Off the wall megaprojects like this, IMO, is where FFS2 comes into it's own.

Empty volume is cheap in terms of mass - it just affects surface area, and a little bracing. You dont need to assume 10t per dton when building a shop, as the two staff are already budgeted for their stateroom, and you dont need increase the size of the jump drives, with all that that entails, as you dont have any.Its pretty usual to assume half the 'stateroom space' is going into public areas, which includes shops and so on, so if you do that, you've got a bunch of volume to play with.

Onto specifics - think of Command Modules by adding up all the local police stations, pumping station, electricity substation, gas line monitoring stations and so on in your nearest city of 6 million people.

12.5 mtons of TL15 power plant is IMO a little high for 6m people - thats a power budget in the tens of megawatts each.

The docking space is too small, although it - being Core sector - probably involves a lot of "hot bunking" of ships, where they come in, unload cargos, load the new ones and leave.


On Thu, Sep 25, 2014 at 7:55 AM, Timothy Collinson <timothy.collinson@port.ac.uk> wrote:


As a change from bibliography work (you may be pleased to hear), I thought I'd have a go at creating something.  As Supplement 14: Space Stations arrived in the post today, that seemed the obvious choice.

Naturally I thought I might start BIG!  As the table on page 3 lets you think about 5 billion tons or more.  However, that's TL20 so let's be more modest...

Plus, for the adventure I ran last year at TravCon I had "designed" (without all these details) a 1000 deck station for the 6,000,000 inhabitants of Anther (near Capital in Core Sector).  That's TL14 so the table lets me go up to 1 billion tons.  Seems like a good place to start for a monster station.

Most has gone ok, although quite the largest tonnage thus far is taken up by residential space (not surprising when you've got 6,000,000 people). Out of the air I've plucked 'luxurious' quarters for 10,000 and Hi quality for 100,000 the rest being mid quality.  So that's some 24,000,000 tons.

However, one thing seems surprisingly out of line with what might I might expect and that's another large portion of the (so far) allotted tonnage.  Command modules.  I have to have 5 sections (for space stations over 200,000 tons) - that's fair enough.  I have to have one command module per section which also seems reasonable.  BUT each command module takes 0.2% of the station.  That's 2,000,000 tons *each*.  10 million tons total.  It seems way out of kilter for what's being described as essentially a starship bridge - although maybe somewhat bigger.  The cost (at MCr0.1 per ton) is also then a huge proportion of the cost (so far) at MCr1,000,000.  Yes, that's a million *megacredits*.  Thus far the whole thing only costs MCr3.3 (pretty much all the rest of the cost is residential units).

Am I doing something wrong?  Reading the rules incorrectly?  Doing the math wrong?  Anyone else run into this?


While I'm here... how on earth do you work out what would be appropriate commercial space for such a station?  (shops, malls, arcades etc).  There's no guidance and I've chucked in 20,000 tons just for something to be going on with but I think this may be woefully inadequate.  Especially if residential space is over 20,000,000 tons.  Anyone got a rule of thumb?

I'm also wondering if Docking Space of 300,000 tons (which allows up to 100,000 tons of docked ship) isn't a bit small as well.  This is a major station, one Jump from Capital, A-class port, on x-boat routes.  I'm guessing there will be a *lot* of ships berthed and coming and going and this would only allow for thirty 10,000-ton ships (or 300 1,000 tons), so I reckon I might go up to a million tons of docking space.

Oh, and just for info: the Power Plant (presumably a lot of them spread out through the station) comes to 12,500,000 tons!  (and M Drive for station keeping at 7,500,000 tons).  I think there will be a few engineers!  But that's a chapter for tomorrow night.  Bed now...

tc

PS one of the things I put in my description last year was that every deck was 6m high instead of the usual 3m (ish).  So yes, it's at least 6km long/tall!   Nothing in these rules affects that or is affected by that but surely it should affect tonnage or costs at some point?





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