Difference between revisions of "Mass Allocations for Mars Direct"

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=Figures Suggested by Zubrin=
 
=Figures Suggested by Zubrin=
−
==Hab==
+
==Hab (Habitation Module)==
  
−
Total Mass: 25.2 Tonnes
+
{|
−
*Hab Structure: 5.0 Tonnes
+
|+Habitation Module
−
*Life Support System: 3.0 Tonnes
+
! Component !! Mass
−
*Consumables: 7.0 Tonnes consisting of (TCFM page 92):
+
|-
−
**Oxygen: 160 kg total (1 kg/man*day at 80% reuse)
+
| Hab structure
−
**Dry Food: 1600 kg total (.5 kg/man*day at 0% reuse)
+
| align=right | 5.0 mt
−
**Whole Food: 3200 kg total (1 kg/man*day at 0% reuse)
+
|-
−
**Potable Water: 0 kg total [?] (4 kg/man*day at 80% reuse)
+
| Life-support system
−
**Wash Water: 2080 kg total (26 kg/man*day at 90% reuse)
+
| align=right | 3.0 mt
−
*Electric Power (5 kWe solar): 1 tonne
+
|-
−
*Reaction Control System: .5 tonnes
+
| Consumables
−
*Communications and information management: .2 tonnes
+
| align=right | 7.0 mt
−
*Lab Equipment: .5 tonnes
+
|-
−
*Crew: .4 tonnes
+
| Electric power (5 kWe solar)
−
*EVA Suits (4): .4 tonnes
+
| align=right | 1.0 mt
−
*Furniture and Interior: 1 tonne
+
|-
−
*Open Rovers (2): .8 tonnes
+
| Reaction control system
−
*Pressurized Rover: 1.4 tonnes
+
| align=right | 0.5 mt
−
*Field Science Equipment: .5 tonnes
+
|-
−
*Spares and Margin (16%): 3.5 tonnes
+
| Comm. and Info. Mgmt.
 +
| align=right | 0.2 mt
 +
|-
 +
| Lab equipment
 +
| align=right | 0.5 mt
 +
|-
 +
| Crew (4)
 +
| align=right | 0.4 mt
 +
|-
 +
| EVA Suits (4)
 +
| align=right | 0.4 mt
 +
|-
 +
| Furniture and interior
 +
| align=right | 1.0 mt
 +
|-
 +
| Open rovers (2)
 +
| align=right | 0.8 mt
 +
|-
 +
| Pressurized rover
 +
| align=right | 1.4 mt
 +
|-
 +
| Field science equipment
 +
| align=right | 0.5 mt
 +
|-
 +
| Spares and margin (16%)
 +
| align=right | 3.5 mt
 +
|-
 +
|
 +
|
 +
|-
 +
! Total Mass
 +
! align=right | 25.2 mt
 +
|}
  
 
==ERV (Earth Return Vehicle)==
 
==ERV (Earth Return Vehicle)==
  
−
Total Mass: 28.6 Tonnes
+
{|
−
*ERV Cabin Total: 11.5 Tonnes
+
|+Earth Return Vehicle
−
**ERV cabin structure: 3.0 tonnes
+
! Component !! Mass
−
**Life support System: 1.0 tonnes
+
|-
−
**Consumables: 3.4 tonnes
+
| ERV cabin structure
−
**Electrical Power (5 kWe Solar) 1.0 tonnes
+
| align=right | 3.0 mt
−
**Reaction Control System: .5 tonnes
+
|-
−
**Communications and Information Management: .1 tonne
+
| Life support system
−
**Furniture and Interior: .5 tonnes
+
| align=right | 1.0 mt
−
**EVA suits (4): .4 tonnes
+
|-
−
**Spares and Margin (16%): 1.6 tonnes
+
| Consumables
−
*Aeroshell: 1.8 tonnes
+
| align=right | 3.4 mt
−
*Light Truck: .5 Tonnes
+
|-
−
*Hydrogen Feedstock: 6.3 Tonnes
+
| Electrical power (5 kWe solar)
−
*ERV Propulsion Stages: 4.5 tonnes
+
| align=right | 1.0 mt
−
*Propellant Production Plant: .5 tonnes
+
|-
−
*Power Reactor (80 kWe): 3.5 tonnes
+
| Reaction control systems
 +
| align=right | 0.5 mt
 +
|-
 +
| Comm. and Info. Mgmt.
 +
| align=right | 0.1 mt
 +
|-
 +
| Furniture and interior
 +
| align=right | 0.5 mt
 +
|-
 +
| EVA suits (4)
 +
| align=right | 0.4 mt
 +
|-
 +
| Spares and margin (16%)
 +
| align=right | 1.6 mt
 +
|-
 +
! ERV cabin total
 +
! align=right | 11.5 mt
 +
|-
 +
| Aeroshell
 +
| align=right | 1.8 mt
 +
|-
 +
| Light truck
 +
| align=right | 0.5 mt
 +
|-
 +
| Hydrogen feedstock
 +
| align=right | 6.3 mt
 +
|-
 +
| ERV propulsion stages
 +
| align=right | 4.5 mt
 +
|-
 +
| Propellant production plant
 +
| align=right | 0.5 mt
 +
|-
 +
| Power reactor (80 kWe)
 +
| align=right | 3.5 mt
 +
|-
 +
|
 +
|
 +
|-
 +
! Total Mass
 +
! 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
 +
|}
  
 
=Figures Estimated as a part of the Tsiolkovsky Compendium Project=
 
=Figures Estimated as a part of the Tsiolkovsky Compendium Project=
Line 54: Line 190:
 
*Hab Structure: Tonnes
 
*Hab Structure: Tonnes
 
*Life Support System: Tonnes
 
*Life Support System: Tonnes
−
*Consumables:  Tonnes consisting of:
+
*[[Consumable Masses in Mars Direct|Consumables]]:  Tonnes consisting of:
 
**Oxygen:  kg total ( kg/man*day at % reuse)
 
**Oxygen:  kg total ( kg/man*day at % reuse)
 
**Dry Food:  kg total ( kg/man*day at % reuse)
 
**Dry Food:  kg total ( kg/man*day at % reuse)
−
**Whole Food:  kg total (1 kg/man*day at % reuse)
+
**Whole Food:  kg total ( kg/man*day at % reuse)
 
**Potable Water:  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)
 
**Wash Water:  kg total ( kg/man*day at % reuse)
−
*Electric Power (5 kWe solar):  tonne
+
*Electric Power (5 kWe solar):  tonnes
 
*Reaction Control System:  tonnes
 
*Reaction Control System:  tonnes
 
*Communications and information management:  tonnes
 
*Communications and information management:  tonnes
Line 66: Line 202:
 
*Crew:  tonnes
 
*Crew:  tonnes
 
*EVA Suits (4):  tonnes
 
*EVA Suits (4):  tonnes
−
*Furniture and Interior:  tonne
+
*Furniture and Interior:  tonnes
 
*Open Rovers (2):  tonnes
 
*Open Rovers (2):  tonnes
 
*Pressurized Rover:  tonnes
 
*Pressurized Rover:  tonnes
Line 78: Line 214:
 
**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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