Sikorsky R-4
From Wikimedia Commons, the free media repository
The Sikorsky R-4 is often recognized as being the first mass produced helicopter in the world.
 |
 |
 |
 |
 |
 |
 |
 |
 |
_-_GPN-2000-001729.jpg) |
Views
Personal tools
- This page was last modified on 16 April 2009, at 11:22.
- Text is available under the Creative Commons Attribution/Share-Alike License; additional terms may apply. See Terms of Use for details.
- Privacy policy
- About Wikimedia Commons
- Disclaimers