• Welcome to the new COTI server. We've moved the Citizens to a new server. Please let us know in the COTI Website issue forum if you find any problems.

Hydroponics Bay and Still size/cost?

So

A deck squares is usually 1.5meters (5 feet) on a side. Assuming standard deck height (3 meters, including floor and ceiling), 2 squares is equal to 1 displacement ton. 6 deck squares would therefore be 3 tons.

assuming something like this

http://img.tjskl.org.cn/nimg/96/85/...d_grow_lights_for_indoor_plants_and_crops.jpg

in Traveller deck square terms is an 18" x 5' tray each side of a 2' walkway that's 15 square feet per layer per square. Say 4 or 5 layers per square that's 60 or 75 square feet per square or 120/150 square feet of growing surface per two deck squares (one dton).

Say 150 as it works out neater later on then 2 squares on a standard Traveller deck plan

e.g. http://th08.deviantart.net/fs70/PRE/f/2013/156/b/4/deckplans_in_the_rough_by_arcas_art-d67x9he.jpg

is roughly 1/300th of an acre using 3D space (if I did the sums right).

Then taking timerover's link

http://www.nss.org/settlement/ColoniesInSpace/colonies_chap09.html

which suggests 920 lb potatoes/tomatoes per acre per day using space-age techniques that's roughly 3 lbs per day (or 30 lb in ten days) per two squares of deck space so going back to

you could plausibly argue that your yield is a bushel of 60 pounds

if a dton of deck space can produce 30 lbs per ten days that's half a bushel per dton

You should get about 3 to 4 gallons of 200 proof vodka per bushel

3 to 4 gallons per bushel say 15 litres of 200 proof or 30 litres of 100 proof

so 15 litres of 100 proof per dton of deck space per ten days.

#

The other side is how much does a dton (volume) of liquor represent?

A traditional 12 bottle wine box (4x3) is 20" x 13"

http://www.thewonderfulwoodcompany.com/products-page/12-bottle-original-size-boxes/test-product/

so in a Traveller deck square (5' x 5') that's maybe 3x4 boxes at maybe 6 layers of boxes per square that's 72 boxes per square or 144 boxes per dton (as two squares are a dton).

(144 boxes x 12 containers per box x 3/4 litre per container = 1296 litres)

This appears to be pretty firmly inside the ballpark. I googled an Australian whisky shop and checked the prices for American bourbon. Assuming 4$ = 1 credit, prices range from Cr11 and up. Many range from 20-25 credits. The most expensive is Cr44. Assuming the bottles are fifths, you should multiply the numbers by 1.33 to get the liter prices.

which if you take the book 2 liquor trade price of 10,000 cr per dton is about right: c. 8 cr per litre wholesale for 16 cr retail.

#

so... getting confusing ... if the sums are right then

1 dton of (cheap) trade liquor (10,000 cr) is c. 1296 litres of actual liquor
1 dton of deck space supplies enough for 15 litres per ten days

so

Ok, so 14 dTons will get at most 75 Liters of 100 proof vodka which is still way under the sellable amount of 1 ton by my understanding.

14 dtons of deck space would produce 210 litres in ten days which would be roughly 1/6 of the amount in my estimated trade system dton of liquor

So you could say
- every six jumps they had a dton of liquor to sell
- they could sell 1/6 of a standard size lot each jump
- do some hi-tech handwaving and say improved tech means they can produce more than 1/6 of a dton per ten days. double it and they have a dton per month, triple it and they have a dton every two jumps, which with a base price of 10,000 and some good rolls could make a nice profit
- let the player experiment with special recipes that allow selling at 2x or 3x the standard low price (and unsellable if a mistake is made)

I think what I'd do is
- double the production numbers for higher tech so 14 dtons of deck space can produce a dton of vodka per month instead of two months
- small discount to life support costs for the extra oxygen from the plants
- a monthly roll for the quality of the batch, success gets a DM when selling
- distilling skill, start at rank zero, adds to quality roll
- create adventures around ingredients e.g. rumors that Inthe tomatos are particularly good for vodka, make up some rules for blending different ingredients to make the perfect vodka, bonuses to the monthly roll for ingredients and blending etc

turn it into a thing

#

nb the sums may be wrong but it feels about right to me, 14 dtons would be about 1/5 of a Free Trader's cargo space

by these calcs it wouldn't be profitable except with good resale rolls but if you turned it into a thing so over time the player can get bonuses to their resale rolls for the quality of the vodka they produce then eventually it could become profitable.
 
Growing plants take carbon dioxide out of the air, use the carbon to build plant matter, along with some of the oxygen, and release the rest of the oxygen. I was wondering how much CO2 would be present in the average ship to produce plants. I came up with the following.

If you maintain a standard atmospheric pressure of 14.7 pounds per square inch, in 500 cubic feet of space, about 1 Traveller displacement ton, you have 38.29 pounds of air. Only a small portion of that is CO2, which is present in about a concentration of 0.04%, or 0.0004. That would make the mass of carbon dioxide present in 1 Traveller displacement ton equal to 0.0153 pounds.

