Impact buckling of thin bars in the elastic range for any end condition
A 1934 NASA technical report on impact buckling of thin elastic bars for any end condition, compiled from the NACA-era aeronautics record set. The four plates are engineering charts of nondimensional curves (families labelled m through v) plotted against parameters b, λ and κ, showing how buckling response varies with end constraint. A designer might take from them the clean, dense graph style of mid-century technical plots, with labelled curve families, fine grid lines and log-scale axes.
