Step inside a Ford Trimotor and the first thing you notice is the noise: three radial engines, one in the nose and one under each wing, hammering away a few feet from the passenger cabin. The second is the skin. The whole aeroplane, wings, fuselage and even the control surfaces, is made of corrugated aluminium, ridged like a tin roof.

That ridged metal gave it the nickname Tin Goose. Between 1926 and 1933 Ford built 199 of them, and in that short window the Trimotor helped turn flying from a stunt into a service. It carried the first coast-to-coast air-rail passengers, flew Richard Byrd over the South Pole and, nearly a century later, is still giving rides at American airfields.

A Salesman's Promise

The Ford Trimotor began with a salesman who did not mind telling investors the truth. In the early 1920s William Stout was raising money for his Stout Metal Airplane Company, and he mailed leading manufacturers a form letter asking for $1,000 each, with an unusual guarantee attached.

It worked. Stout raised $20,000, including $1,000 each from Henry Ford and his son Edsel, who were among about 20 investors. In 1925 Ford bought the company and its designs outright.

Stout's single-engined monoplane was turned into a trimotor, the 3-AT, but the prototype flew poorly. Ford's team went back to the drawing board, and the result was the 4-AT, which made its first flight on 11 June 1926, followed by the larger 5-AT.

Corrugated Metal and Borrowed Ideas

All-metal construction was not new. The Trimotor's fuselage and wings followed a pattern pioneered by Junkers in Germany, which had built corrugated aluminium-alloy airliners since the F 13 of 1920 and the G 24 trimotor of 1924. The ridges stiffened the thin skin, at the cost of extra drag.

The resemblance was close enough that Junkers sued when Ford tried to export a Trimotor to Europe, and won. Ford countersued in Prague in 1930 and lost again, with the court finding that Ford had infringed Junkers' patents.

EAA's own footage of its 1929 Ford Tri-Motor in flight.

Where the Trimotor stood out was in its practicality. The ailerons, elevators and rudders were corrugated metal too, rather than fabric. The rudder and elevator cables ran along the outside of the fuselage, and the engine gauges were mounted on the engines themselves, read by the pilot through the windshield. Ground crews could service it in the field from scaffolding, and it could be fitted with skis or floats.

The original 4-AT carried a crew of three, a pilot, a copilot and a stewardess, plus eight or nine passengers. Later versions grew: the 5-AT-B seated 15, the 5-AT-C 17, with more powerful Pratt & Whitney Wasp engines doing the pulling. Seats could be removed for freight, and the 5-AT added drop-down cargo holds under the inner wings.

Coast to Coast by Rail and Air

The Trimotor's moment came in 1929. Transcontinental Air Transport, the airline Clement Keys founded with Charles Lindbergh's help and nicknamed the Lindbergh Line, began its coast-to-coast service on 7 July 1929. It promised New York to Los Angeles in 48 hours.

The catch was that nobody flew at night. Passengers left New York by Pennsylvania Railroad sleeper, boarded a Trimotor at Columbus, Ohio, and flew to Waynoka, Oklahoma, an 11-hour hop with four stops. A Santa Fe train carried them overnight to Clovis, New Mexico, where a second Trimotor flew them on to Grand Central Air Terminal in Glendale, near Los Angeles.

It was a demanding trip, and it lasted only about a year before TAT merged with Western Air Express to form what became TWA. Elsewhere the type opened international routes: Pan American used Trimotors on its first scheduled flights from Key West to Havana in 1927, and Cubana introduced it to Latin America in 1930. Well over 100 airlines flew the type.

Over the Bottom of the World

The Trimotor's most famous flight had nothing to do with airlines. For his first Antarctic expedition, Commander Richard E. Byrd took a Ford 4-AT-B, registered NX4542, and named it Floyd Bennett after his late pilot from the 1926 North Pole attempt.

On 28 November 1929 Byrd, as navigator, launched from his Little America base with pilot Bernt Balchen, co-pilot and radioman Harold June and photographer Ashley McKinley. The Trimotor struggled to climb high enough to cross onto the Antarctic Plateau, and the crew dumped empty fuel tanks and emergency supplies to gain altitude. They reached the pole and returned after 18 hours and 41 minutes.

The Henry Ford museum in Dearborn, Michigan, which dates the flight 28 to 29 November 1929, still displays the aircraft, a gift of Edsel Ford. The words FLOYD BENNETT and BYRD ANTARCTIC EXPEDITION are still painted on its sides.

The type collected other firsts along the way. In February 1930 a Trimotor carried Elm Farm Ollie, the first cow to fly and to be milked in flight. In 1932 Franklin D. Roosevelt campaigned for president aboard one, an early use of an aircraft in an election.

HistoryPod's short account of Byrd's South Pole flight in the Floyd Bennett.

Why Ford Walked Away

The Trimotor's heyday was brief. The Boeing 247, a far more advanced all-metal airliner, first flew at the start of 1933, and the Douglas DC-2 followed in 1934. Ford's personal pilot, Harry J. Brooks, had also been killed on a test flight, and Henry Ford lost interest in aviation. Production ended on 7 June 1933.

Ford never made a profit on aircraft, but his name lent credibility to an infant industry. He also helped introduce paved runways, passenger terminals, hangars, airmail and radio navigation. Stout left Ford in 1930, and in 1954 bought the rights to revive the design as the Stout Bushmaster 2000; only two were completed.

The airframes themselves refused to die. Retired from major airlines, Trimotors hauled heavy freight to jungle and mountain mines for decades. In 1942 one evacuated people during the Battle of Bataan, carrying 24 at a time on trips of nearly 500 miles until it was strafed and destroyed by Japanese aircraft. Scenic Airways' N414H flew sightseers over the Grand Canyon for 65 years.

The Tin Goose Still Flies

As of 2025, 18 Ford Trimotors still existed and eight held current FAA airworthiness certificates. The oldest flying example, 4-AT-A NC1077, is restored to its December 1927 appearance; Lindbergh and Amelia Earhart both flew it.

The best known is the Experimental Aircraft Association's 4-AT-E, NC8407, which first flew on 21 August 1929 and went to Eastern Air Transport, whose colours it wears today. It was leased to Cubana in 1930, then flew as a barnstormer, a crop duster, a borate bomber for fighting forest fires and a smoke-jumper transport. EAA says that, re-engined for crop-dusting, it became the most powerful Model 4-AT ever flown.

In 1973 a thunderstorm at the EAA Fly-In in Burlington, Wisconsin, ripped NC8407 from its tie-downs, lifted it 50 feet and smashed it down on its back. EAA bought the wreck, and after a 12-year restoration the Trimotor flew again at Oshkosh in 1985. Since 1991 it has been back doing what Ford built it for: carrying paying passengers.

Climb aboard today and the ridged metal, the exposed cables and those three clattering radials tell the story better than any museum label. The Tin Goose was never the most advanced airliner of its era, but it was the one that convinced Americans they could buy a ticket and fly.

EAA marks its Trimotor's return to passenger-carrying service.

Sources: Wikipedia (Ford Trimotor, Richard E. Byrd, Transcontinental Air Transport), Experimental Aircraft Association, The Henry Ford, San Diego Air and Space Museum Archives