Ford Trimotor

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Trimotor
Ford Trimotor EAA.jpg
Experimental Aircraft Association (EAA) Ford 4-AT-E Trimotor (2014)
RoleTransport aircraft
Manufacturer Stout Metal Airplane Division of the Ford Motor Company
Designer William Bushnell Stout
First flightJune 11, 1926
Introduction1926
StatusLimited excursion service
Primary usersabout 100 airlines
United States Army Air Corps
United States Navy
Royal Canadian Air Force
Number built199
Variants Stout Bushmaster 2000

The Ford Trimotor (also called the "Tri-Motor", and nicknamed the "Tin Goose") is an American three-engined transport aircraft. Production started in 1925 by the companies of Henry Ford and ended on June 7, 1933. A total of 199 Ford Trimotors were made. [1] It was designed for the civil aviation market, but also saw service with military units.

Contents

Design and development

Ford Trimotor interior NC8407 Ford 4-AT Tri-Motor MD2.jpg
Ford Trimotor interior

The Ford Trimotor was a development of previous designs by William Bushnell Stout, using structural principles copied from the work of Professor Hugo Junkers, the noted German all-metal aircraft design pioneer, and adapted to an airframe very similar to the Fokker F.VII - even using the same airfoil cross section at the wing root.

In the early 1920s, Henry Ford, along with a group of 19 other investors including his son Edsel, invested in the Stout Metal Airplane Company. Stout, a bold and imaginative salesman, sent a mimeographed form letter to leading manufacturers, blithely asking for $1,000 and adding: "For your one thousand dollars you will get one definite promise: You will never get your money back." Stout raised $20,000, including $1,000 each from Edsel and Henry Ford. [2]

In 1925, Ford bought Stout and its aircraft designs. The single-engined Stout monoplane was turned into a trimotor, the Stout 3-AT with three Curtiss-Wright air-cooled radial engines. After a prototype was built and test-flown with poor results, and a suspicious fire caused the complete destruction of all previous designs[ citation needed ], the "4-AT" and "5-AT" emerged.

The Ford Trimotor using all-metal construction was not a revolutionary concept, but it was certainly more advanced than the standard construction techniques of the 1920s. The aircraft resembled the Fokker F.VII Trimotor (except for being all-metal which Henry Ford claimed made it "the safest airliner around"). [3] Its fuselage and wings followed a design pioneered by Junkers [4] during World War I with the Junkers J.I and used postwar in a series of airliners starting with the Junkers F.13 low-wing monoplane of 1920 of which a number were exported to the US, the Junkers K 16 high-wing airliner of 1921, and the Junkers G 24 trimotor of 1924. All of these were constructed of aluminum alloy, which was corrugated for added stiffness, although the resulting drag reduced its overall performance. [5] So similar were the designs that Junkers sued and won when Ford attempted to export an aircraft to Europe. [6] In 1930, Ford countersued in Prague, and despite the possibility of anti-German sentiment, was decisively defeated a second time, with the court finding that Ford had infringed upon Junkers' patents. [6]

Although designed primarily for passenger use, the Trimotor could be easily adapted for hauling cargo, since its seats in the fuselage could be removed. To increase cargo capacity, one unusual feature was the provision of "drop-down" cargo holds below the lower inner wing sections of the 5-AT version. [3] [7]

Corrugated wing of a 1929 Ford 4-AT-E Trimotor FordTriMotorCorrugatedWing.jpg
Corrugated wing of a 1929 Ford 4-AT-E Trimotor

One 4-AT with Wright J-4 200-hp engines was built for the U.S. Army Air Corps as the C-3, and seven with Wright R-790-3 (235 hp) as C-3As. The latter were upgraded to Wright R-975-1 (J6-9) radials at 300 hp and redesignated C-9. Five 5-ATs were built as C-4s or C-4As.

