Engine and Firewall Details (1927)

A detailed view of the Spirit of St. Louis engine mount, showcasing the bare cylinders and the strategically placed oil tank acting as a firewall. — Engine and Firewall Details (1927) · Donald A. Hall Estate Collection

Another pristine 1927 structural view of the Spirit of St. Louis from the Donald A. Hall Estate. This photograph further details the forward fuel and oil tank configurations. The specific placement was mathematically calculated by Hall to manage the aircraft's shifting center of gravity as the massive fuel load was consumed.