Hybrid electric propulsion systems test aircraft (HEPSTA)
Fuel cell systems provide a zero-emission solution for aircraft propulsion. To assure safe and reliable fuel cell operation in aircraft, system testing has to be conducted under realistic operating conditions. Therefore the HESPTA has been developed as a flying testbed to provide a system carrier for time- and cost-effective airborne fuel cell system testing. In this keynote presentation the test platform HEPSTA will be described with the new fuel cell system generation and latest results, comprising laboratory measurements and insights on the system design, especially focusing on the concept of hybridization for power optimization and system reliability.