Advanced Blade Concept (ABC) demonstrator developed by Sikorsky Aircraft, under U.S. Army and NASA funding. From Vertiflite, July/August 1975.

Sikorsky S-69

203 views
0

Advanced Blade Concept (ABC) demonstrator developed by Sikorsky Aircraft, under U.S. Army and NASA funding. From Vertiflite, July/August 1975.

Image source

 

Uploaded to 2 years ago

 

License: Creative Commons Attribution-ShareAlike

 

In this album