In this mini project, I analyzed the structural behavior of wing spar concepts to understand how geometry and material choice influence deflection, stress, and overall design feasibility. I modeled two cross-sections: an I-beam and a hollow square, and evaluated each using steel, 2024 aluminum, and titanium alloys. My work included building the CAD models, setting up the FEA simulations, and adjusting dimensions to meet the required deflection target. I began with a simplified uniform lift model and later incorporated a more realistic triangular distributed load with a concentrated engine weight, which revealed how complex loading drives significantly different design decisions. Although brief, this project further solidified my understanding of real-world engineering applications and the importance of material selection, mass, and manufacturability.