Tests of aerodynamically heated multiweb wing structures in a free jet at mach number 2: five aluminum-alloy models of 20-inch chord with 0.064-inch-thick skin, 0.025-inch-thick webs, and various chordwise stiffening at 2° angle of attack
National Aeronautics and Space Administration, 1960 - Technology & Engineering - 33 pages
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20-Inch Chord Aerodynamically Heated Multiweb Aluminum-Alloy Models amount of chordwise angle of attack chord and semispan Chord and Span chordwise ribs chordwise stiffening exceeded 100 psia experienced a static Figure film speed fluttered and failed Free Jet Free-stream frequencies Georgene H Heated Multiweb Wing installed in models involving primarily chordwise Jet at Mach jet starting Model Langley Field leading edge low-amplitude vibrations Mach Number Miltonberger mode involving primarily model behavior model skin model strain Model temperatures models MW-16 Models of 20-Inch models without ribs Multiweb Wing Structures MW-I NACA RM nodal pattern oscillograph previous tests Random vibrations due rib-stiffened models Rosecrans stagnation pressure exceeded stagnation temperature static bending type strain data strain gages installed temperature data Tests of Aerodynamically Tests of model thermal conductivity thermal stresses thermocouple tip bulkhead trailing edge Tunnel stagnation pressure type of failure undergoing flutter wave flutter mode Wing tore Wire strain gage