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Results tagged with delta-v
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user 26
Literal meaning is "change in velocity". The quantity has utility in rocketry as measure of the change in velocity that a reaction engine must produce to move into a given trajectory. The rocket equation establishes that the mass ratio of payload to initial mass is an exponential function of delta-v divided by the propellant velocity.
19
votes
Accepted
Calculating solar system escape and and sun-dive delta V from lower Earth orbit
One thing you're missing seems to be Oberth's effect. To go from LEO to solar system escape velocity, you have to counter Earth's escape velocity, but after that, you get an additional multiplier by …
- 16.4k
3
votes
Minimum Delta V to a staging area in cislunar space for a vertical space gun
I think there's a simplistic way to constrain this problem. Just apply simple conservation of angular momentum. Take the moon out of the picture entirely and just focus on the rise from the surface …
- 16.4k
4
votes
1
answer
779
views
Is an orbital launch more like a vertical climb or a Hohmann Transfer?
It is said that a launch to orbit requires a Delta V of 9.3–10 km/s, and this encompasses orbital speed, air drag, gravity drag, and the energy to raise altitude to low Earth orbit. But I'm troubled …
- 16.4k
16
votes
2
answers
12k
views
How to calculate Delta V for lunar flyby
As I understand the idea of a lunar flyby, you can pass a spacecraft by the far side of the moon without having to burn fuel to decrease your momentum and get to LLO (Low Lunar Orbit). But it seems l …
- 16.4k
6
votes
1
answer
1k
views
Minimum Delta V to a staging area in cislunar space for a vertical space gun
Space guns have a lot of confounding factors for getting to LEO. The projectile must be a rocket capable of large delta v in order to circularize the orbit. Then, giving more sideways velocity requi …
- 16.4k
24
votes
Accepted
Delta-V chart mathematics
This is a large question, but we can certainly boil it down. You need several levels of requisite knowledge. I'll break it down as so:
Relevance of Delta v for propellent budget
Conversion between …
- 16.4k