climate. The norm now is 8 to 10 ft with 12in floor thickness. Commercial structures use 10 to 12 ft ceiling space with drop ceilings for utilities of about 3ft more.

Using angled ceiling space in areas where the compartment is against the hull makes sense in some cases, but not if a person is expected to stand or do maintenance in that area. Using angels hull space would be fine for mechanical areas that do not need any maintenance done, port holes and fuel tankage. Stacking bunks in compartments on vessels that allow crew off at every port. An average deck to ceiling height of 3M, 10 Ft would be appropriate for most purposes

 

[Fritz_Brown]

Straybow, the rules specifically state the 3m is average. And, they also state that all those sloping areas are full of fuel....

vegascat, as I work in a hi-tech, secure, environment, we have a 10 foot ceiling, with a 1ft space beneath our feet - a false floor where all the cabling is run. It's interesting, as the floor is composed of 2ftx2ft squares layed on a grid - don't bother trying to sneak up on anyone. Its a lot like a ship with grav plating on the floor.

 

[aramis]

Fritz:

TNE specifically states 3.5m
GT specifically states 10'

The others state 3m as standard.

 

[atpollard]

Why should deckplans be limited to fixed heights? Space is at a premium, and any designer should take advantage of the differing needs for space.

If we assume 1 to 1.5 meter ceiling heights, then some of the Classic Traveler deckplans will work. (you all know which ones I mean).

 

[Fritz_Brown]

Well, I wouldn't know about GT....