That would give a 1000 Traveller dTon ship, assuming that it was totally filled with air at Earth atmospheric pressure, which would not allow for any fuel tanks or other space occupying material, like drives, cargo, or internal structure, at total internal mass of 15.3 pounds of Carbon Dioxide. As this is a closed system, your crew will be adding to this CO2 concentration during the one week Jump time. Since respiration varies according to activity level, this could have a pretty wide range. However, your life-support system is going to be removing excess CO2 from the atmosphere of the ship. You could have the life-support system dump the excess CO2 into the hydroponics areas, but this would have to be just about built into the ship.

I am not sure exactly how much CO2 the average person produces in a day, but I would suspect that it is not more that a couple of pounds, if that, based on food consumption of roughly 3 to 5 pounds per day. (Note, one online source quotes human production of CO2 via respiration of 900 grams or just about 2 pounds.) That would give you an additional 14 pounds or 6.3 kilograms of CO2 per week to work with per person on board, if human.

Based on all of this, unless you have a really large ship, with at least a 1000 humans or more on board, you are going to have a real hard time producing large quantities of potatoes, or anything else, with hydroponics.
 
Another issue to consider is the danger involved in alcohol production. The classic "moonshiner's still" is usually considered to be a 20-gallon pot still, has an output of one to two gallons a week (depending on product quality desired), and can explode with about the force of five sticks of dynamite if the moonshiner screws up. Now, you folks are talking about scaling this up to how big an operation? From the sound of things, the original proposal was for distilling on an industrial scale - plus the hydroponics plant to supply the raw materials.

I'd say that running such an operation would be about equivalent to running a small-scale factory operation - only the fact that it's based aboard a ship is any way unusual. But this does bring in the possibility of industrial-type accidents (on board a ship, possibly in jump-space!) among other things. In fact, you also need to consider that this is essentially two industrial plants - one distilling, one farming - to maintain.

All in all, this is not a simple question, but it is one with possibilities.
 
Last edited:
Regardless of the specifics, a simple analysis of this is: while another merchant ships are shipping finished products or refined raw materials, your PCs are suggesting taking the product's factory, and in fact production system (hydroponics as opposed to the whole farm) along with you. That can't be competitive unless you have a situational reason why the space is otherwise unusable.
 
Regardless of the specifics, a simple analysis of this is: while another merchant ships are shipping finished products or refined raw materials, your PCs are suggesting taking the product's factory, and in fact production system (hydroponics as opposed to the whole farm) along with you. That can't be competitive unless you have a situational reason why the space is otherwise unusable.

You're right it can't be competitive - it can't even be economic without high resale rolls when you consider the opportunity cost of the lost 14 dtons...

(a dton of liquor in a month means 14 dtons not used as cargo space for two jumps so a lost 28,000 cr)

... However if a player wanted it as a quirky hobby for their character then it's interesting to see where it might lead.

#

My rough (and probably wrong) calcs seemed to suggest the 10,000 cr value per dton of liquor in the Bk 2 trade system comes out at roughly 8 cr per liter (for 16 cr per liter retail) which ties in with the low end of the prices mentioned upthread with the high quality prices going up to at least five times as much.

A dton of liquor at 10,000 cr per ton is one thing but at 50,000 cr per dton is something else.

That creates the opportunity - if the player was into it - of making the space vodka into a thing i.e. creating "ranks" of vodka where each rank has a higher price than the base, create a distilling skill started at skill-0 which can improve, seed the universe with say four special ingredients per sub-sector and create an adventure arc out of searching for special ingredients and blending to create a unique and higher priced vodka.

Also if they're using up a lot of their cargo space with hydroponics / distilling then they'll possibly need more side adventuring to pay the bills.

So the campaign could become trading around to pay the bills while trying to blend the perfect vodka and all the adventures that ensue from that.

They might not be into that but it's the sort of campaign idea I like.

#

Industrial accidents sounds like another fun side effect of the idea

#

The carbon dioxide point makes sense - dunno how you'd get around that - can you make CO2 out of waste and oxygen?

(as you'd get the oxygen back)
 
You're right it can't be competitive - it can't even be economic without high resale rolls when you consider the opportunity cost of the lost 14 dtons...

(a dton of liquor in a month means 14 dtons not used as cargo space for two jumps so a lost 28,000 cr)

... However if a player wanted it as a quirky hobby for their character then it's interesting to see where it might lead.

And I got hammered for suggesting that merchant traders might want luxury space for personal comfort...

Okay, if it's not a problem, it's not a problem. Maybe they can market it as "jumpspace aged."
 
And I got hammered for suggesting that merchant traders might want luxury space for personal comfort...

Okay, if it's not a problem, it's not a problem. Maybe they can market it as "jumpspace aged."

Sell it as anagathic vodka like wild west snake oil sellers - just make sure to stay one step ahead of the law :)
 
Regardless of the specifics, a simple analysis of this is: while another merchant ships are shipping finished products or refined raw materials, your PCs are suggesting taking the product's factory, and in fact production system (hydroponics as opposed to the whole farm) along with you. That can't be competitive unless you have a situational reason why the space is otherwise unusable.

