The growing deployment of microjet-powered unmanned aerial vehicles requires integrated control strategies that account for the tight coupling between propulsion system, flight dynamics, and onboard energy management. While adaptive and model-predictive control approaches show promise in the literature, their validation remains constrained by limited access to physical test facilities and the high cost of iterative hardware modifications. This paper presents a digital control testbench implemented within the Engine Mission Simulation System (EMSS), a cosimulation framework that couples NPSS-based engine thermodynamics with X-Plane flight mechanics through a Simulink interface. The modular architecture enables time-synchronized analysis of engine transients under realistic flight conditions, providing a low-cost environment for rapid controller development and validation. A micro-turbojet model of the Aero Design Works B300 engine is validated against experimental data from ground-test campaigns, demonstrating accurate representation of transient rotor dynamics, compressor working-line evolution, and surge-margin excursions during throttle ramps. Deviations between steady-state and transient simulations highlight the necessity of dynamic modeling for control-system evaluation, particularly during rapid acceleration where surge margins reduce significantly below quasi-static predictions. The presented framework supports both standalone controller verification against recorded engine data and mission-integrated assessments, positioning EMSS as a practical tool for advancing control strategies in the microjet domain prior to hardware-in-the-loop testing and flight trials.     «

The growing deployment of microjet-powered unmanned aerial vehicles requires integrated control strategies that account for the tight coupling between propulsion system, flight dynamics, and onboard energy management. While adaptive and model-predictive control approaches show promise in the literature, their validation remains constrained by limited access to physical test facilities and the high cost of iterative hardware modifications. This paper presents a digital control testbench implement...     »