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Jeffery Quad

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Jeffery Quad
U.S. Marines riding in a Jeffery Quad,
FortSanto Domingo,c. 1916
Overview
ManufacturerThomas B. Jeffery Company
Nash Motorsafter 1916
Also calledNash Quad
Production1913–1928
Body and chassis
LayoutFront-engine, four-wheel-drive
Powertrain
EngineBuda,312 cu in (5.1 L) side-valve 4-cylinder, 28 hp (21 kW; 28 PS)
Transmissionfour-speed, four wheel drive, hub-reduction gearing
Dimensions
Length200 in (5,080 mm)
Width74 in (1,880 mm)
Height85.5 in (2,172 mm) without canopy
Curb weight5,350 lb (2,427 kg)
Payload = 3,000 lb (1,361 kg)

TheJeffery Quad,also known as theNash QuadorQuadis afour-wheel drive,11⁄2-ton ratedtruckthat was developed and built by theThomas B. Jeffery Companyfrom 1913 inKenosha, Wisconsin,and after 1916 byNash Motors,which acquired the Jeffery Company. Production of the Quad continued unchanged through 1928.

The Quad introduced numerous engineering innovations. Its design and durability proved effective in traversing the muddy, rough, and unpaved roads of the times. The Quad also became one of the most successful vehicles inWorld War I.The Quad was produced in large numbers by Jeffery and Nash, as well as under license by other truck makers.

Development

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TheUnited States Armyneeded to replace the four-muleteams used to haul standard one-and-a-half-ton loads with a truck andrequested proposalsin late 1912.[1]

The company began development by purchasing and examining a newFour Wheel Drive Auto Company(FWD) truck, but found it to be unacceptable and sold the vehicle to begin their own design from scratch.[1]By July 1913, Jeffery company had their 3,000 lb (1,361 kg) capacity truck ready for public demonstration of its capabilities.[1]

The Jeffery designed a four-wheel-drive truck, known as the "Quad" or "Jeffery Quad" greatly assisted the subsequent efforts duringWorld War Iby several Allied nations, particularly the French.[2]The Jeffery Quad became the workhorse of the Allied Expeditionary Force.[3]

These unique vehicles also saw heavy service underGeneral John J. "Blackjack" Pershingas both theJeffery armored carand as regular transports during the Army's 1916Punitive Expeditionthrough Mexico; Quads were also used extensively during Pershing's later European campaigns of World War I.[4]TheUnited States Marine Corpsalso adopted the Jeffery Quad, using it in theoccupation of Haiti,and of theDominican Republic,from 1915 through 1917.[5]

At least 11,500 Jeffery and Nash Quads were built between 1913 and 1919. In 1918 alone, Nash built 11,490 of its Quads, a world record at the time.[6]

"Four-wheel drive trucks had been built before... but aside from the Jeffery Quad (Nash Quad, per subsequent purchase) earlier designs were inefficient, crude, and flimsy."[7]

Design

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Initially called theRambler Quadruplefor its car-derived 281.4 cu in (4.6 L) Rambler four-cylinder that produced 21 hp (16 kW; 21 PS).[1]Development called for a switch to aBudamanufactured 312 cu in (5.1 L) side-valve four-cylinder engine that was rated at 28 hp (21 kW; 28 PS), but actually producing 52 hp (39 kW; 53 PS) at 1,800 rpm.[1]

The Quad hadfour-wheel driveandfour-wheel brakes,as well as an innovativefour-wheel steeringsystem.[8]This novel approach to steering allowed the rear wheels to track the front wheels around turns, such that the rear wheels did not have to dig new "ruts" on muddy curves because most roads of the day were unpaved and often badly rutted.

This four-wheel steering mechanism was integrated with Muehllimited-slip differentialson both the front and rear axles.[9]

From the transfer case, shafts led to the top of both the front and rear solidportal axlesgiving the trucks a very high ground clearance allowing it to drive through mud up to its hubcaps.[10]Engine power was transmitted by half-shafts with a u-joint and bearing that was connected by a pinion gear to each of the four wheels from the dual differentials that positioned parallel to but above the load-bearing "dead" axles.[11]This pinion gear then drove an internal toothed ring gear at each of the four wheels.[10]

The Quad's combination of innovative features constituted a revolutionary approach to four-wheel drive and allowed the truck to traverse soft and poor conditions with unprecedented effectiveness.

