I apologise if this isn't the right place to post this.(adsbygoogle = window.adsbygoogle || []).push({});

If I was to calculate the escape velocity of a body, e.g. the earth which is approx. 11.2km/s, could this then be used as the delta-v in the ideal rocket equation to calculate the mass ratio needed?

This would be for both a trip to the moon and to Mars so it's not just LEO. That's why I presume the escape velocity is the delta-v in this case?

Also, If this was so and I could use it, for the equivalent nozzle exit velocity, would I have to add up the main engine and any boosters?

Thanks in advance

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Question on delta-v and escape velocity?

**Physics Forums | Science Articles, Homework Help, Discussion**