T5 Only: Life Support duration

[infojunky]

Ok Life support is rated in Person-Days. So when you run out of days do you run out of Life Support. Or should it be in the number of people supported?

As it is written it looks to be a permanate installation. Except for the rating...

 

[AnotherDilbert]

If we look back at T5.09, the default was 30 days (or 120 days for long-term), so a 300 person-day installation was for 10 people for 30 days.

I would guess we can squeeze a few extra days in a pinch, e.g. by rationing.

 

[infojunky]

If we look back at T5.09, the default was 30 days (or 120 days for long-term), so a 300 person-day installation was for 10 people for 30 days.

I would guess we can squeeze a few extra days in a pinch, e.g. by rationing.

From that it is basically a rehash of the Life Support rules from Beltstrike then.

 

[Spinward Flow]

From that it is basically a rehash of the Life Support rules from Beltstrike then.

Go figure, eh?

 

[AnotherDilbert]

From that it is basically a rehash of the Life Support rules from Beltstrike then.

While not very well defined, I don't really think so. At MCr 1 per Dton, it's presumably more machinery than just storage space for consumables.

As far as I can see it's the air scrubbers, the water recyclers, lighting systems, kitchenettes, pipes and cables, as well as storage for consumables (air, water, food).

B2, p31:
Provide Life Support To Its Occupants
Ships have installed systems that provide life support, including atmosphere, personal hygiene, food and drink, recreation, and living quarters.

B2, p50:
Operations. Some portion of the ship may be dedicat- ed to specialized activities in support of the ship’s mission: medical sections, data processing, resource processing, command and control, repair bays, or other mission responsibilities. Operations includes Life Support (equipment to maintain environment, atmosphere, liquids, and food).

But you do count capacity in person-days like Beltstrike, not in person-weeks like LBB2...

 

[Spinward Flow]

you do count capacity in person-days like Beltstrike, not in person-weeks like LBB2...

The context for LBB2 life support is basically tramp freighter jump cycles (1 week normal space, 1 week jump space) ... so 2 weeks of expenses starts looking an awful lot like overhead per jump.

Beltstrike isn't working on a jump/business cycle cadence. Asteroid prospecting works on a basis of 6 hour shift blocks (4 shifts per 24 hour day). So a more granular approach to life support makes sense ... hence person/days instead of occupant/2 weeks when it comes to bookkeeping the life support. Living on maneuver drive instead of jump drive makes a lot of difference with respect to the expected tempo of operations.

At MCr 1 per Dton

Beltstrike, p3 specifies life support reserves as being MCr0.15 per dton and giving you 150 person/weeks per dton of cargo space given over to life support consumables. This isn't just air/water/food. It's also parts and spares for the life support system to keep it functioning (so filters, scrubbers and other equipment).

Note that MCr0.15 for 150 person/weeks = MCr0.15 for 75x 2 week jump cycles of stateroom life support @ Cr2000 per 2 weeks per occupant.

 

[AnotherDilbert]

You are comparing two different things: T5 discuss ship construction, hence the machinery that performs life support; whereas Beltstrike discuss operations, hence the consumables used.