Propellant mass fraction
In aerospace engineering, the propellant mass fraction is the portion of a vehicle’s mass which does not reach the destination, usually used as a measure of the vehicle’s performance. In other words, the propellant mass fraction is the ratio between the propellant mass and the initial mass of the vehicle. In a spacecraft, the destination is usually an orbit, while for aircraft it is their landing location. A higher mass fraction represents less weight in a design. Another related measure is the payload fraction, which is the fraction of initial weight that is payload.It can be applied to a vehicle, a stage of a Vehicle or to a Rocket Propulsion System.
The propellant mass fraction is given by the formula shown here.Related formulas
|ζ||propellant mass fraction (dimensionless)|
|mf||final mass of the vehicle (kg)|
|m0||initial mass of the vehicle (kg)|