What is contained in a Bridge?

[Straybow]

Yep. I spec'ed that out for my MgT House rules. I did it per stateroom considering two people and first class service (long showers, baths, Auto-chefs, etc). My staterooms totalled 6 tons for everything included.

1 ton for all LS needs per two people:

2,000 litres water (recycled throughout the trip)
6 cubic meters for atmosphere & water recyclers
2 cubic meters HVAC machinery
3 cubic meters for auto-chef & 1 cubic meter of proto-food/month

If all fresh food to be cooked, ~0.5 cubic meters per person for 2 weeks

According to the EPA, how many gallons the average American uses, per day:

• Toilet – 18.5 gallons per person, per day
• Washing Machine – 15 gallons per person, per day
• Shower – 11.6 gallons per person, per day
• Faucet – 10.9 gallons per person, per day
• Dishwasher – 1 gallon per person, per day

So, we don't have a washing machine on a starship, or if there is one it would be something different from 20th cen tech. There would be some washing for uniforms and service linens that they don't carry tons of extras, together with dishes. Starships don't use water to flush waste through a long pipe to the sewer branch, which greatly reduces that water usage. Also showering water and faucet usage would be restricted except for luxury accommodation.

Five gallons for each would be 20 gallons a day at most. Luxury adds 5 more gallons each showering and faucet and wash-up for crew service, to 35 gallons per day. That's about 130 liters a day, less than 1000 liters per passenger without recycling.

The air and water handling equipment you've described could probably handle a whole 100 dT ship. If you're making dedicated equipment for a single stateroom, it could be ¼ that size, maybe smaller given handwavey tech 3000 years in the future.

 

[Condottiere]

1. Sonic dishwasher

2. Disposable clothing

3. Vacuum toilet

4. Deodorant

5. Alcohol wipes

6. Fuel tanks

 

[Proneutron]

According to the EPA, how many gallons the average American uses, per day:

• Toilet – 18.5 gallons per person, per day
• Washing Machine – 15 gallons per person, per day
• Shower – 11.6 gallons per person, per day

• 
  
  Fascinating. However, my staterooms have soaking tubs that hold up to 500 liters. And recycling of water isn't instantaneous. Plus food is synthesized from super dense organic blocks that contain no water to speak of. Some even use part of cargo hold for swimming if enough High passage is sold. The EPA really doesn't do interstellar space travel well at all. :file_19:

 

[mike wightman]

A better source of data would be to look at the water management system of the ISS...

 

[Grav_Moped]

Fascinating. However, my staterooms have soaking tubs that hold up to 500 liters. And recycling of water isn't instantaneous. Plus food is synthesized from super dense organic blocks that contain no water to speak of. Some even use part of cargo hold for swimming if enough High passage is sold. The EPA really doesn't do interstellar space travel well at all. :file_19:

Looking at typical deck plans, OSHA might not do it very well either.

 

[Proneutron]

Looking at typical deck plans, OSHA might not do it very well either.

:rofl:

 

[Proneutron]

A better source of data would be to look at the water management system of the ISS...

Or the air quality management systems of the ISS... :ssb:

 

[BRover]

Somewhere upthread was a great small craft life support debate (bridge/couch cubeage or small craft cabin cubeage?). I was backing the Bridge/couch side, based on Book 5.

Today, I happened to look at Book 2 ('81 ed. p. 17), and, lo and behold, I cast mine eyes upon the following paragraph:

Fittings: The fittings table indicates items which may be allocated to small craft. Staterooms, low berths, and emergency low berths are the same as those used in larger ships. The small craft cabin is a small, one passenger stateroom for use on longer duration voyages. It can be used double occupancy in a pinch, but the crowding will increasingly affect the abilities of the crew to function as time passes. Couches are individual passenger seats; one is required for each passenger carried (if a stateroom or cabin is not provided). Each small craft except the fighter already has two small craft passenger couches installed (the fighter has one). Cargo and fuel tankage are simply allocated; one ton of cargo space carries one ton of cargo, while one ton of fuel tankage carries one ton of fuel. [emphasis added]

That parenthesis seems to indicate that a small craft cabin (2t) or stateroom (4t) includes life support, at least in 1981 CT.
:CoW: reopened!

 

[vegascat]

Laundrey

Laundry could be taken care of by Clamping each piece of laundry to a line and tossing the line out the airlock for a couple of hours. The vacuum should clear and debris cleaning most of the dirty laundry leaving the clothing mostly dirt and vermin free. Anything else could be taken care of by the steward.

 

[Grav_Moped]

Laundry could be taken care of by Clamping each piece of laundry to a line and tossing the line out the airlock for a couple of hours. The vacuum should clear and debris cleaning most of the dirty laundry leaving the clothing mostly dirt and vermin free. Anything else could be taken care of by the steward.

Ultrasonic grav washer, about the size of a medium suitcase. Put the dirty clothes in, close it up and press the button. It hums while it's cleaning, and goes "ping" when it's done. Advanced versions will also mend torn or worn clothing.

In the presence of video/holographic recording devices, they become invisible and people are mentally compelled to avoid discussing them -- a phenomenon they share with space toilets.

 

[Condottiere]

Three dee printers could provide a constant source of new underwear and socks.

Since socks become in constant quantum flux once they enter a washing machine.

 

[mike wightman]

Just throw them in the recycling hopper and use the ship's thing maker to manufacture new garments.

 

[Grav_Moped]

"You recycled my favorite shirt! I loved that shirt!"

 

[Grav_Moped]

But on-topic, I'm in the middle of drawing up a Type S Scout/Courier as a prolate spheroid tailsitter*, and the deck layout gives me a 13.5Td** space (the top 1.75 decks) for the bridge as such. This gives me the puzzle of where an additional 7.5Td (which may or may not include the computer) ought to go. Where it goes depends on what it is (ship's locker, airlock, radar/sensors, miscellaneous corridors, and so forth).

It wouldn't be a problem except that I want the floor of the lowest personnel deck to be at the "equator" of the spheroid, so that there's a bulkhead where structural considerations strongly suggest that a bulkhead ought to be***.

If the elements of bridge tonnage that aren't sensors or seats and their control panels get spread throughout the ship, that means less space above the equatorial bulkhead and more below it.





* Drew it up in 1986 under alternate design rules (houseruled by ref), now revising it to fit LBB2 '81. The original had two turrets, two computers, and 30-some-odd tons of cargo capacity. (No, I have no idea how that works either.) Ok, I do remember the turrets: it was one double turret by tonnage and cost, split up into two separate weapon mounts to provide 360-degree coverage. Seemed like a good idea at the time.

** The prolate spheroid hull form came out 10% oversized -- the dimensions are in clean fractional meters and getting exactly 1350m^3 would have required oddball numbers. Thus, 1Td from the build rules represents 1.1Td on the deck plans, more or less.

*** Taken literally, the equatorial bulkhead should have 45Td above it and 55Td below (the latter volume contains the 40Td fuel and 15Td drive bay), but I'll just say the drives and fuel are denser than the bridge and staterooms and toss in a bit of artistic license.