Theory of Self-Excited Mechanical Oscillations of Hinged Rotor Blades Open PDF Document Details Document Type Technical Report Publication Date Jul 01, 1943 Accession Number ADA800950 Entities People Robert P. Coleman Organizations Langley Research Center Tags Communities of Interest Air Platforms DTIC Thesaurus Topics Aeronautical Laboratories Aeronautics Aircrafts Coordinate Systems Deflection Equations Frequency Helicopter Rotors Lepidoptera Mechanical Waves Oscillation Resonant Frequency Rotation Vibration Waves