The original (commercial production) 4-AT had three air-cooled Wright radial engines. It carried a crew of three: a pilot, a copilot, and a stewardess, as well as eight or nine passengers [N 1] . [3] The later 5-AT had more powerful Pratt & Whitney engines. All models had an aluminum corrugated sheet-metal body and wings. Unlike many aircraft of this era, extending through World War II, its control surfaces (ailerons, elevators, and rudders) were not fabric-covered, but were also made of corrugated metal. As was common for the time, its rudder and elevators were actuated by metal cables that were strung along the external surface of the aircraft. Engine gauges were also mounted externally, on the engines, to be read by the pilot while looking through the aircraft windshield. [3] Another interesting feature was the use of the hand-operated "Johnny brake." [8]

Like Ford cars and tractors, these Ford aircraft were well designed, relatively inexpensive, and reliable (for the era).[ citation needed ] The combination of a metal structure and simple systems led to their reputation for ruggedness. Rudimentary service could be accomplished "in the field" with ground crews able to work on engines using scaffolding and platforms. [5] To fly into otherwise-inaccessible sites, the Ford Trimotor could be fitted with skis or floats. [5]

Externally mounted control wires of a Ford Trimotor FordTriMotorControlWires.JPG
Externally mounted control wires of a Ford Trimotor

The rapid development of aircraft at this time (the vastly superior Boeing 247 first flew at start of 1933), along with the death of his personal pilot, Harry J. Brooks, on a test flight, led to Henry Ford's losing interest in aviation. While Ford did not make a profit on its aircraft business, Henry Ford's reputation lent credibility to the infant aviation and airline industries, and Ford helped introduce many aspects of the modern aviation infrastructure, including paved runways, passenger terminals, hangars, airmail, and radio navigation. [1] [N 2]

In the late 1920s, the Ford Aircraft Division was reputedly the "largest manufacturer of commercial airplanes in the world." [9] Alongside the Ford Trimotor, a new single-seat commuter aircraft, the Ford Flivver or "Sky Flivver" had been designed and flown in prototype form, but never entered series production. [9] The Trimotor was not to be Ford's last venture in aircraft production. During World War II, the largest aircraft manufacturing plant in the world was built at the Willow Run, Michigan plant, where Ford produced thousands of B-24 Liberator bombers under license from Consolidated Aircraft. [10]

William Stout left the Metal Airplane division of the Ford Motor Company in 1930. He continued to operate the Stout Engineering Laboratory, producing various aircraft. In 1954, Stout purchased the rights to the Ford Trimotor in an attempt to produce new examples. A new company formed from this effort brought back two modern examples of the trimotor aircraft, renamed the Stout Bushmaster 2000, but even with improvements that had been incorporated, performance was judged inferior to modern designs.

Operational history

Restored 1929 Ford 4-AT-E Trimotor "NC8407" owned by the Experimental Aircraft Association (EAA) and painted in the colors of Eastern Air Transport EAA Ford Trimotor.jpg
Restored 1929 Ford 4-AT-E Trimotor "NC8407" owned by the Experimental Aircraft Association (EAA) and painted in the colors of Eastern Air Transport

A total of 199 Ford Trimotors were built between 1926 and 1933, including 79 of the 4-AT variant, and 117 of the 5-AT variant, plus some experimental craft. Well over 100 airlines of the world flew the Ford Trimotor. [1] From mid-1927, the type was also flown on executive transportation duties by several commercial nonairline operators, including oil and manufacturing companies.

The impact of the Ford Trimotor on commercial aviation was immediate, as the design represented a "quantum leap over other airliners." [11] Within a few months of its introduction, Transcontinental Air Transport was created to provide coast-to-coast operation, capitalizing on the Trimotor's ability to provide reliable and, for the time, comfortable passenger service. While advertised as a transcontinental service, the airline had to rely on rail connections with a deluxe Pullman train that would be based in New York being the first part of the journey. Passengers then met a Trimotor in Port Columbus, Ohio, that would begin a hop across the continent ending at Waynoka, Oklahoma, where another train would take the passengers to Clovis, New Mexico, where the final journey would begin, again on a Trimotor, to end up at the Grand Central Air Terminal in Glendale, a few miles northeast of Los Angeles. [11] This demanding trip would be available for only a year before Transcontinental was merged into a combine with Western Air Service.

