Spin—an_aggravated_stall_and_autorotation..JPG - Wikipedia

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Summary

Description	English: This is the work of a Government Agency. Although the FAA sells this book for about $17USD it is available, free of charge, at the URL above. The Federal Aviation Administration holds no copyright on this publication.
Source	http://www.faa.gov/library/manuals/aircraft/airplane_handbook/media/faa-h-8083-3a-3of7.pdf ^{[ dead link ]}
Author	FAA

Licensing

This image or file is a work of a Federal Aviation Administration employee, taken or made as part of that person's official duties. As a work of the U.S. federal government , the image is in the public domain in the United States.