Duesenberg Model A

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"Duesenberg Straight Eight" redirects here. For straight-eight engines made by Duesenberg, see
Duesenberg Straight-8 engine. For the later Duesenberg luxury automobile powered by a straight-eight engine, see Duesenberg Model J
.

Duesenberg Model A
OHC straight-eight engine[4][5]
Transmission3 speed manual[1]
Dimensions
Wheelbasestandard: 3,403.6 mm (134 in)
long: 3,581.4 mm (141 in)[4]
Chronology
SuccessorDuesenberg Model X[4]
Duesenberg Straight 8
Cooling system
water cooled
Output
Power output88 bhp (66 kW) @ 3600 rpm
Torque output170 lb⋅ft (230 N⋅m) at 1500 rpm[6]
Chronology
SuccessorDuesenberg Model X[4]

The Duesenberg Model A was the first

Indianapolis, Indiana, from 1921 to 1925 by the Duesenberg Automobiles and Motors Company and from 1925 to 1926 at the same factory by the restructured Duesenberg Motor Company. The successors to the company began referring to the car as the Model A when the Model J
was introduced. With a top speed of 71mph.

Background

Fred and August Duesenberg built aircraft and marine engines during World War I and used this expertise to design and build racing engines and to design a car.[7] The Duesenberg Automobiles and Motors Company was incorporated in Delaware and founded to manufacture and market the production car while Duesenberg Brothers, a separate organization, built racing cars and engines.[8]

Introduction and delay

The Duesenberg Straight Eight was introduced in late 1920 at the

Commodore Hotel in New York City,[9][10] but production of the Straight Eight did not begin until late 1921. The main reason for the delay was Fred Duesenberg's decision to redesign several aspects of the car, including the valvetrain.[11] The headquarters and manufacturing facilities of the Duesenberg Automobiles and Motors Company were relocated from Newark, New Jersey, to Indianapolis, Indiana during this time. The move was completed in May 1921, but the redesign was not.[12]

Design and engineering

Drivetrain

The Straight Eight was the first car in series production in the United States with a straight-eight engine.

overhead camshaft[1][5][6] which used rockers to operate two valves per cylinder[6] in a hemispheric combustion chamber.[4][6]

The engine used a single

intake manifold on the left side of the engine. Ignition was by Delco coil and breaker points, with the distributor at the end of the generator/starter unit.[5]

With a 2.875 in (73.0 mm) bore and a 5 in (127.0 mm) stroke,[6] the engine had a displacement of 260 cu in (4.3 L).[4][5][6] The standard compression ratio of five to one yielded 88 hp (66 kW) at 3600 rpm[5] and 170 lb⋅ft (230 N⋅m) of torque at 1500 rpm.[6]

A single dry-plate clutch and an unsynchronized three-speed gearbox were bolted to the engine. The gearbox was operated directly with a central shift lever. The drive shaft was enclosed in a torque tube and drove the live rear axle through a spiral bevel drive.[6]

Chassis

1922 Duesenberg Model A Dual Cowl Phaeton by Fleetwood

The chassis was based on a pressed steel ladder frame with channel-section side members and fabricated and tubular cross members. Suspension was by semi-elliptic leaf springs and Watson Stabilator dampers front and rear, with a tubular beam axle at the front and a live axle and radius rods at the rear.[6] The standard wheelbase was 134 inches (3,400 mm),[4][5][6] with a wheelbase of 141 inches (3,600 mm) available for seven-passenger bodies.[4] The front and rear tracks were both 56 inches (1,400 mm) wide.[6] Center-locking wire wheels with 5" x 33" tires were used front and rear.[6]

The Duesenberg Straight Eight was the first production automobile to use Lockheed Corporation Hydraulic brakes on all four wheels.[1][14][15] The brakes on the front wheels were 16 inches (410 mm) in diameter and were finned to dissipate heat. The fluid used in the system was a mixture of glycerine and water.[1]

