Design of Hybrid Propulsion and Balance of Plant for Cessna 208

The repository contains three Jupyter notebooks and two power-profile datasets that implement the three-stage sizing framework. Combined_Interpolated_Data_208.csv is the main input dataset for Stage 1; it provides time-resolved propulsion power profiles for the Cessna 208, interpolated onto a common time grid. The notebook Init_Sizing_Stage1.ipynb uses this dataset to perform the initial sizing of the hybrid fuel-cell and battery powertrain based only on propulsion demand. Stage 2 is implemented in BoP_Sizing_Stage2.ipynb, which takes the initial capacities and adds balance-of-plant (BoP) and installation models to estimate additional power, mass, and volume requirements for auxiliary components. The worst-case power profile is stored in interp_extracted_points_power4_shaft.csv and used by the Stage 3 notebook, Final_Sizing_Stage3.ipynb, to compute the final capacities of the fuel cell, batteries, compressor, motor, and cooling system.