{"version":"1.0","type":"rich","provider_name":"EbookNetworking","provider_url":"https://www.ebooknetworking.net","title":"Theory of self-excited mechanical oscillations of helicopter rotors with hinged blades (Report / National Advisory Committee for Aeronautics)","author_name":"Robert F Coleman","thumbnail_url":"https://www.ebooknetworking.net/books/B00/07I/bigB0007I3X04.jpg","thumbnail_width":330,"thumbnail_height":500,"html":"<a href=\"https://www.ebooknetworking.net/books_detail-B0007I3X04.html\">Theory of self-excited mechanical oscillations of helicopter rotors with hinged blades (Report / National Advisory Committee for Aeronautics)</a>","width":400,"height":300}