New GE H75-A Features Single-Lever Electronic Engine And Propeller Control On 4 December 2020, Diamond Aircraft’s DART-550 performed its first flight with the new fully aerobatic GE Aviation H75-A engine at Wiener Neustadt East Airport (LOAN) in Austria. This new turboprop engine is the first aerobatic engine developed by GE Aviation at its Turboprop headquarters in the Czech Republic to provide 550shp for the next generation of aerobatic turboprop training aircraft. After an extensive testing campaign inside the propeller and dyno test cells at the GE Aviation Czech, the new GE H75-A is set to undergo several flight and aerobatic tests on board the brand-new DART-550 that has already been flying with the modified standard H75 engine.