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Piper displays DeltaHawk-powered Seminole DX at Oshkosh

Summary by aerotime.aero
Piper Aircraft is displaying the first flying prototype of its DeltaHawk-powered Seminole DX at EAA AirVenture Oshkosh 2026, less than three weeks after the diesel twin made its first flight.  The development aircraft is powered by two FAA-certified DeltaHawk DHK4A180 engines, each producing 180 horsepower and burning Jet A or Jet A-1. DeltaHawk said the aircraft is now undergoing flight testing as the companies expand the flight envelope and co…

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aerotime.aero broke the news on Monday, July 20, 2026.
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