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Standard SJ

From PlaneSpottingWorld, for aviation fans everywhere

The Standard SJ was an early American Army trainer, introduced in 1916.

Built by the Standard Aircraft Corporation, and intended to work with the Curtiss JN-4, the SJ was an open-cockpit tractor biplane, powered by a 100 hp (75 kW) Hall-Scott inline engine. It was followed by the J-1 (or SJ-1), which were only slightly different.

Like the Standard H-2, H-3, and H-4H, the SJs were hampered by the poor Hall-Scott engines. Despite this, some 800 SJs and SJ-1s were built in all.

Due to the engine troubles, Standard produced the JR', which was very similar to the SJ, but fitted with a 175 hp (130 kW) Wright-Hispano engine; the Army bought only six, as advanced trainers. Additional changes were made, including a new tail, equal-span wings, and a 175 hp (130 kW) Hall-Scott, leading to the JR-1B; the Army bought six, and the Post Office several.

Specifications (SJ)

General characteristics

  • Crew: 3
  • Length: ()
  • Wingspan: ()
  • Height: ()
  • Powerplant:Hall-Scott A-5 , 125 hp (90 kW)



  • Guns:


  • Donald, David, ed. Encyclopedia of World Aircraft, p.854, "Standard aircraft". Etobicoke, Ontario: Prospero Books, 1997.


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