Ever wondered how far Starship can go without refueling?


Calculations are made using current released Raptor 2 specs and Super Heavy and Starship estimations

Raptor 2

  • ISP SL: 327-347 s ISP 2.26Mn-2.53Mn
  • ISP Vac: 363-365 s ISP
  • 2260000 / 327 / 9.8 = 705kgs
  • 2530000 / 363 / 9.8 = 711kgs
  • Thrust: 230t
  • Weight: 1.6t

Starship Block 1, 50t Cargo to 200km LEO (RTLS)

1st Stage Super Heavy

  • Fuel: 3400t
  • Boostback and Landing Fuel: 600t
  • Residuals: 40t
  • Dry Mass: 275t
  • ISP: 337s ISP   327S + 347S / 2
  • Total Mass: 3675
  • DeltaV: 2613.58 m/s

2nd Stage Starship

  • Fuel: 1200t
  • Landing Fuel: 25t
  • Residuals: 12t
  • Dry Mass: 125t
  • ISP: 356 s ISP [1041 (3x347) + 1095 (3x365]
  • Mass at Stage Separation: 1375t
  • DeltaV: 6527.16 m/s

Totals

Total Mass at launch: 5050t

-------------------------------------------

 S1             S2

2613.58 + 6527.16 + 416 (26' inclination of Boca Chica) =  9556.74 m/s

-------------------------------------------


Starship Block 2, Raptor 2, 50t Cargo to 200km LEO (RTLS)

1st Stage Super Heavy

  • Fuel: 3650t
  • Boostback and Landing Fuel: 640t
  • Residuals: 40t
  • Dry Mass: 295t
  • ISP: 337s ISP   327S + 347S / 2
  • Total Mass: 3945
  • DeltaV: 2556.36 m/s

2nd Stage Starship

  • Fuel: 1500t
  • Landing Fuel: 25t
  • Residuals: 12t
  • Dry Mass: 125t
  • ISP: 356 s ISP [1041 (3x347) + 1095 (3x365)]
  • Mass at Stage Separation: 1375t
  • DeltaV: 6527 m/s

Totals

Total Mass at launch: 5050t

-------------------------------------------

 S1             S2

2556.36 dV + 6527 + 416 (26' inclination of Boca Chica) =  9499.36 m/s

-------------------------------------------




200t Cargo to LEO (Expended) 9256m/s 

1st Stage Super Heavy

  • Fuel: 3400t
  • Residuals: 40t
  • Dry Mass: 275t
  • ISP: 345s ISP   327 + 363 / 2
  • Take off weight 5200t
  • Weight at Stage sep 1840t
  • DeltaV: 3514.88 m/s

2nd Stage Starship

  • Fuel: 1200t
  • Residuals: 20t
  • Dry Mass: 125t
  • ISP: 364 s ISP 1089 (3x363) + 1095 (3x365) / 6
  • Weight at stage sep 1525t
  • Weight at MECO 360t
  • DeltaV: 5153.26 m/s

Total

-------------------------------------------

Total

-------------------------------------------

  S1         S2

3514.88 + 5153.26 + 460 = 9128 m/s
-------------------------------------------

20t Cargo to GTO (Expended) 11926m/s

1st Stage Super Heavy

  • Fuel: 3400t
  • Residuals: 68t
  • Dry Mass: 180t
  • ISP: 333.5 s ISP 327 + 340 / 2
  • DeltaV: 3726.5 m/s

2nd Stage Starship

  • Fuel: 1200t
  • Residuals: 20t
  • Dry Mass: 100t
  • ISP: 352.5 s ISP 1020 (3x340) + 1095(3x365) / 6
  • DeltaV: 7659 m/s

Total

-------------------------------------------

  S1         S2

3726.5 + 7659 + 460 = 11845 m/s

-------------------------------------------

0t Cargo to TLI (Expended) 12605m/s

1st Stage Super Heavy

  • Fuel: 3400t
  • Residuals: 68t
  • Dry Mass: 180t
  • ISP: 333.5 s ISP 327 + 340 / 2
  • DeltaV: 3701 m/s

2nd Stage Starship

  • Fuel: 1200t
  • Residuals: 20t
  • Dry Mass: 100t
  • ISP: 352.5 s ISP 1020 (3x340) + 1095(3x365) / 6
  • DeltaV: 8123 m/s

Total

-------------------------------------------

  S1         S2

3701 + 8123 + 460 = 12284 m/s

-------------------------------------------

300t Cargo to LEO (Expended) v3, Raptor 3, Extended Tanks, 10kn SH, 9 Engine SS, 11926m/s

1st Stage Super Heavy

  • Fuel: 3600t
  • Residuals: 72t
  • Dry Mass: 200t
  • ISP: 337 s ISP (330 + 345) / 2
  • DeltaV: 2854 m/s

2nd Stage Starship

  • Fuel: 1900t
  • Residuals: 38t
  • Dry Mass: 100t
  • ISP: 361 s ISP  ((6 x 370) + (3x345)) / 9
  • DeltaV: 5871 m/s

Total

-------------------------------------------

  S1         S2

2854 + 5871 + 460 = 9185 m/s

-------------------------------------------

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