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Jummie Garba Week 5: February 15 th , 2007

Jummie Garba Week 5: February 15 th , 2007. Propulsion Group Electrical Propulsion System 1 & 2. EP Systems - Masses. The numbers on the chart are the m PL (mt) of each EP system. Garba - 1. Worked on with Courtney Rogge. EP Systems. I sp = 5000 s for all EP systems

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Jummie Garba Week 5: February 15 th , 2007

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  1. Jummie GarbaWeek 5: February 15th, 2007 Propulsion GroupElectrical Propulsion System 1 & 2

  2. EP Systems - Masses The numbers on the chart are the mPL (mt) of each EP system. Garba - 1 Worked on with Courtney Rogge

  3. EP Systems • Isp = 5000 s for all EP systems • Assuming constant acceleration (a0 = 1x10-7 km/s) • Some systems are going to be re-used. Garba - 2

  4. Backup - Equations • Initial mass to payload mass • Thrust to payload mass • Power Garba - 3

  5. Back up – Calculations of EP1 Garba - 4

  6. Back up – EP 1 Requirements • ∆V = 10 km/s • Initial Mass: 233.64 mt • Mass of Hardware: 28.64 mt • Propellant Mass: 43.11 mt • Thrust: 24.3 N • Power: 0.57 MW • Burn Time: 2.87 yrs Garba - 5

  7. Back up – EP 2 Requirements • ∆V = 10 km/s • Initial Mass: 377.70 mt • Mass of Hardware: 46.30 mt • Propellant Mass: 69.68 mt • Thrust: 37.8 N • Power: 0.93 MW • Burn Time: 2.87 yrs Garba - 6

  8. Back up – EP 3 Requirements • ∆V = 5.9 km/s • Initial Mass: 563.67 mt • Mass of Hardware: 69.10 mt • Propellant Mass: 63.90 mt • Thrust: 56.4 N • Power: 1.38 MW • Burn Time: 1.76 yrs Garba - 7

  9. Back up – EP 4 Requirements • ∆V = 10 km/s • Initial Mass: 490.65 mt • Mass of Hardware: 60.15 mt • Propellant Mass: 90.52 mt • Thrust: 49.1 N • Power: 1.20 MW • Burn Time: 2.87 yrs Garba - 8

  10. Back up – EP 5 Requirements • ∆V = 5.9 km/s • Initial Mass: 563.67 mt • Mass of Hardware: 69.10 mt • Propellant Mass: 63.90 mt • Thrust: 56.4 N • Power: 1.38 MW • Burn Time: 1.76 yrs Garba - 9

  11. Back up – EP 6 Requirements • ∆V = 10 km/s • Initial Mass: 137.02 mt • Mass of Hardware: 16.8 mt • Propellant Mass: 25.28 mt • Thrust: 13.7 N • Power: 0.34 MW • Burn Time: 2.87 yrs Garba - 10

  12. Back up – EP 7 Requirements • ∆V = 10 km/s • Initial Mass: 260.43 mt • Mass of Hardware: 31.92 mt • Propellant Mass: 52.34 mt • Thrust: 26.0 N • Power: 0.64 MW • Burn Time: 2.87 yrs Garba - 11

  13. Back up – EP 8 Requirements • ∆V = 10 km/s • Initial Mass: 153.45 mt • Mass of Hardware: 18.81 mt • Propellant Mass: 28.31 mt • Thrust: 15.3 N • Power: 0.38 MW • Burn Time: 2.87 yrs Garba - 12

  14. Back up – EP 9 Requirements • ∆V = 10 km/s • Initial Mass: 153.45 mt • Mass of Hardware: 18.81 mt • Propellant Mass: 28.31 mt • Thrust: 15.3 N • Power: 0.38 MW • Burn Time: 2.87 yrs Garba - 13

  15. References • 1Landau,Damon F., ”Strategies For the Sustained Human Exploration of Mars,” Chapter 7, pp 55, December 2006 Garba - 14

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