TRANSPORT HELICOPTER OPERATING COST ANALYSIS METHODS Open PDF Document Details Document Type Technical Report Publication Date Nov 30, 1955 Accession Number AD0086188 Tags Communities of Interest Air Platforms DTIC Thesaurus Topics Aircraft Equipment Aircraft Industry Aircrafts Airframes Cost Analysis Engineers Fatigue Life Flight Crews Gas Turbines Government Procurement Helicopters Maintenance Costs Military Operations Organizational Structure Ramjet Engines Turbines Turbojet Engines