Hall X-1 Wing Spar, Internal Drag Strut, and Control Linkage Detail (Plate #5766) (Circa 1928)

Macro technical photograph plate 5766 showing internal spruce ribs, wooden spar, and control linkage of the Hall X-1 wing. — Hall X-1 Wing Spar, Internal Drag Strut, and Control Linkage Detail (Plate #5766) (Circa 1928) · Donald A. Hall Estate Collection

A primary engineering negative print (plate #5766) providing a macro structural study of the internal wing assembly of the Hall X-1 monoplane. Viewed vertically during shop assembly, the photograph details the built-up spruce truss ribs, the solid wooden spar beam, tubular steel compression drag struts, internal tension bracing wires with turnbuckles, and the aileron control torque-tube bellcrank linkage. This negative documents Hall's precise aerodynamic truss design and mechanical flight control engineering.