---
title: Delta-V
url: 'https://demo.getgrav.org/typhoon/rockets/physics/delta-v'
markdown: 'https://demo.getgrav.org/typhoon/rockets/physics/delta-v.md'
date: '2020-12-14'
description: 'Delta-V The delta-v capacity of a rocket is the theoretical total change in velocity that a rocket can achieve without any external interference (without air drag or gravity or other forces). When detlta-v is constant, the delta-v that a rocket vehicle can provide can be calculated from the Tsiolko…'
---

# Delta-V

The delta-v capacity of a rocket is the theoretical total change in velocity that a rocket can achieve without any external interference (without air drag or gravity or other forces).

When detlta-v is constant, the delta-v that a rocket vehicle can provide can be calculated from the Tsiolkovsky rocket equation:\[63\]

```
{\displaystyle \Delta v\ =v_{e}\ln {\frac {m_{0}}{m_{1}}}}\Delta v\ =v_{e}\ln {\frac {m_{0}}{m_{1}}}}
```

The required delta-v can also be calculated for a particular manoeuvre; for example the delta-v to launch from the surface of the Earth to Low earth orbit is about 9.7 km/s, which leaves the vehicle with a sideways speed of about 7.8 km/s at an altitude of around 200 km. In this manoeuvre about 1.9 km/s is lost in air drag, gravity drag and gaining altitude.

---

## Navigation

- Parent: [Rocket Physics](https://demo.getgrav.org/typhoon/rockets/physics.md)
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