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Hi friends,

Im a student engineer and im working on a project to build a tactical UAV. According to the datasheet the MTOW is about 450 kg, the range is between:150-300 km, and my primary study shows that the cruise speed is around 130 km/hour while the absolute ceiling is 6000 m. Any suggestion , advice about what will be the appropriate propulsion system or its characteristics please ? (weight of dry engine shouldn't highly exceed  20 kg) 

Thanks in advance!