Silverbird Astronautics

Launch Vehicle Performance Calculator

Propulsion link Analysis link Trajectory link Launcher link

This utility performs an approximate calculation of launch vehicle payload performance from any launch site to any orbit. The methodology used is described here. Blame, credit, and/or comments to John Schilling.

Disclaimer: This is an estimate only, and should not be used for detailed mission planning. For exact performance, please contact the launch service provider.

And yes, Javascript is most definitely required.

Launch Vehicle:
Launch Vehicle Family:
Launch Vehicle Family:
Launch Vehicle Family:
Number of Stages:  
Strap-on Boosters?      # Boosters
Booster 1st Stage 2nd Stage 3rd Stage
Dry Mass, kg
Propellant, kg
Thrust, kN
Isp, seconds
Residuals, %
Default Propellant Residuals?
Restartable Upper Stage?
Paload Fairing:   Mass, kg   Jettison, s

Note: user-defined launch vehicles limited to simple 3-stage configurations. Most operational constraints are not supported. For more detailed modeling of new launch vehicles, please contact us.

Launch Vehicle Model:
Payload Type:
Core Stage Type:
Payload Module Type:
Payload Fairing Type:
Upper Stage Type:
First Stage Engine Type:
Booster Recovery Mode:
Number of SRBs:
Upper Stage Type:
Payload Fairing Type:
Orbit Insertion Stage:
Solid Motor Type:
Number of SRBs:
Booster Type:
First Stage Recovery:
High Energy Stage:
First Stage Engine Type:
Core Recovery Mode:
Payload Fairing Type:
External Tank Type:
Earth Departure Stage:
Booster Type:
Upper Stage Type:
Cryogenic Upper Stage:
Multi-Payload Adapter:
Upper Stage Type:
Payload Fairing Type:
Orbit Insertion Stage:

Atlas V nomenclature:
  1st digit = 400 or 500 series
  2nd digit = number of solid boosters
  3rd digit = single or double-engine Centaur
Atlas V Heavy not yet available
Double-Engine Centaur availability uncertain
Atlas V extended mission kit implemented as required

Delta II nomenclature:
  1st digit = 6000 or 7000 series (6000 series obsolete)
  2nd digit = number of solid boosters
  4th digit = kick motor (5: Star-48B,   6: Star-37FM)
  'H' suffix = GEM-46 SRBs

Delta IV M+ nomenclature:
  1st digit = upper stage diameter, m   2nd digit = number of SRBs
Delta IV extended mission kit implemented as required

Minotaur-C nomenclature:
  Formerly known as Taurus
  1st digit = SSLV, Commerical, or XL series (SSLV obsolete)
  2nd digit = fairing (1: 63-in,   2: 92-in)
  3rd digit = 3rd stage (1: Orion 38,   3: Star 37)
  4th digit = 4th stage (0: None,   3: Star 37)

H-IIA nomenclature:
  1st digit = number of core stages
  2nd digit = number of liquid boosters
  3rd digit = number of SRB-A solid boosters
  4th digit = number of SSB solid boosters

Note: Upper stage not recommended for Low Earth Orbit missions

Commercial Soyuz nomenclature:
  Starsem 'Soyuz ST' = Soyuz FG or Soyuz 2-1A
  Starsem 'Soyuz ST+' = Soyuz 2-1B
  Starsem 'Soyuz 1' = Soyuz 2-1v

Commercial Zenit nomenclature:
  'Sea Launch' = Zenit 3SL
  'Land Launch' = Zenit 2SLB or Zenit 3SLB

Ariane 4 nomenclature:
  1st digit = family designation
  2nd digit = number of strap-on boosters
  suffix = booster type (P: solid,   L: liquid,   LP: both)

Falcon 9 nomenclature:
  Block 1 is retired
  Block 2 also known as "v1.1" or "Falcon 9R", retired
  Block 3 also known as "v1.2" or "Full Thrust", retired
  Block 4 is probably retired
  Delta-V mission kit may no longer be offered

Falcon Heavy:
  Booster launch site recovery preferred
  Core ocean recovery preferred
  Long payload fairing is standard
  Booster crossfeed no longer being developed

SLS Configurations:
  Block 1 Core: 4 RS-25E engines
  Block 1A & 2: 4 RS-25D engines
  iCPS: Interim Cryo Propulsion Stage, 1 RL-10 Engine
  LUS: Large Upper Stage, 4 RL-10 Engines
  EDS: Earth Departure Stage, 2 J-2X Engines
  FSB: Shuttle-Derived Five-Segment Booster
  ASB: Advanced Solid Booster
  LHB: Liquid Hydrocarbon Booster

Safir probably retired
Safir B used in current launches
Safir Block II is proposed upgrade w/2 solid boosters & kick stage
Extremely limited engineering data available on this vehicle

KSLV-1 assumed to use downrated Angara 1st stage and KSR-1 upper stage

Extremely limited engineering data available on this vehicle

Antares nomenclature:
  1st digit = 1st stage engine (NK-33 or RD-181)
  2nd digit = 2nd stage motor (Castor 30A, Castor 30B, or Castor 30XL)
  3rd digit = upper stage type(None, Bipropellant, or Star 48BV)
'Antares' formerly known as 'Taurus II'

CZ-5 Nomenclature: CZ-xxx or CZ-5-xxx
  1st digit = nominal core diameter, meters
  2nd digit = number of 2-meter strap-on boosters
  3rd digit = number of 3-meter strap-on boosters
  /HO suffix = optional cryogenic upper stage
  Yuanzgeng transfer stages used for MEO & GEO direct insertion

Vulcan nomenclature:
  1st digit = nominal fairing diameter
  2nd digit = number of solid boosters
  3rd digit = upper stage type (0: Centaur x: ACES)
Centaur extended mission kit implemented as required
Baseline configuration uses GEM-63 solid motors and BE-4 core engine

Launch Site:
Site Name:
Site Name:
Latitude, deg:
  Minimum Azimuth, deg:
  Maximum Azimuth, deg:

Apogee, km       Hyperbolic C3, km2/s2
Perigee, km Perigee, km
Inclination, deg Declination, deg

Note: Perigee altitudes <100 km not recommended

Shutdown Mode:    

Note: May require up to one minute for complex missions

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