Reception

Duesenberg Model A badge and mascot

The initial production target was 100 cars per month. By the end of 1922, after slightly more than a year of production, fewer than 150 Duesenberg Straight Eights had been built.[16][17] Production of the Straight Eight continued through several changes in management,[17][18] placement of the Duesenberg Automobiles and Motors Company into receivership in January 1924,[2][17][19] and the restructuring of the company into the Duesenberg Motor Company in February 1925,[2][17][20] until the purchase of the company by E. L. Cord in October 1926.[2][14][21] About 650 Straight Eights had been built when Cord ended production in 1926.[2][22]

Legacy

1926 Duesenberg Model A Roadster at Stahls Automotive Collection

The Duesenberg Model X, a derivative of the Straight Eight, had a short production run in 1927. About twelve were built.[2][22] The Model X had an engine with the same bore and stroke as the Straight Eight[23] but with a non-crossflow head. The engine delivered 100 horsepower (75 kW). The chassis had a wheelbase of 135 inches (3,400 mm).[2]

Despite its regional and worldwide automotive firsts, the Straight Eight has been obscured by the later Model J.[24] It is no longer widely known by the Straight Eight name under which it was marketed and sold, having been renamed the "Model A" after the introduction of the Model J.[2][3][25][26]

Notes

  1. ^ a b c d e f g Posthumus 1977, p. 76.
  2. ^ a b c d e f g h i Mueller 2006, p. 52.
  3. ^ a b Robson 2001, p. 181.
  4. ^ a b c d e f g h i Kimes 1990, p. 231.
  5. ^ a b c d e f g h i j k Mueller 2006, p. 51.
  6. ^ a b c d e f g h i j k l m n o p q r s t Robson 2001, p. 180.
  7. ^ Adler 2004, pp. 56–57, 59–60.
  8. ^ Adler 2004, pp. 60, 62.
  9. ^ a b Kimes 1990, p. 230.
  10. ^ Adler 2004, p. 62.
  11. ^ Adler 2004, pp. 62, 64.
  12. ^ Adler 2004, p. 65.
  13. ^ Adler 2004, p. 64.
  14. ^ a b Borgeson 2005, p. 40.
  15. ^ Sedgwick 1972, p. 65.
  16. ^ Adler 2004, p. 67.
  17. ^ a b c d Borgeson 2005, p. 42.
  18. ^ Adler 2004, pp. 66–68.
  19. ^ Adler 2004, p. 71.
  20. ^ Adler 2004, pp. 72, 74.
  21. ^ Adler 2004, p. 77.
  22. ^ a b Adler 2004, p. 78.
  23. ^ Borgeson 2005, p. 182.
  24. ^ Vance 2005.
  25. ^ Adler 2004, p. 53.
  26. ^ Adler 2004, p. 54.

References

  • Adler, Dennis (2004). "Chapter Four: The Power of the Hour". Duesenberg. Krause Publications. pp. 53–82.
    LCCN 2004101588. Retrieved 2014-01-11.[permanent dead link
    ]
  • LCCN 2003114944
    . Retrieved 2014-01-11.
  • Kimes, Beverly Rae, ed. (1990). "Duesenberg". The Classic Car. Des Plaines, IL USA:
    LCCN 90084421
    .
  • Mueller, Mike (2006). "Chapter 6 - Chariot of the Gods Duesenberg Straight Eight". American Horsepower 100 Years of Great Car Engines. St. Paul, MN USA: Motorbooks. pp. 49–54.
    LCCN 2006017040
    . Retrieved 2014-01-11.
  • ISBN 0-600-39155-8
    .
  • Robson, Graham (2001). "Duesenberg Model A". The Illustrated Directory of Classic Cars. St. Paul, MN USA: MBI Publishing. pp. 180–181.
    ISBN 0-7603-1049-1
    . Retrieved 2014-01-11.
  • ISBN 0-7064-0058-5
    .
  • Vance, Bill (15 April 2005). "Motoring Memories: Duesenberg Model A". Autos.ca. Trader. Archived from the original on 20 January 2014. Retrieved 19 January 2014.

External links

Retrieved from "https://en.wikipedia.org/w/index.php?title=Duesenberg_Model_A&oldid=1207854423"