Jan 13 1942
From The Space Library
Jump to:
navigation
,
search
Sikorsky XR-4, single-rotary wing, two-man helicopter, made its first successful flight.
Views
Page
Discussion
View source
History
Personal tools
3.145.75.238
Talk for this IP
Log in
Navigation
Main Page
Community portal
Recent changes
Random page
Help
Edit PayPal Items
Beta PDF Search
Search
Toolbox
What links here
Related changes
Upload file
Special pages
Printable version
Permanent link