Delta-V

The maximum change of velocity of the vehicle, Δ v (with no external forces acting) is: delta v equals Eye SP times gee-naught times lon of mass-zero over mass-final Delta-v (literally "change in velocity"), symbolised as Δv and pronounced delta-vee, as used in spacecraft flight dynamics, is a measure of the impulse that is needed to perform a maneuver such as launching from, or landing on a planet or moon, or an in-space orbital maneuver. It is a scalar that has the units of speed. As used in this context, it is not the same as the physical change in velocity of the vehicle. The maximum change of velocity of the vehicle, Δ v (with no external forces acting) is: delta v equals Eye SP times gee-naught times lon of mass-zero over mass-final The classical rocket equation, a mathematical equation that describes the motion of vehicles that follow the basic principle of a rocket: a device that can apply acceleration to itself using thrust by expelling part of its mass with high velocity can thereby move due to the conservation of momentum. The maximum change of velocity of the vehicle, Δ v (with no external forces acting) is: delta vee equals Eye SP times gee-naught times lon of mass-zero over mass-final