After watching some videos of small aircraft fitted with Corolla engines, it seems like trying a similar approach with a Prius engine wouldn't be impossible. But anyway, I'd only hold my breath for hybrid aircraft to become mainstream as long as they're fitted with a propeller (either piston-engined or turboprop), or the fan is so massive that it requires a reduction gearbox in order to prevent the tips of the blades to break the barrier of sound.
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