Quote:
Originally Posted by RustyLugNut
Orbital of Australia has an engine in development to replace the engines in military drones. This would remove the last need for aviation gasoline from the United States Military Logistics.
A balanced engine would have direct injection to provide an early injection event that introduces a sub critical amount of fuel (below combustible limits) followed by an injection closer to spark initiation.
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If you want to use spark ignition you definitely can't run anywhere near original power because the rich area right where the injector is spraying will ignite. Otherwise you'd be running a diesel cycle on a gas engine and that could be very bad for an injector not designed to do that or the reciprocating assembly, and you might lose a lot of efficiency.
Use a diesel engine for diesel.