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Snips Cadet
Joined: 23 Jan 2016 Posts: 19
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Posted: Mon Jan 25, 2016 12:10 pm Post subject: How to estimate size of cargo hold? |
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First off, math isnt my forte to say the least, so bear with me...
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 Sovereign Protector
Joined: 17 Jul 2005 Posts: 14168 Location: Reynoldsburg, Columbus, Ohio.
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Posted: Mon Jan 25, 2016 5:01 pm Post subject: |
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Depends. Which ship is it? Many of the freighters from the various source books have layouts, showing their cargo holds.. _________________ Confucious sayeth, don't wash cat while drunk! |
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Zarn Force Spirit
Joined: 17 Jun 2014 Posts: 698
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Posted: Mon Jan 25, 2016 5:41 pm Post subject: |
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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 Director of Engineering
Joined: 05 Apr 2010 Posts: 16281 Location: Redding System, California Sector, on the I-5 Hyperspace Route.
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Posted: Mon Jan 25, 2016 6:45 pm Post subject: |
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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. _________________ "No set of rules can cover every situation. It's expected that you will make up new rules to suit the needs of your game." - The Star Wars Roleplaying Game, 2R&E, pg. 69, WEG, 1996.
The CRMcNeill Stat/Rule Index
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Snips Cadet
Joined: 23 Jan 2016 Posts: 19
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Posted: Tue Jan 26, 2016 1:47 pm Post subject: |
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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 Sovereign Protector
Joined: 17 Jul 2005 Posts: 14168 Location: Reynoldsburg, Columbus, Ohio.
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Posted: Tue Jan 26, 2016 6:12 pm Post subject: |
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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.. _________________ Confucious sayeth, don't wash cat while drunk! |
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CRMcNeill Director of Engineering
Joined: 05 Apr 2010 Posts: 16281 Location: Redding System, California Sector, on the I-5 Hyperspace Route.
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Posted: Wed Jan 27, 2016 12:22 am Post subject: |
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It's one of the ship's from The Old Republic video game. _________________ "No set of rules can cover every situation. It's expected that you will make up new rules to suit the needs of your game." - The Star Wars Roleplaying Game, 2R&E, pg. 69, WEG, 1996.
The CRMcNeill Stat/Rule Index
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JironGhrad Lieutenant Commander
Joined: 20 Jan 2016 Posts: 152
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Posted: Wed Jan 27, 2016 1:47 am Post subject: |
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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 Sovereign Protector
Joined: 17 Jul 2005 Posts: 14168 Location: Reynoldsburg, Columbus, Ohio.
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Posted: Wed Jan 27, 2016 1:51 am Post subject: |
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So where did the stats come from? _________________ Confucious sayeth, don't wash cat while drunk! |
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Snips Cadet
Joined: 23 Jan 2016 Posts: 19
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Posted: Wed Jan 27, 2016 3:04 am Post subject: |
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garhkal wrote: | So where did the stats come from? |
I made them up. |
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Snips Cadet
Joined: 23 Jan 2016 Posts: 19
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Posted: Wed Jan 27, 2016 3:05 am Post subject: |
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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 Sovereign Protector
Joined: 17 Jul 2005 Posts: 14168 Location: Reynoldsburg, Columbus, Ohio.
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Posted: Wed Jan 27, 2016 5:06 am Post subject: |
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Snips wrote: | garhkal wrote: | So where did the stats come from? |
I made them up. |
Sweet.. See my comments for it! _________________ Confucious sayeth, don't wash cat while drunk! |
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JironGhrad Lieutenant Commander
Joined: 20 Jan 2016 Posts: 152
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Posted: Sat Feb 06, 2016 12:28 am Post subject: |
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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 Director of Engineering
Joined: 05 Apr 2010 Posts: 16281 Location: Redding System, California Sector, on the I-5 Hyperspace Route.
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Posted: Sat Feb 06, 2016 12:50 am Post subject: |
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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. _________________ "No set of rules can cover every situation. It's expected that you will make up new rules to suit the needs of your game." - The Star Wars Roleplaying Game, 2R&E, pg. 69, WEG, 1996.
The CRMcNeill Stat/Rule Index
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JironGhrad Lieutenant Commander
Joined: 20 Jan 2016 Posts: 152
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Posted: Sat Feb 06, 2016 2:52 am Post subject: |
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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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