Introduced at AirVenture 2009, it is powered by a Czech-built PBS TJ100 turbojet engine mounted above the aft fuselage, with the exhaust exiting between the Y-tail.

[citation needed] It was flight tested by jet-sailplane performer Bob Carlton in August 2011.

The landing gear was changed to a fully retractable, pneumatically-operated tricycle configuration.

[11][12] In August 2024, two JSX-2s were used by the Michigan Air National Guard as "cruise missile threat replication aircraft" and drones during Exercise Northern Strike.

[13][14][15][16][17] Data from Sonex Aircraft[26] and AINonline[21]General characteristics Performance Avionics