Ram Jet Helicopter Rotor Development Open PDF Document Details Document Type Technical Report Publication Date Dec 15, 1950 Accession Number ADA800284 Entities People A. C. Ballauer Organizations McDonnell Aircraft Corporation Tags DTIC Thesaurus Topics Aircrafts Airframes Blade Tips Blades Combustion Chambers Diameters Engines Fatigue Tests (Mechanics) Frequency Government Procurement Helicopter Rotors Helicopters Jet Helicopter Rotors Missouri Resonant Frequency Test Sets Trailing Edges