Ford Trimotors were also used extensively by Pan American Airways, for its first international scheduled flights from Key West to Havana, Cuba, in 1927. Eventually, Pan American extended service from North America and Cuba into Central and South America in the late 1920s and early 1930s. [12] One of Latin America's earliest airlines, Cubana de Aviación, was the first to use the Ford Trimotor in Latin America, starting in 1930, for its domestic services.

The heyday for Ford's transport was relatively brief, lasting only until 1933, when more modern airliners began to appear. Rather than completely disappearing, the Trimotors gained an enviable reputation for durability with Ford ads in 1929 proclaiming, "No Ford plane has yet worn out in service." [12] First being relegated to second- and third-tier airlines, the Trimotors continued to fly into the 1960s, with numerous examples being converted into cargo transports to further lengthen their careers, and when World War II began, the commercial versions were soon modified for military applications.

On display in Washington, D.C. FordTrimotor DC.JPG
On display in Washington, D.C.

Some of the significant flights made by the Ford Trimotor in this period greatly enhanced the reputation of the type for strength and reliability. One example was Ford 4-AT Trimotor serial number 10, built in 1927. It flew in the United States and Mexico under registration number C-1077, and for several years in Canada under registration G-CARC. It had many notable accomplishments; it was flown by Charles Lindbergh and Amelia Earhart, among many others. It made the first commercial flight from the United States to Mexico City, as well as the first commercial flight over the Canadian Rockies. After damage on landing in 1936, it was grounded and remained for decades at Carcross, Yukon. In 1956, the wreck was salvaged and preserved, and in the mid 1980s, Greg Herrick took over C-1077 and began restoring it. As of 2006, C-1077 is in flying condition again, restored to its December 1927 appearance. [1]

Making headlines became a Trimotor trademark. On November 27 and 28, 1929, Commander Richard E. Byrd (navigator), chief pilot Bernt Balchen, and two other crewmen, the copilot and the photographer, made the first flight above the geographic South Pole in a Ford Trimotor that Byrd named the Floyd Bennett. This was one of three aircraft taken on this polar expedition, with the other two being named The Stars and Stripes and The Virginian, replacing the Fokker Trimotors that Byrd previously used. [5]

A Ford Trimotor was used for the flight of Elm Farm Ollie, the first cow to fly in an aircraft and to be milked mid-flight. [13]

Franklin Roosevelt also flew aboard a Ford Trimotor in 1932 during his presidential campaign in one of the first uses of an aircraft in an election, replacing the traditional "whistle stop" train trips. [14]

The cockpit of NC-8407 NC8407 Ford 4-AT Tri-Motor MD1.jpg
The cockpit of NC-8407

The long-range capabilities of the Ford Trimotor were exploited in a search for the lost flyers of the Sigizmund Levanevsky trans-polar flight in 1937. Movie stunt flyer Jimmie Mattern flew a specially modified Lockheed Electra along with fellow movie flyer, Garland Lincoln, flying a stripped-down Trimotor donated by the president of Superior Oil Company. With 1,800 gallons of avgas and 450 gallons of oil in the modified cabin, the Trimotor was intended to act as a "tanker" for the expedition. The Electra was able to transfer fuel in the air from the Trimotor, through a hose cast out the 4-AT's door. With the first aerial refueling test successful, the pair of pilots set out for Fairbanks, landing first at Burwash Landing, Yukon Territory, Canada, on August 15, 1937, but the Trimotor ran out of fuel and crashed in inclement weather the following day. The Trimotor was abandoned on the tundra. [15]

One of the major uses of the Trimotor after it was superseded as a passenger aircraft by more modern aircraft like the Boeing 247 (1933) or the Douglas DC-2 (1934), then DC-3, was the carrying of heavy freight to mining operations in jungles and mountains. The Trimotor was employed for decades in this role. [16]

In 1942, during the Battle of Bataan, a Trimotor was used in evacuations. The aircraft would haul 24 people nearly 500 miles a trip, twice daily. The aircraft was eventually strafed and destroyed by Japanese aircraft. [17] That same year, another 5-AT-C was used by the Royal Australian Air Force during the Kokoda Track campaign.[ citation needed ]

Former Royal Australian Air Force (33 Squadron) Ford 5-AT-C A45-1 displayed at the Papua New Guinea National Museum and Art Gallery, Port Moresby. Former Royal Australian Air Force (33 Squadron) Ford 5-AT-C A45-1 displayed at the National Museum and Art Gallery, Port Moresby.jpg
Former Royal Australian Air Force (33 Squadron) Ford 5-AT-C A45-1 displayed at the Papua New Guinea National Museum and Art Gallery, Port Moresby.

