The 1917 Standard JR-1 and -1B were two-place Army advanced trainer, but boldly referred to by the company as “Pursuit”. They were revised J-1/SR-1 with a 175hp Hall-Scott A-5 engine in the JR-1, and 150hp Wright-Hisso A in the JR-1B.
Six JR-1 were built; AS25804, and 34225 to 34229, and six went to the US Mail Service in 1918 as JR-1B with 150hp Wright-Hisso A engine (AS42111 to 42116).
The 1918 Standard E-4 were redesignated JR-1B as a post-war single-place mail plane with a 150hp Wright-Hispano A and a longer top wing.
JR-1
Engine: 175hp Hall-Scott A-5
Useful load: 546 lb
Seats: 2
JR-1B
Engine: 150hp Wright-Hisso A
Speed: 90 mph
Seats: 2
E-4
Engine: 150hp Wright-Hispano A
All Aero 