Kellett XR-8 helicopter hovering, in 1945 (240117-F-IO108-002).JPG
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:48, 13 October 2024 | 3,648 × 2,768 (4.45 MB) | wikimediacommons>Cobatfor | == {{int:filedesc}} == {{Information |Description={{en|1=A U.S. Army Air Force Kellett XR-8 helicopter hovering, in 1945. Developed as a prototype for the USAAF in 1940s, the Kellett XR-8 tested the idea of stabilizing a helicopter by using dual offset horizontal rotors to eliminate the need to power a tail rotor.}} |Source={{ID-USMil|240117-F-IO108-002|Air Force|url=https://www.nationalmuseum.af.mil/Upcoming/Photos/igphoto/2003377943/}} |Date={{ISOdate|1945}} |Author=U.S. Air Force |Permissi... |
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