It was a stupid idea that one of the players came up with for their new character and our initial estimate was that it would turn a profit (as far as price of potatoes vs price of vodka). It was just the kind of stupid idea I thought would fit with Traveller.

As I said before, all the math and numbers is getting kinda crazy. I dont need that many details (which might mean I'm using the wrong rule system :confused:). I'll sit down tomorrow and figure out my numbers and post them here so everyone can tell me how unrealistic they are :p.


----

Edit: Here are the numbers I found again after about 30 min of googling (sources included)

Brewing
1 kg potato = 1 liter vodka (source semi-NSFW) http://www.mademan.com/mm/how-make-potato-vodka.html
so, 1 ton potato = .798 ton vodka (weight) -does not mater
1 dTon = 14 m3
1 dTon = 14,000 liter

so, need 14,000kg potato to make 1dTon of vodka

Potatoes, Whole, Unpeeled 641 kg/m3 http://go.key.net/rs/key/images/Bulk Density Averages 100630.pdf

641*14 = 8974 kg of potatoes per dTon

So, apx 1.5 dTon potatoes = 1 dTon of vodka
so, 3 : 2 ratio

Give it 4 weeks for distilling and ageing.

Growing
50 lbs potatoes per 2 lbs seed http://homeguides.sfgate.com/many-potatoes-one-plant-54215.html
25kg per 1 kg seed -crap estimate, rounding big time
but still, 25 : 1 ratio
Takes 70-80 days to grow, so 10 weeks http://www.connexionfrance.com/potatoes-grow-france-how-long-varieties-10748-news-article.html
Because FUTURE lets cut that by 25% so 7 weeks to grow.
 
Last edited:
It was a stupid idea that one of the players came up with for their new character and our initial estimate was that it would turn a profit (as far as price of potatoes vs price of vodka). It was just the kind of stupid idea I thought would fit with Traveller.

As I said before, all the math and numbers is getting kinda crazy. I dont need that many details (which might mean I'm using the wrong rule system :confused:). I'll sit down tomorrow and figure out my numbers and post them here so everyone can tell me how unrealistic they are :p.


----

Edit: Here are the numbers I found again after about 30 min of googling (sources included)

Brewing
1 kg potato = 1 liter vodka (source semi-NSFW) http://www.mademan.com/mm/how-make-potato-vodka.html
so, 1 ton potato = .798 ton vodka (weight) -does not mater
1 dTon = 14 m3
1 dTon = 14,000 liter

so, need 14,000kg potato to make 1dTon of vodka

Potatoes, Whole, Unpeeled 641 kg/m3 http://go.key.net/rs/key/images/Bulk Density Averages 100630.pdf

641*14 = 8974 kg of potatoes per dTon

So, apx 1.5 dTon potatoes = 1 dTon of vodka
so, 3 : 2 ratio

Give it 4 weeks for distilling and ageing.

Growing
50 lbs potatoes per 2 lbs seed http://homeguides.sfgate.com/many-potatoes-one-plant-54215.html
25kg per 1 kg seed -crap estimate, rounding big time
but still, 25 : 1 ratio
Takes 70-80 days to grow, so 10 weeks http://www.connexionfrance.com/potatoes-grow-france-how-long-varieties-10748-news-article.html
Because FUTURE lets cut that by 25% so 7 weeks to grow.

mine was 60 days for a dton of liquor so same ballpark
 
Ok, so I went through Merchant Prince and priced out some amounts of the raw materials for the brewing and growing and added some fudge factor for labor to make numbers nice and round.

----

Brewing

3dTon Potato + 1dTon vodka = 4dTon + 1dTon machinery = 5 dTon

Cost:
Microprocessor Assemblies = 1,400 1/10th ton
Piping and Attachment = 900 1/10th ton
Biodeisel/Cooking Compuunds = 5,000 1/10th ton
Misc Spices = 600 1/10th ton
High-Pressure/Temp resistant components = 15,000 6/10th ton
Total equipment: 22,900 1dTon
1dTon Starship Deckplate misc = 50,000
Add some labor cost.
Total Cost: 100k
Install Time: 2d6 days

Growing

25 : 1 ratio, product to seed

1 dTon production + 1 ton of gear, water/soil, lighting + 1 ton of recycling = 3 dTon

Cost:
Microprocessor Assemblies = 1,400 1/10th ton
Piping and Attachments = 900 1/10th ton
Growth Hormones = 2,500 1/10th ton
Basic Raw Materials = 1,500 3/10th ton
Starship Deckplates = 20,000 4/10th ton
Recycling = 50,000 1 ton
Total Equipment: 76,300
1/2dTon Deckplate misc = 25,000
Add some Labor cost.
Total Cost: 125k
Install Time: 3d6 days


To add automatic growing and harvesting
Pick Hydroponics skill level:
0: 1,000
1: 10,000
2: 100,000
1 ton of drones and maintenance gear = 300,000
 
Assuming it's a luxury consumable, Space Stations has simplified the basic process to twenty tons of equipment produces one ton of goods per day,
 
Back
Top