DeltaHawk took a really long time to get the FAA certification. Truth be told, I would rather rely on a gear-driven blower for an aeronautic 2-stroke Diesel engine instead of the belt-driven one, even though it an automotive derivative of this engine would ever come to fruition the belt drive would allow for a variable-speed compressor to act like an EGR somehow. And since it relies on unit-injectors, wouldn't be rocket science to fit an electronically-controlled setup for compliance to regulations that a modern truck would need to address.
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