Difference between revisions of "Mass Allocations for Mars Direct"

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===ERV (Earth Return Vehicle)===
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==ERV (Earth Return Vehicle)==
  
 
{|
 
{|
Line 116: Line 116:
 
! Total Mass
 
! Total Mass
 
! align=right | 28.6 mt
 
! align=right | 28.6 mt
 +
|}
 +
 +
==Consumables==
 +
 +
{|
 +
|+Consumable Requirements for Mars Direct Mission with Crew of Four
 +
! Item !! Oxygen !! Dry-food !! Whole-food !! Potable-water !! Wash-water !! Total
 +
|-
 +
| Need/man-day
 +
| align=right | 1.0
 +
| align=right | 0.5
 +
| align=right | 1.0
 +
| align=right | 4.0
 +
| align=right | 26.0
 +
! align=right | 32.5
 +
|-
 +
| Fraction recycled (kg)
 +
| align=right | 0.8
 +
| align=right | 0.0
 +
| align=right | 0.0
 +
| align=right | 0.8
 +
| align=right | 0.9
 +
! align=right | 0.87
 +
|-
 +
| Wasted/man-day
 +
| align=right | 0.2
 +
| align=right | 0.5
 +
| align=right | 1.0
 +
| align=right | 0.0
 +
| align=right | 2.6
 +
! align=right | 4.3
 +
|-
 +
| ERV Reqs 200 days in (kg)
 +
| align=right | 160
 +
| align=right | 400
 +
| align=right | 800
 +
| align=right | 0
 +
| align=right | 2080
 +
! align=right | 3440
 +
|-
 +
| Hab Reqs 200 days out (kg)
 +
| align=right | 160
 +
| align=right | 400
 +
| align=right | 800
 +
| align=right | 0
 +
| align=right | 2080
 +
! align=right | 3440
 +
|-
 +
| Hab Reqs 600 days surface (kg)
 +
| align=right | 0
 +
| align=right | 1200
 +
| align=right | 2400
 +
| align=right | 0
 +
| align=right | 0
 +
! align=right | 3600
 +
|-
 +
| Hab Reqs Total (kg)
 +
| align=right | 160
 +
| align=right | 1600
 +
| align=right | 3200
 +
| align=right | 0
 +
| align=right | 2080
 +
! align=right | 7400
 
|}
 
|}
  
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**ERV cabin structure:  tonnes
 
**ERV cabin structure:  tonnes
 
**Life support System:  tonnes
 
**Life support System:  tonnes
−
**[[Consumables]]:  tonnes
+
**[[ERV consumables in Mars Direct|Consumables]]:  tonnes
 
**Electrical Power (5 kWe Solar)  tonnes
 
**Electrical Power (5 kWe Solar)  tonnes
 
**Reaction Control System:  tonnes
 
**Reaction Control System:  tonnes

Latest revision as of 10:58, 20 March 2010

On page 92 and 93 of Zubrin's book, The Case For Mars, he gives specific mass estimates for each component of his proposed Mars Direct Mission. These figures are widely disputed, and are given together as a whole here.

Figures Suggested by Zubrin

Hab (Habitation Module)

Habitation Module
Component Mass
Hab structure 5.0 mt
Life-support system 3.0 mt
Consumables 7.0 mt
Electric power (5 kWe solar) 1.0 mt
Reaction control system 0.5 mt
Comm. and Info. Mgmt. 0.2 mt
Lab equipment 0.5 mt
Crew (4) 0.4 mt
EVA Suits (4) 0.4 mt
Furniture and interior 1.0 mt
Open rovers (2) 0.8 mt
Pressurized rover 1.4 mt
Field science equipment 0.5 mt
Spares and margin (16%) 3.5 mt
Total Mass 25.2 mt

ERV (Earth Return Vehicle)

Earth Return Vehicle
Component Mass
ERV cabin structure 3.0 mt
Life support system 1.0 mt
Consumables 3.4 mt
Electrical power (5 kWe solar) 1.0 mt
Reaction control systems 0.5 mt
Comm. and Info. Mgmt. 0.1 mt
Furniture and interior 0.5 mt
EVA suits (4) 0.4 mt
Spares and margin (16%) 1.6 mt
ERV cabin total 11.5 mt
Aeroshell 1.8 mt
Light truck 0.5 mt
Hydrogen feedstock 6.3 mt
ERV propulsion stages 4.5 mt
Propellant production plant 0.5 mt
Power reactor (80 kWe) 3.5 mt
Total Mass 28.6 mt

Consumables

Consumable Requirements for Mars Direct Mission with Crew of Four
Item Oxygen Dry-food Whole-food Potable-water Wash-water Total
Need/man-day 1.0 0.5 1.0 4.0 26.0 32.5
Fraction recycled (kg) 0.8 0.0 0.0 0.8 0.9 0.87
Wasted/man-day 0.2 0.5 1.0 0.0 2.6 4.3
ERV Reqs 200 days in (kg) 160 400 800 0 2080 3440
Hab Reqs 200 days out (kg) 160 400 800 0 2080 3440
Hab Reqs 600 days surface (kg) 0 1200 2400 0 0 3600
Hab Reqs Total (kg) 160 1600 3200 0 2080 7400

Figures Estimated as a part of the Tsiolkovsky Compendium Project

Note that if these are empty, it means that they have yet to be addressed by Tracers or final estimated masses determined. All items should have not only the estimated mass, but also what this mass is compared to the masses suggested by Zubrin and reproduced above.

Hab

Total Mass: Tonnes

  • Hab Structure: Tonnes
  • Life Support System: Tonnes
  • Consumables: Tonnes consisting of:
    • Oxygen: kg total ( kg/man*day at % reuse)
    • Dry Food: kg total ( kg/man*day at % reuse)
    • Whole Food: kg total ( kg/man*day at % reuse)
    • Potable Water: kg total ( kg/man*day at % reuse)
    • Wash Water: kg total ( kg/man*day at % reuse)
  • Electric Power (5 kWe solar): tonnes
  • Reaction Control System: tonnes
  • Communications and information management: tonnes
  • Lab Equipment: tonnes
  • Crew: tonnes
  • EVA Suits (4): tonnes
  • Furniture and Interior: tonnes
  • Open Rovers (2): tonnes
  • Pressurized Rover: tonnes
  • Field Science Equipment: tonnes
  • Spares and Margin (%): tonnes

ERV (Earth Return Vehicle)

Total Mass: Tonnes

  • ERV Cabin Total: Tonnes
    • ERV cabin structure: tonnes
    • Life support System: tonnes
    • Consumables: tonnes
    • Electrical Power (5 kWe Solar) tonnes
    • Reaction Control System: tonnes
    • Communications and Information Management: tonne
    • Furniture and Interior: tonnes
    • EVA suits (4): tonnes
    • Spares and Margin (%): tonnes
  • Aeroshell: tonnes
  • Light Truck: Tonnes
  • Hydrogen Feedstock: Tonnes
  • ERV Propulsion Stages: tonnes
  • Propellant Production Plant: tonnes
  • Power Reactor (80 kWe): tonnes
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