In postwar years, the Ford Trimotors continued in limited service with small, regional air carriers. One of the most famous was the Scenic Airways Ford Trimotor N414H which was used for 65 years as a sightseeing aircraft flying over the Grand Canyon. [3] The aircraft is still in use as of late 2011, mainly for promotional and film work, though one Trimotor operator offers rides.[ citation needed ]

Two Ford Trimotors are still being used by the Experimental Aircraft Association (EAA) to fly passengers on sightseeing tours : a 4 -AT-E, bought by the association after a crash and fully restored, and a 5-AT-B owned by the Liberty Aviation Museum.[ citation needed ]

Ford Trimotor passenger's view of one engine Ford Trimotor Detail 2.jpg
Ford Trimotor passenger's view of one engine

Variants

Ford 3-AT
The original Stout prototype; one built.
Ford 4-AT
Pre-production prototype, powered by three 200-hp (150-kW) Wright J-4 Whirlwind radial piston engines, accommodation for two pilots and eight passengers; one built.
Ford 4-AT-A
The original production version, similar to the Ford 4-AT prototype; 14 built.
Ford 4-AT-B
Improved version, powered by three 220-hp (165-kW) Wright J-5 Whirlwind radial piston engines, accommodation for two pilots and 12 passengers; 39 built.
Ford 4-AT-C
Similar to the Ford 4-AT-B, equipped with a 400-hp (300-kW) Pratt & Whitney Wasp radial piston engine, fitted in the nose of the aircraft; one built.
Ford 4-AT-D
Three aircraft similar to the Ford 4-AT-B, each with different engines and minor modifications.
Ford 4-AT-E
Similar to the Ford 4-AT-B, powered by three 300-hp (225-kW) Wright J-6-9 Whirlwind nine-cylinder radial piston engines; 24 built.
Ford 4-AT-F
One aircraft similar to the Ford 4-AT-E.
Ford 5-AT-A
Enlarged version, powered by three 420-hp (320-kW) Pratt & Whitney Wasp radial piston engines, accommodation for two pilots and 13 passengers, the wingspan was increased by 3 ft 10 in (1.17 m); three built.
TAT Ford 5-AT-B flown by Lindbergh EL-2002-00560.jpg
TAT Ford 5-AT-B flown by Lindbergh
Ford 5-AT-B
Similar to the Ford 5-AT-A, powered by 420-hp Pratt & Whitney Wasp C-1 or SC-1 radial piston engines, accommodation for two pilots and 15 passengers; 41 built.
Ford 5-AT-C
Improved version, similar to the Ford 5-AT-A, accommodation for two pilots and 17 passengers; 51 built.
Ford 5-AT-CS
Seaplane version, fitted with Edo floats; one built.
Ford 5-AT-D
Increased-weight version, powered by three 450-hp (340-kW) Pratt & Whitney Wasp SC radial piston engines. The wings were mounted 8 in (20 cm) higher, to increase cabin headroom, but otherwise similar to the Ford 5-AT-C; 20 built.
Ford 5-AT-DS
Seaplane version, fitted with Edo floats; one built.
Ford 5-AT-E
Proposed version, the engines were relocated to the wing leading edges.
Ford 6-AT-A
Similar to the Ford 5-AT-A, powered by three 300-hp Wright J-6-9 radial piston engines; three built.
Ford 6-AT-AS
Seaplane version, fitted with Edo floats; one built.
Ford 7-AT-A
Redesignation of a single Ford 6-AT-A, equipped with a 420-hp Pratt & Whitney Wasp radial piston engine, fitted in the nose of the aircraft.
Ford 8-AT
One Ford 5-AT-C converted into a single engine freight transport aircraft. Six different engines ranging from 575 hp (429 kW) to 700 hp (520 kW) were installed. [18]
Ford 9-AT
Redesignation of a single Ford 4-AT-B, fitted with three 300-hp Pratt & Whitney Wasp radial piston engines.
Ford 11-AT
Redesignation of a single Ford 4-AT-E, fitted with three 225-hp Packard DR-980 diesel engines.
Ford 13-A
Redesignation of a single Ford 5-AT-D, fitted with two 300-hp Wright J-6-9 Whirlwind radial piston engines, and a 575-hp (430-kW) Wright Cyclone radial piston engine fitted in the nose of the aircraft.
Ford 14 AT photo from L'Aerophile May 1932 Ford 14 AT L'Aerophile May 1932.jpg
Ford 14 AT photo from L'Aerophile May 1932
Ford 14-A
Much larger and morepowerful tri-motor, carrying 32 passengers.
Ford XB-906
One Ford 5-AT-D was converted into a three-engined bomber aircraft.

