Chalmers University of Technology investigated the concept of pre-cooled cores with pulsed detonation combustion (PDC). The engine core is developed to power a counter-rotating open-rotor propulsor that includes a novel Boxprop design in the front rotor. Pre-cooling the core flow before detonation combustion, improves the volumetric efficiency, allows for increased combustion pressure ratios, reduces the risk of pre-ignition and reduces the engine cooling requirements. Such synergies outline a promising engine core concept that, combined with the innovative counter-rotating Boxprop design, will result in a quieter propulsion unit delivering significant improvements in performance and fuel burn. The engine concept, featuring year 2050 technology, is optimized for a typical intra-European missions and matured to TRL2.