Metric ton conversion!
- Thread starter Shonner
- Start date
There isn't one. Metric tons is weight, d-tons are volume.
If you're thinking of how many cubic meters to a d-ton, it's either 13.5 or 14, depending on what rules you're using.
Hans
madmike
SOC-12
On a standard Classic Traveller deckplan with a 1.5 grid square, one(1) dT is 2 grid squares horizontally and vertically.
So length x height x width = 1.5x2 x 1.5x2 x 1.5 = 13.5dT
Freelance traveller site has an article discussing mass/dT conversions. From memory 5xdT = mass tonnage.
So length x height x width = 1.5x2 x 1.5x2 x 1.5 = 13.5dT
Freelance traveller site has an article discussing mass/dT conversions. From memory 5xdT = mass tonnage.
BlackBat242
SOC-14 1K
For a certain average density.
Filling the volume with small pieces of scrap iron would result in more mass-tons per dt.
Leaving the space empty (except for air) would result in fewer mass-tons per dt.
Ok. I found some stuff that also uses the 5 metric ton = 1 Traveller d-ton idea. How many d-ton would you say the '60s Enterprise NCC-1701 is? I have the Star Trek plans somewhere. I don't remember seeing metric tonnage listed for them though.
ADDED:
Ok, found it. The Enterprise is 190,000 metric tons. So that is 38,000 d-tons in Traveller. But that is assuming '60s Star Trek ships are made/manufactured the same as Traveller ships? Or we don't concern ourselves with this?
I know this is an old question from 36 years ago. But all my notes from back then were stored on a HP-2000F, with some lost translations on a DEC-20 in FORTRAN 77.
Yep. I was thinking more about the wall/floor/ceiling construction, and the piping.
Also, I notice that ALIEN's USCSS Nostromo is similar in size to the '60s Enterprise, but they list their metric tonnage vastly different. So I know that the Star Trek universe (the Star Fleet universe, technically) and the ALIEN universe are using different ship-building materials and methods.
Enterprise NCC-1701 Displacement
There was a website that analyzed (volumetrically) the sizes of many ships from SciFi (including Star Trek & Star Wars among others) by mathematical approximations.
CotI Thread: http://www.travellerrpg.com/CotI/Discuss/showthread.php?t=31084&highlight=displacement
Website: http://www.st-v-sw.net/STSWvolumetrics.html
IIRC, the NCC-1701 came in somewhere between 15,000 and 20,000 dtons, approximately.
There was a website that analyzed (volumetrically) the sizes of many ships from SciFi (including Star Trek & Star Wars among others) by mathematical approximations.
CotI Thread: http://www.travellerrpg.com/CotI/Discuss/showthread.php?t=31084&highlight=displacement
Website: http://www.st-v-sw.net/STSWvolumetrics.html
IIRC, the NCC-1701 came in somewhere between 15,000 and 20,000 dtons, approximately.
Traveller DTons (Displacement Tons, aka Starship Tons) aren't a measure of mass, but of volume ... 14 cubic meters each. (Tho' in TNE, an upper bound for drive calculations is 10 metric tons per DTon.)
190,000 would imply 19,000 Td... except that the enterprise is more dense.
the 211,000 cubic meters, calculated by ST vs SW Volumetrics (Henceforth STvSWV) is 15,089 displacement tons. STvSWV also (in the notes) comments on the density.
The larger volume of the uprated enterprise, as shown on STvSWV, is 234,928 cubic meters. That's 16780Td.
My own rough calculations came to 17KTd on several occasions, and 15.5Ktd on others.
one must be careful in looking at the various size units to understand what the units are.
I think I remember that post. Bounded box approximations. Those ships tend to look bigger as they are disbursed.
Technically speaking, meric tons are mass, not weight, equivalent at 1G.
Than makes me answer that the conversión would depend on the denisty of materilas, so, one dton of pure watr would be 14 metric tons (13.5 in MT), while one of iron would be 7.87 times that.
See that this could have importance if your hold is full of one cargo or another and the drives are given in tons of thust, as in MT pregravitic One Small Step or, IIRC, in some TNE or T4 drives(e.g. HEPLAR) or, in MT to calculate the loaded weight for agility pourposes (and you want added complexity, of course).
If the question was meant about ship's Gross Displacement Tons, each dton would be the equivalent to 14 m3 of volumen for the ship, and ,assuming about 35-50% of it is sumerged (IIRC, not sure about it), to about 5-7 tons of displacement for an ocean going ship.
So, the smallest dreadnough built (España class), that displaced about 16000 metric tons, would be about 2.5-3 kdton in Traveller, while the largest (Yamato), that displaced about 73000 metric tons, would be about 10-14 kdton in Traveller.
I actually worked from the SFTM drawings... and got 17ktd. ± 1000 Td allowing for line, thickness.
