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            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. 
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           | 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). 
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         Licensing 
        
         
          | Public domainPublic domainfalsefalse | 
         
        
        
         
              | 
          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. 
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          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}}. | 
         
        
        
       
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