Elevator Framework (1927)

A close-up view of the bare tubular steel framework of the Spirit of St. Louis elevator, resting on a wooden box. — Elevator Framework (1927) · Donald A. Hall Estate Collection

Another detailed archival view of the bare tubular steel framework for the Spirit of St. Louis tail assembly. Donald A. Hall Sr. documented the exact dimensions of these control surfaces, which were specifically engineered in 1927 to induce the slight aerodynamic instability necessary to combat pilot fatigue.