Ford Motor Company's Tri-Motor, built from 1926-1933, flew in many early American airline fleets. The all-metal airplane was rugged, dependable, and equally adaptable to passenger and freight service. Tri-Motors were built with some of the same mass production techniques used in Ford's automobile plants. In this photo, the propellers are being connected to the fuselage or the main body of the airplane.

Ford Motor Company's Tri-Motor, built from 1926-1933, flew in many early American airline fleets. The all-metal airplane was rugged, dependable, and equally adaptable to passenger and freight service. Tri-Motors were built with some of the same mass production techniques used in Ford's automobile plants. This photo reveals the assembly of a Tri-Motor bulkhead.

Henry Ford attempted to apply automobile assembly line techniques to the manufacture of airplanes, and to build them in large numbers. Monthly production peaked at 25 planes in June 1929. The Great Depression forced Ford to re-focus on his core auto business, and the company's commercial aircraft production ended in May 1933.

Ford Motor Company's Tri-Motor, built from 1926-1933, flew in many early American airline fleets. The all-metal airplane was rugged, dependable, and equally adaptable to passenger and freight service. Tri-Motors were built with some of the same mass production techniques used in Ford's automobile plants. The interior of the fuselage, or the main body of the airplane, is revealed in this photograph.

Ford Motor Company's Tri-Motor, built from 1926-1933, flew in many early American airline fleets. The all-metal airplane was rugged, dependable, and equally adaptable to passenger and freight service. Tri-Motors were built with some of the same mass production techniques used in Ford's automobile plants. This photo reveals the internal structure of a wing awaiting attachment to a fuselage.

Model 4-AT airliners were designed and built by Stout Metal Airplane Company, a division of Ford Motor Company. The all-metal, multi-engine planes earned a reputation for being rugged and dependable. From the late 1920s into the 1930s, they were the backbone of the scheduled airline industry. The 4-ATs eased public concerns about the safety of air travel and revolutionized commercial aviation.

Ford Motor Company's Tri-Motor, built from 1926-1933, flew in many early American airline fleets. The all-metal airplane was rugged, dependable, and equally adaptable to passenger and freight service. Tri-Motors were built with some of the same mass production techniques used in Ford's automobile plants. The fuselage, or the main body of the airplane, is constructed in this photograph.

Henry Ford attempted to apply automobile assembly line techniques to the manufacture of airplanes, and to build them in large numbers. Monthly production peaked at 25 planes in June 1929. The Great Depression forced Ford to re-focus on his core auto business, and the company's commercial aircraft production ended in May 1933.

Ford Motor Company's Tri-Motor, built from 1926-1933, flew in many early American airline fleets. The all-metal airplane was rugged, dependable, and equally adaptable to passenger and freight service. Tri-Motors were built with some of the same mass production techniques used in Ford's automobile plants. This version, the 8-AT was used to transport freight so did not have passenger seating. This photograph shows the 8-AT's cabin interior.

Ford Motor Company's Tri-Motor, built from 1926-1933, flew in many early American airline fleets. The all-metal airplane was rugged, dependable, and equally adaptable to passenger and freight service. Tri-Motors were built with some of the same mass production techniques used in Ford's automobile plants. In this photo, the interior of the 14-AT airplane wing structure is revealed.

Ford Motor Company's Tri-Motor, built from 1926-1933, flew in many early American airline fleets. The all-metal airplane was rugged, dependable, and equally adaptable to passenger and freight service. Tri-Motors were built with some of the same mass production techniques used in Ford's automobile plants. This version, the 14-AT, featured three Hispano-Suiza Engines. This photograph reveals the interior of the central engine.

Model 4-AT airliners were designed and built by the Stout Metal Airplane Company, a division of Ford Motor Company. The all-metal, multi-engine planes earned a reputation for being rugged and dependable. From the late 1920s into the 1930s, they were the backbone of the scheduled airline industry. The 4-ATs eased public concerns about the safety of air travel and revolutionized commercial aviation.

Ford Motor Company's Tri-Motor, built from 1926-1933, flew in many early American airline fleets. The all-metal airplane was rugged, dependable, and equally adaptable to passenger and freight service. Tri-Motors were built with some of the same mass production techniques used in Ford's automobile plants. Assembly plant workers are examining the bulkhead and engine in this photograph.