Analysis of Accuracy of Gas-Filled Bellows for Sensing Gas Density Open PDF Document Details Document Type Technical Report Publication Date Feb 01, 1948 Accession Number ADA800780 Entities People Edward W. Otto Organizations Glenn Research Center Tags DTIC Thesaurus Topics Accuracy Aeronautics Air Flow Assembly Calibration Displacement Elements Equations Errors Flight Instruments Gas Laws Gas Turbines Nitrogen Pitot Tubes Polyethylenes Turbines