Two crisp, clean issues of a technical aviation magazine. Former owner's last name is written at the top of the outer front corner of two, and one has a couple light stains to bottom front cover -- otherwise without fault. The magazines measure 8-1/2"x11". Both have technical charts and drawings, but one also shows black and white photographs (see second picture). Among the articles are these: The Longitudinal Stability of Elastic Swept Wings at Supersonic Speed; A Study of the Response of an Airplane Landing Gear Using the Differential Analyzer; and The Flow Over a Wedge Profile at Mach Number 1. MANY OTHER ISSUES ON HAND