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Hall-Scott was founded in 1910 by E. Hall and B. Scott in Berkeley, California. The company was among the most significant builders of water-cooled aircraft engines prior to World War I in the USA.


Hall-Scott was founded in 1910 by Elbert J. Hall and Bert C. Scott, initially to produce powered passenger rail cars. Hall-Scott aero engine production also began in 1910.

Shortly after WW I, Hall-Scott dropped its aero engine and rail car product lines. The firm produced several hundred thousand two-speed rear axles for the Model T, the "Ruckstell Axle", through the mid-1920s. American Car and Foundry purchased Hall-Scott in 1925 and used its engines in its buses and boats.

In 1931, one of the firm's most famous and important products, the Invader, a marine engine, entered production. The company attained its highest production and employment numbers in World War II, building engines for a variety of military boats and a tank retriever. Hall-Scott engines were used in some Higgins Boats, the LCVP. Some post WWII ACF-Brill busses used by Greyhound and Trailways, used Hall-Scott engines.

ACF divested itself of Hall-Scott in 1954, and the division was purchased by Hercules Motors in 1958.

The final products bearing the Hall-Scott name were produced by Hercules in the late 1960s.

Select Products

  • Hall-Scott A-2 (V-8 aero engine)
  • Hall-Scott A-3 (V-8 aero engine)
  • Hall-Scott A-5 (straight-6 aero engine, OHC)
  • Hall-Scott L-6
  • Hall-Scott A-7 (straight-4 aero engine, OHC)
  • Hall-Scott Invader (straight-6 marine engine, OHC)
  • Hall-Scott Defender (V-12 marine engine, OHC)
  • Hall-Scott 400 (straight-6, truck engine, OHC)
  • Hall-Scott 440 (variant of the 400)
  • Hall-Scott 590 (straight-6, truck & bus engine, OHC)

See also


  • Bradford, Francis & Ric Dias, "Hall-Scott; The Untold Story of a Great American Engine Maker" (SAE, Int'l: Warrendale, 2007)
  • Dias, Ric. Hall Scott
  • Gunston, Bill, World Encyclopaedia of Aero Engines (Patrick Stephens: Wellingborough, 1983), p.73

External links

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