[Spaceships] Homebrew: Alternate Chemical Rocket Fuel

[Agemegos]

Originally Posted by DaltonS

From the classic rocket equation ΔV = Isp × g × ln(Mp/Me)

For the record: that's the US version of the Rocket Equation, in which specific impulse is given in seconds owing to an error with units, and has to be multiplied by g₀ before it can be used. The classic rocket equation as derived by Tsiolkovsky and used by everyone who is not stuck in a unit system in which "pounds" might be mass or might be force, is:

Δv = v(exhaust) × ln(Mp/Me)

Specific impulse is equal to effective exhaust velocity. Impulse is in units of force-times-time; divide by mass and you get units of velocity, not units of time.