The Stemme ASP S15 is a German two-seat powered sailplane designed and built by Stemme for use as an Airborne Systems Platform.

The ASP S15 is a two-seat single-engined, all composite construction, powered sailplane with the engine mounted in the center fuselage.

[1] It has a shoulder wing, a conventional T-tail and a retractable nose wheel landing gear.

[1] It can also be fitted with a 2-axis autopilot and external underwing payload pods.

[1] The ASP S15-1 was granted a restricted type certificate by the European Aviation Safety Agency in October 2013.