Thrusters play a crucial role in the evolution of aircraft through the different phases of flight. This has led manufacturers to improve engine power in order to bring more efficient products to market that are both quieter and less polluting.In our study, we have developed a calculation code to study the performance of a turboprop engine according to the real cycle and also in non-adaptive mode.The engine will have to operate in a wide range of conditions in terms of Mach number, altitude and rpm. The geometry will then impose, apart from adaptation, constraints which do not exist at the level of the calculation of the initial cycle.The DART 536-7R engine was used as a reference for the application of the developed code.