The Quad was fitted with aBorg & BeckClutch, providing excellent reliability for the enduring environment.[12]

Legacy

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The Quad was one of the first successful four-wheel drive vehicles ever to be made, and its production continued for 15 years with a total of 41,674 units made.[13]Concurrently with the Quad's production, the company expanded its truck line by building conventional 1.5 ton trucks with double chain rear-wheel drive.[10]

The Quads ability to traverse terrain across the globe that challenged modern trucks meant civilians used their slow, but unstoppable work at least until the 1950s.[1]

In 1954, Nash Motors merged withHudson Motor Car Companyto formAmerican Motors Corporation(AMC), which acquired the vehicle operations ofKaiser Jeepin 1974 to complement its passenger car lines, later including the AWD/4WDAMC Eagle.The combined automaker's ancestry reached back to the famed World War I "Quad".[14]

Notes

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  1. ^abcdefAdolphus, David Traver (August 2011)."Where none could possibly travel Jeffery's Quads became the backbone of both commerce and war".Hemmings Classic Car.Retrieved4 March2018.
  2. ^Shrapnell-Smith, Edmund (1915).Our Despatches from the Front: Huge Deliveries of Lorries for the French Government. Drivers for Quads. American Tire Sizes,inThe Commercial Motor.Temple Press (since 2011, Road Transport Media). p. 229.Retrieved6 December2014.
  3. ^"Charles Thomas Jeffery".The Lusitania Resource. 25 July 2011.Retrieved6 December2014.
  4. ^Hyde, Charles (2009).The Thomas B. Jeffery Company, 1902-1916,inStoried Independent Automakers.Wayne State University Press. pp. 1–20.ISBN978-0-8143-3446-1.Retrieved6 December2014.
  5. ^Buckner, David N. (1981). Marine Corps Historical Division (ed.).A Brief History of the 10th Marines(PDF).Washington D.C.: United States Marine Corps. 19000308400.Retrieved3 March2018.
  6. ^Baldwin, Nick (2010).Lorries: 1890s to 1970s,Shire Library.Bloomsbury Publishing.p. 12.ISBN978-0-7478-1188-6.Retrieved14 September2021.
  7. ^Mroz, Albert (2009).American Military Vehicles of World War I: An Illustrated History of Armored Cars, Staff Cars, Motorcycles, Ambulances, Trucks, Tractors and Tanks.McFarland. p.19.ISBN978-0-7864-3960-7.
  8. ^Eckermann, Erik (2001).World history of the automobile.Society of Automotive Engineers.ISBN978-0-7680-0800-5.
  9. ^Sturmey, Henry (1915).The Muehl Differential, An Automatic Lock,inThe Commercial Motor.Temple Press (since 2011, Road Transport Media). p. 208.Retrieved3 December2014.
  10. ^abc"The Four-Wheel-Drive Jeffery Quad, Built in Kenosha, Wisconsin".The Old Motor. 10 February 2013.Retrieved4 March2018.
  11. ^Shrapnell-Smith, Edmund (1915).The Jeffery Quad. Steers, Brakes and Drives on All Four Wheels -- A Self-locking Differential,inThe Commercial Motor.Temple Press (since 2011, Road Transport Media). pp. 206–7.Retrieved6 December2014.
  12. ^Casey, Robert J. (1948).Mr. Clutch; the story of George William Borg.Indianapolis: The Bobbs-Merrill Co.
  13. ^Redgap, Curtis; Watson, Bill (2010)."The Jefferys Quad and Nash Quad — 4x4 Ancestor to the Willys Jeep".Allpar.Retrieved6 December2014.
  14. ^Wisconsin Beautiful: Official Handbook.Country Beautiful Foundation. 1966.Retrieved4 March2018.companies traced their ancestry back to wagons, carriages, wooden iceboxes, bicycles, the famed World War I 4-wheel drive Quad.
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