Fuel mass as related to delta v

[fistfullofnails]

When calculating my fuel mass for the delta v equations, do i need to add the oxidizer mass together with the liquid fuel mass to get the fuel mass, or do i just go with the liquid fuel mass itself?

Edited May 21, 2015 by fistfullofnails

[adinfinitum]

Unless you're using nukes you do need to add in the mass of the oxidizer.

[zarakon]

Add them together. They are both 0.005 per unit

[n0xiety]

Instead of calculating it every time you can install either mechjeb or kerbal engineer mods to see the dV values. That being said you need both oxidizer + liquid fuel mass for the calculation.

[Chaos_Klaus]

Also, an easier way of getting dry and wet mass is looking at the total mass of a stage, then removing the fuel and looking at the total mass again.

Just as a precaution: Fuel tanks have a dry mass of their own. So make hure to count them in aswell.