Flight Global Helicopter Special 1954

[kolibri282]

Special on helicopters starting here:
http://www.flightglobal.com/pdfarchive/view/1954/1954%20-%200663.html
Amongst other things there is Raoul Hafner's Bleriot lecture on helicopters here:
http://www.flightglobal.com/pdfarchive/view/1954/1954%20-%200687.html


Have Fun!

Juergen