High altitude evaluation of the Bell 47G-3B Helicopter Open PDF Document Details Document Type Technical Report Publication Date Nov 24, 1961 Accession Number AD0280233 Tags Communities of Interest Air Platforms Weapons Technologies DTIC Thesaurus Topics Aerodynamic Configurations Aircraft Equipment Aircrafts Airframes Altitude Army Aviation Communication Equipment Engines Fuel Pumps Government Procurement Ground Effect Helicopters High Altitude Landing Gear Procurement Sea Level United States