#KSP DELTA V MAP WINDOWS#

Because the delta-v needed to achieve the mission usually varies with the relative position of the gravitating bodies, launch windows are often calculated from porkchop plots that show delta- v plotted against the launch time. An atmosphere can be used to slow a spacecraft by aerobraking.Ī typical delta- v budget might enumerate various classes of maneuvers, delta- v per maneuver, and number of each maneuver required over the life of the mission, then simply sum the total delta- v, much like a typical financial budget. In the absence of an atmosphere, the delta- v is typically the same for changes in orbit in either direction in particular, gaining and losing speed cost an equal effort. Tables of the delta- v required to move between different space regime are useful in the conceptual planning of space missions. Delta- v is also additive, as contrasted to rocket burn time, the latter having greater effect later in the mission when more fuel has been used up. For example, although more fuel is needed to transfer a heavier communication satellite from low Earth orbit to geosynchronous orbit than for a lighter one, the delta- v required is the same.

As input to the Tsiolkovsky rocket equation, it determines how much propellant is required for a vehicle of given empty mass and propulsion system.ĭelta- v is a scalar quantity dependent only on the desired trajectory and not on the mass of the space vehicle. It is calculated as the sum of the delta-v required to perform each propulsive maneuver needed during the mission.

In astrodynamics and aerospace, a delta-v budget is an estimate of the total change in velocity ( delta- v) required for a space mission. Delta- v in feet per second, and fuel requirements for a typical Apollo Lunar Landing mission.

Ksp delta v map