File:PropulsiveEfficiency.GIF

This is a file from the Wikimedia Commons. Information from its description page there is shown below.
Commons is a freely licensed media file repository. You can help.

Description	Rocket propulsive efficiency as a function of vehicle speed divided by effective exhaust speed
Date	2007-02-11 (first version); 2007-02-11 (last version)
Source	Originally from en.wikipedia; description page is/was here.
Author	Original uploader was Wolfkeeper at en.wikipedia
Permission ( Reusing this file)	Released into the public domain (by the author).

Licensing

This work has been released into the public domain by its author, Wolfkeeper at the wikipedia project. This applies worldwide.

In case this is not legally possible:
Wolfkeeper grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.

This graph image could be recreated using vector graphics as an SVG file. This has several advantages; see Commons:Media for cleanup for more information. If an SVG form of this image is already available, please upload it. After uploading an SVG, replace this template with {{ vector version available|new image name.svg}}.

A background to Schools Wikipedia

SOS Children's Villages aims to make Wikipedia suitable for young learners. More than 2 million people benefit from the global charity work of SOS Children's Villages, and our work in 133 countries around the world is vital to ensuring a better future for vulnerable children. Sponsoring a child is a great way to help children who need your support.