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