'In 1939 this Russian took the 1st flight of a practical, single-rotor helicopter, & why not?  He built the thing!'
Igor Sikorsky
IN THE SKY: In 1939 this Russian took the 1st flight of a practical, single-rotor helicopter, & why not?  He built the thing!
In 1939 this Russian took the 1st flight of a practical, single-rotor helicopter, & why not?  He built the thing!
In 1939 this Russian took the 1st flight of a practical, single-rotor helicopter, & why not?  He built the thing!
IN THE SKY
Igor Sikorsky
IN THE SKY