Diesels offer these advantages over conventional spark ignition engines:
The engines have around half the specific weight, half the frontal area and burn less fuel. This leads to remarkable improvements of aircraft parameters: payload, range and speed will be markedly better.
Environmentally friendly, low CO2 emissions due to low fuel consumption, low NOx due to two stroke principle, low soot and unburned hydrocarbon emissions due to modern high pressure injection. Diesel and jet fuels contain no toxic substances like lead, benzene or scavengers.
Very low noise emission due to two-stroke and turbocharging. · No electromagnetic interference.
Very low vibration level. Torque vibration is minimal due to one power pulse per cylinder per revolution.
Greatly reduced fuel costs - engine burns fewer Ib/hp hr; diesel or jet fuel has more Ib/gallon and costs less per gallon.
Easy to operate - one power lever only. No mixture, no alternate air. no aux fuel pump, no magneto switches, no mandatory temperature, boost or power restrictions.
Good reliability and low maintenance cost due to the lack of a reduction drive, the very low parts count and the use of reliable diesel components.
High inflight reliability - no carburetor-icing, no magneto or spark-plug problems, no vapor lock. Turbine inlet temperature is so low that it needs no monitoring. Even cylinder head temperatures are not critical.
Reduced 'hot and high' problems - sea level power at least up to 9,0