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How to estimate size of cargo hold?
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Snips
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PostPosted: Mon Jan 25, 2016 12:10 pm    Post subject: How to estimate size of cargo hold? Reply with quote

First off, math isnt my forte to say the least, so bear with me... Smile

Im trying to figure out the layout of a ship, and since I know the area of the cargo hold I figured I could somehow calculate the size of it, in metric ton. But after some googling I realized I needed help.

Say that the cargo hold is roughly 90 m2. How many tons of cargo* would that be?

*As in ship stat cargo hold.
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garhkal
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PostPosted: Mon Jan 25, 2016 5:01 pm    Post subject: Reply with quote

Depends. Which ship is it? Many of the freighters from the various source books have layouts, showing their cargo holds..
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Zarn
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PostPosted: Mon Jan 25, 2016 5:41 pm    Post subject: Reply with quote

Getting an estimate on the volume is easy. Converting that into a ship stat cargo number is more difficult.

Most ships seem to have pretty low headspace. For instance, Chewie tends to slightly duck when he walks around the Falcon, and the Falcon seems to be pretty thin if you consider the general shape of it.

So. The general rule would be area * average height. Figure slightly less than 2m as standard, perhaps, with individual variation.

In your case, that would mean that 90 square meters times 2m height equals 180 cubic meters in volume. Divide by two again (if I remember the fudge factors suggested correctly), and you end up with 90 tons cargo capacity.

This is in line with what a typical stock light freighter would have - somewhere between 75 - 200 tons cargo capacity.

So, all other things being equal, about one ton per square meter should give you somewhere to start your estimation, and then you'll need to fudge if it doesn't bring you where you want to be.
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CRMcNeill
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PostPosted: Mon Jan 25, 2016 6:45 pm    Post subject: Reply with quote

The WEG rule of thumb is 2 cubic meters per metric ton, so 90 metric tons converts to 180 cubic meters, as Zarn indicated. How this converts to square meters depends on the vehicle. The average semi box trailer is around 3 meters interior height, but it is almost unheard of to completely fill that volume with cargo.
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Snips
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PostPosted: Tue Jan 26, 2016 1:47 pm    Post subject: Reply with quote

Great! Im making some deck plans of the partys ship (a D5 Mantis converted to a freighter).

Ill post them on the forum when were done.
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garhkal
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PostPosted: Tue Jan 26, 2016 6:12 pm    Post subject: Reply with quote

What book is that mantis from? Looking through Gry's ships book, the only one with "Mantis" in the name is a custom designed fighter..
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CRMcNeill
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PostPosted: Wed Jan 27, 2016 12:22 am    Post subject: Reply with quote

It's one of the ship's from The Old Republic video game.
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JironGhrad
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PostPosted: Wed Jan 27, 2016 1:47 am    Post subject: Reply with quote

CRMcNeill wrote:
It's one of the ship's from The Old Republic video game.


Was that a KotOR game or SWTOR MMO?
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garhkal
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PostPosted: Wed Jan 27, 2016 1:51 am    Post subject: Reply with quote

So where did the stats come from?
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Snips
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PostPosted: Wed Jan 27, 2016 3:04 am    Post subject: Reply with quote

garhkal wrote:
So where did the stats come from?


I made them up. Smile
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Snips
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PostPosted: Wed Jan 27, 2016 3:05 am    Post subject: Reply with quote

JironGhrad wrote:
CRMcNeill wrote:
It's one of the ship's from The Old Republic video game.


Was that a KotOR game or SWTOR MMO?


I belive its from SWTOR, though I havnt played it myself.
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garhkal
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PostPosted: Wed Jan 27, 2016 5:06 am    Post subject: Reply with quote

Snips wrote:
garhkal wrote:
So where did the stats come from?


I made them up. Smile


Sweet.. See my comments for it!
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JironGhrad
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PostPosted: Sat Feb 06, 2016 12:28 am    Post subject: Reply with quote

CRMcNeill wrote:
The WEG rule of thumb is 2 cubic meters per metric ton, so 90 metric tons converts to 180 cubic meters, as Zarn indicated. How this converts to square meters depends on the vehicle. The average semi box trailer is around 3 meters interior height, but it is almost unheard of to completely fill that volume with cargo.


You've obviously never seen a UPS trailer. Having worked at a sort facility some years ago, they will pack those trailers to the brim. Although they're closer to 2m tall interior, most of the time; and around 18-20m long.
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CRMcNeill
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PostPosted: Sat Feb 06, 2016 12:50 am    Post subject: Reply with quote

I said almost unheard of. The instances where it does happen are for cargo that is high volume and light weight, such as UPS envelopes. I've also done loads of empty plastic containers that filled the entire volume of the trailer, yet only weighed a few thousand pounds. Of course, semi trucks can actually pull a lot more than they normally carry, but this is due to maximum legal weight restrictions, not actual carrying capacity. However, you will, on occasion, see flat bed trailers loaded with steel plate or rolled steel that look deceptively tiny, yet weigh in at 44-45,000 pounds.
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JironGhrad
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PostPosted: Sat Feb 06, 2016 2:52 am    Post subject: Reply with quote

CRMcNeill wrote:
I said almost unheard of. The instances where it does happen are for cargo that is high volume and light weight, such as UPS envelopes. I've also done loads of empty plastic containers that filled the entire volume of the trailer, yet only weighed a few thousand pounds. Of course, semi trucks can actually pull a lot more than they normally carry, but this is due to maximum legal weight restrictions, not actual carrying capacity. However, you will, on occasion, see flat bed trailers loaded with steel plate or rolled steel that look deceptively tiny, yet weigh in at 44-45,000 pounds.


I see what you mean. Although, I was speaking of boxes (all less than 70 lbs.) on the UPS trailers. Full those things average out around 18k lbs.
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