While we wait (with increasing patience or impatience depending on our personalities) for the next round of battery developments to make pure electric airplanes a reality, hybrid possibilities abound. The definition of “hybrid” might not be as coherent as those used for automobiles. Some “hybrids in this entry allow extended letdowns following a primary engine failure. In that case, the added electric motor/generator gives extra minutes to find a safe landing space. While both motor and primary engine are operational, the system acts much like an automotive hybrid system, both motor and engine combining outputs for added power, or the electrical portion recharging batteries while the engine maintains cruise power. Some are more like automotive serial systems, an engine-driven generator charging batteries which power the propulsion motor. Pipistrel, though the Hypstair project, has a 200-kilowatt (268-horsepower) unit ready for test flights in 2017, according to Tine Tomazic, Director of Research and Development. Several Flying Now Several years ago, Flight Design …
EAS VIII: Pipistrel’s Certifiable Hybrid Aircraft
No hype, Pipistrel’s Hypstair (hipster) was introduced by Tine Tomazic and Gregor Veble at this year’s Electric Aircraft Symposium. The attempt to bring the world’s first certified hybrid aircraft to market is a joint venture by Pipistrel with partners Siemens, the University of Maribor, the University of Pisa and MB Vision, a specialist in providing visual information. Siemens, as might be imagined, is providing an “ultra-light weight integrated drive train” for the aircraft,” Slovenia’s University of Maribor the HIL (hardware in the loop) evaluation for electric motor control testing and dynamic emulation of mechanical loads, Italy’s University of Pisa for evaluation of hybrid technology advantages, and MB Vision for development and integration of the aircraft’s interior and human machine interfaces that will make the information presented to the pilot ideally selected and intuitively perceived. Far removed from the days when homebuilt aircraft advocates drew a chalk outline of the steel tubing they would weld together on the garage floor, the …