Metal construction development. Part IV : moments of inertia of thin corrugated sections
A 1929 NASA technical report, Part IV of a metal construction development series, presents moments of inertia for thin corrugated sections, likely for aeronautical engineers and structural designers. The figures are engineering line drawings: a geometric diagram with angles and radii labelled, a dimensioned corrugation profile on a spar axis, and a grid chart plotting angle against radius ratio with a family of curves.
