Vought-Sikorsky XR-4C at the Udvar-Hazy Center

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Vought-Sikorsky XR-4C at the Udvar-Hazy Center

The XR-4 served as the prototype for the world's first mass-produced helicopter.

Photographer:

Dane Penland

ID#:

WEB10835-2008

Source:

Smithsonian's National Air and Space Museum

Copyright:

Smithsonian Institution

Rights Usage:

Contact Smithsonian Institution

Terms of Use:

Smithsonian Terms of Use

For print or commercial use please see permissions information.

Photographer:

ID#:

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Copyright:

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