United States military designations

XC-3
One 4-AT-A evaluated by the United States Army Air Corps, redesignated C-3 after evaluation. [19]
C-3
One 4-AT-A was redesignated from XC-3 following evaluation [19]
C-3A
Model 4-AT-E a military transport version, powered by three 235-hp Wright R-790-3 Whirlwind radial piston engines; seven built, all later converted to C-9 [19]
C-4
One 4-AT-B acquired by the military for evaluation [19]
A C-4A Ford C-4 Tri-Motor.jpg
A C-4A
C-4A replica Ford C-4A.jpg
C-4A replica
C-4A
Military transport version, based on the Ford 5-AT-D, powered by three 450-hp Pratt & Whitney R-1340-11 Wasp piston engines; four built [19]
C-4B
One C-4A re-engined with three 450-hp R-1340-7 engines. [19]
C-9
Redesignation of all seven C-3As fitted with 300-hp (224 Kw) Wright R-975-1 radial piston engines [20]
XJR-1
One Model 4-AT-A for evaluation by the United States Navy [21]
JR-2
Military transport version for U.S. Marine Corps, based on the Ford 4-AT-E, but with three Wright J6-9 engines; two built, redesignated RR-2 in 1931 [21]
JR-3
Military transport version for the U.S. Navy (one) and U.S. Marine Corps (two), based on the Ford 5-AT-C; three built. [21]
Ford RR-1 at Langley Virginia 1934 EL-2002-00549.jpg
Ford RR-1 at Langley Virginia 1934
RR-1
Redesignation of the XJR-1 prototype [22]
RR-2
Redesignation of the JR-2 in 1931 [22]
RR-3
Redesignation of the JR-3 in 1931 [22]
RR-4
Designation for one 5-AT-C [22]
RR-5
Designation for two 4-AT-D, one each for the U.S. Navy and U.S. Marines [22]

Operators

Civil operators

1927 4-AT-A, Serial No. 10, C-1077 Ford 4AT Trimotor.JPG
1927 4-AT-A, Serial No. 10, C-1077
Grand Canyon Airlines Ford Trimotor (note the deployed wing cargo pannier) Scenic Trimotor.JPG
Grand Canyon Airlines Ford Trimotor (note the deployed wing cargo pannier)
Flag of Colombia.svg  Colombia
Canadian Red Ensign (1921-1957).svg  Canada
Flag of Cuba.svg  Cuba
Flag of the Czech Republic.svg  Czechoslovakia
Flag of the Dominican Republic.svg  Dominican Republic
Flag of Mexico (1934-1968).svg  Mexico
Flag of Spain.svg  Spain
Flag of the United States (1912-1959).svg  USA
Flag of Venezuela.svg  Venezuela

Military operators

Ford Trimotor G-CYWZ of the Royal Canadian Air Force Ford Trimotor.jpg
Ford Trimotor G-CYWZ of the Royal Canadian Air Force
Flag of Australia (converted).svg  Australia
Canadian Red Ensign (1921-1957).svg  Canada
Flag of Colombia.svg  Colombia
Flag of Spain (1931-1939).svg  Spain
Flag of the United Kingdom.svg  United Kingdom
Flag of the United States (1912-1959).svg  USA

