Depending on the rules you are using the vehicle builds produce mass tons as an
output. Anything built with MT rules, FF&F (either version) or GURPS Vehicles
would have a mass.

	If you have specific vehicles you are considering, you either look for the
corresponding vehicles listed in those versions of the rules. Or post
questionable vehicles here and someone may be able to reproduce them in one of
the above design systems.

	From the T20 Travellers' Aid books on Vehicles (which I wrote):

 > HOW BIG IS MY VEHICLE?
 > The volumes (vls) used by the T20 vehicle design system represents both
 > weight and volume. This is an abstraction to make the vehicle design
 > process easier and faster. You can calculate the real world sizes for
 > vehicles by doing the following. Calculate a vehicle’s volume by
 > multiplying the vls by 5 to get the size in liters, then divide by
 > 1000 to get cubic meters, and again by 14 to get starship tons. A
 > vehicle’s loaded weight in kg is equal to its size in vls. To get an
 > empty weight, subtract 100kg for each passenger and 1kg for each 1vl
 > of cargo.

 > You can estimate the size of a [waterborne] ship in vl by multiplying
 > the rated displacement tons by 600. For example, a 100-ton ship would
 > be about 60,000vl. Submarines, in order to sink and rise, are much
 > closer in volume to their tonnage. Estimate the size of a submarine
 > by multiplying its rated displacement tons by 200. For example, a
 > 100-ton submarine would be about 20,000vl.

	These are estimates, and can be taken with as many grains of salt as you desire.

On 7/4/2021 3:20 PM, Charles McKnight - chuckmcknight at pheonic.com (via tml
list) wrote:
> Hi All,
>
> I just finished entering the 632 items for essentially guns and armor from
> Traveller 5.10 and I’m about to start on vehicles for the catalog. With that, I
> know that vehicles are measured by their displacement volume (tonnage), but I
> don’t recall ever seeing anything about the actual mass of the vehicle. For
> those that float, fly, or hover, it may not be much of an issue but for
> wheeled/tracked vehicles (and flying / hovering vehicles at rest) I’m wondering
> how folks calculate vehicle mass.
>
> Examples where this might matter:
>
>   * Aircraft on a terrestrial elevated surface (helidpad, etc.)
>   * Wheeled/tracked vehicles on bridges
>
>
> I know that the mass of alloys can vary greatly (and of course there is the
> mythical handwavium), but having seen bridges and other elevated structures
> collapse due to the weight of the vehicles on them in real life, I’m curious if
> anyone actually goes to that length to calculate vehicle mass and if so how it
> might be done.
>
> Thanks in advance!
>
> Chuck
>
> -----
> The Traveller Mailing List
> Archives at http://archives.simplelists.com/tml
> <http://archives.simplelists.com/tml>
> Report problems to xxxxxx@simplelists.com
> To unsubscribe from this list please go to
> http://www.simplelists.com/confirm.php?u=QWmJ5KKpHa3MBU63jjs3knG6o9jLMkSu
>

--
         Thomas Jones-Low
Work:	xxxxxx@softstart.com
Home:   xxxxxx@gmail.com