Propellant Mass Fraction
Calculate the propellant mass fraction (PMF), a key performance metric for rockets and spacecraft, based on initial (wet) and final (dry) mass.
Propellant mass fraction
0.800
80.0% of wet mass
Dry mass fraction
0.200
20.0% of wet mass
Initial mass
10,000.0 kg
wet mass before burn
Propellant mass
8,000.0 kg
2,000.0 kg dry mass
How much of the vehicle is propellant?
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