Cockpit Flight Controls and Wobble Pump (1927)

A close-up view inside the raw tubular steel cockpit of the Spirit of St. Louis, focusing on the mechanical flight controls and fuel routing. — Cockpit Flight Controls and Wobble Pump (1927) · Donald A. Hall Estate Collection

This highly detailed 1927 archival photograph documents the complex mechanical systems inside the Spirit of St. Louis. Engineered by Donald A. Hall Sr., the image clearly displays the rudder pedals, horizontal stabilizer adjustments, and the critical hand-operated wobble pump used to manually transfer fuel between tanks.