Accidents and incidents

Surviving aircraft

As of 2011, there are 18 Ford Trimotors in existence, eight of which have current FAA airworthiness certificates. [34] [N 3]

Airworthy

Ford Trimotor at the Air Zoo Air Zoo December 2019 046 (Ford Tri-Motor).jpg
Ford Trimotor at the Air Zoo

On static display

Under restoration

From 1954 onwards, efforts have been made to produce a modernized version of the Trimotor as the Stout Bushmaster 2000. [8] Saddled with financial, management and marketing problems, only two examples were initially built with a third fuselage never completed. [71]

Specifications (Ford 4-AT-E Trimotor)

Short recording alongside EAA's Ford TriMotor while in Miami, Fl, USA

Data from Flight International 14 November 1930 [72]

General characteristics

Performance

Notable appearances in media

See also

Related development

Aircraft of comparable role, configuration, and era

Related lists

Related Research Articles

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References

Notes

  1. Up to 12 passengers could be accommodated in special configurations.
  2. Note: The 28-page booklet, The Amazing Story of America's Oldest Flying Airliner, describes the history of the Ford Trimotor 4-AT-10, C-1077, also known as G-CARC "Niagara". It also describes the restoration process and some general history of Ford's Trimotor, as well as his aviation enterprises.
  3. Note: The Ford Tri-Motor List is an enthusiast's register of existing Ford Trimotors, Bushmasters and Stinson Trimotors.

Citations

  1. 1 2 3 4 Herrick, Greg A. "The Amazing Story of America's Oldest Flying Airliner" (PDF). Archived from the original on June 28, 2017. Retrieved April 4, 2019.CS1 maint: bot: original URL status unknown (link)fordtri-motor.com, Yellowstone Aviation, Inc (Jackson, Wyoming), 2004. Retrieved: April 4, 2019.
  2. "Ford Trimotor." Archived April 23, 2006, at the Wayback Machine Smithsonian. Retrieved: July 14, 2010.
  3. 1 2 3 4 5 Winchester 2004, p.151.
  4. Larkins 1992, p.29
  5. 1 2 3 4 Winchester 2004, p. 150.
  6. 1 2 Larkins 1992, pp.154–156
  7. "Plane Carries Mail In Wing To Increase Load"(photo of under wing cargo carriers). Popular Mechanics, February 1931.
  8. 1 2 "Return of the Tin Goose." Archived 2011-05-29 at the Wayback Machine Time, January 6, 1967. Retrieved: July 29, 2008.
  9. 1 2 Head and Pretzer 1990, p. 53.
  10. Head and Pretzer 1990, p. 57.
  11. 1 2 O'Leary 2006, p. 54.
  12. 1 2 O'Leary 2006, p. 55.
  13. C. B. Harding (2000). The Guernsey Breed: An Illustrated Chronicle. Hillsboro Press. ISBN   978-1-57736-177-0.
  14. Larkins 1992, p. 170.
  15. Wynne 1987, p. 53.
  16. Jardine, T. F. "Airplanes Help Mine Gold" (photos of Trimotor hauling freight to mine operations in Andes). Popular Science Monthly, March 1935.
  17. "Those Fabulous Fords." Popular Mechanics,June 1953.
  18. AAHS Journal: 41. Spring 2004.Missing or empty |title= (help)
  19. 1 2 3 4 5 6 Andrade 1979, p. 95.
  20. Andrade 1979, p. 96.
  21. 1 2 3 Andrade 1979, p. 197.
  22. 1 2 3 4 5 Andrade 1979, p. 218.
  23. Tidd, Claude. "Yukon Archives Image CF-AZB". tc.gov.yk.ca. Retrieved July 26, 2017.
  24. "Ford Trimotor Videos." Archived 2011-04-27 at the Wayback Machine Fly Dominican Republic. Retrieved: July 14, 2010.
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Bibliography

Further reading