Expertise and experience

EASA CS 22 / CS 23 aircraft, components and systems:

Sustainable Propulsion Systems:
  • Unique three-blade retractable propeller
  • Pure electric propulsion systems
  • Electric-hybrid propulsion systems – range extender with various engines, such as rotary engines and turbines
  • Power-to-Liquid propulsion
  • Fuel cell propulsion systems


Lightweight and Composites:
  • Design, development and engineering as well as manufacturing of composite aircraft
  • Prototyping – building and testing
  • Certification of aircraft according to CS22 and CS23
  • Set-up of production processes
  • Manufacturing processes, especially modern fibre composite manufacturing processes, including PrePreg construction (out-of-autoclave)
Research projects:
  • PROVING (LUFO programme) – objective: the development, validation and verification of a streamlined, robust verification and certification framework for aeronautical structural components
  • ELAPSED (cooperation agreement with the Bundeswehr University of Munich) – objective: an interdisciplinary approach to the development and evaluation of electric drive trains with a focus on sustainable, efficient and safe operation  project description
  • RPAS  – objective: the implementation and certification of a Remotly Piloted Aircraft System (RPAS) . is carried by it’s strong and highly competent team

  • Always searching for future-oriented innovations.
  • Open to developing customer specific solutions, of course.
  • Enthusiastically making the most of the competences of Approved Design Organisation, Production Organisation und Combined Airworthiness Organisation – CAO.


About us

Reiner Stemme’s new company: who were are and what we intend at

look at our projects is working on the prototype for the high-performance motor glider elfin. More projects are started and even more in the pipeline – not only for recreational purposes.