It was introduced at AERO Friedrichshafen in April 2015, shortly after its first flight.

[3] Based in the Stemme S10, the Stemme S12 features a cantilever wing, a T-tail, a two-seats-in-side-by-side configuration enclosed cockpit under a bubble canopy and a single engine with a retractable propeller.

Its 25 m (82.0 ft) span wing employs winglets.

The mid-fuselage-mounted engine is the 115 hp (86 kW) Rotax 914 F2/S1 four-stroke turbocharged powerplant driving a retractable, folding, variable-pitch propeller.

[3] The $8 million Dzyne Unmanned Long-Endurance Tactical Reconnaissance Aircraft (ULTRA) is an uncrewed derivative deployed as part of an affordable ultra-long endurance ISR demonstration, capable of flights up to 80 hours.