The Firestone XR-9 also known by the company designation Model 45 was a 1940s American experimental helicopter built by the Firestone Aircraft Company for the United States Army Air Forces. Only two (the military XR-9B and one civil example) were built.
This page contains content from the copyrighted Wikipedia article "Firestone XR-9"; that content is used under the GNU Free Documentation License (GFDL). You may redistribute it, verbatim or modified, providing that you comply with the terms of the GFDL.