NACA research memorandum RM (series). L57H01. Tests of aerodynamically heated multiweb wing structures in free jet at Mach no. 2, three aluminum-alloy models and one steel model of 20-inch chord and span with various internal structures and skin thicknesses [with list of references]; by Richard Rosecrans, Louis F. Vosteen, and William J. Batdorf, jr.