Ram Jet Helicopter Rotor Development Open PDF Document Details Document Type Technical Report Publication Date May 15, 1950 Accession Number ADA800504 Entities People A. C. Ballauer Organizations McDonnell Aircraft Corporation Tags DTIC Thesaurus Topics Air Force Aircraft Equipment Aircrafts Airframes Autorotation Blades Diameters Government Procurement Helicopter Rotors Helicopters Jet Helicopter Rotors Missouri Photographs Propulsion Systems Rotary Wing Aircraft Test Sets Test Stands