There is a definite relationship between the Inert mass and the Propellant mass in a stage, exclusive of the Payload Mass, called Propellant Mass Fraction, Lp, which can be used to determine whether the guess for GLOW is good or bad.
There is a definite relationship between the Inert mass and the Propellant mass in a stage, exclusive of the Payload Mass, called Propellant Mass Fraction, Lp, which can be used to determine whether the guess for GLOW is good or bad.
Values of Wi, Wp generated for a
given GLOW can be checked
against a pre-assigned Lp.
Realistic Lp values are: 0.7 to 0.9