Interactional aerodynamic phenomena are expected to play an important role in conception, design and optimization of eVTOL configurations. Prediction of the complex three-dimensional and unsteady flowfield generated by the main rotary wings system (propellers, rotors) with other components of the eVTOL vehicle (wing, fuselage etc.) is critical for prediction of overall performance, stability and noise generation as a function of flight conditions. This paper focuses on breaking down these complex mechanisms and focusing on the simplest aerodynamic terms and their individual contribution to noise. The paper describes preliminary work done to explore the contribution of unsteady aerodynamic components to propeller-wing interaction noise for low tip-speed propellers. The Vortex Lattice Method in CHARM was partially validated against available propeller-wing wind tunnel data, with some modeling deficiencies identified. A historically unique case of noise measurements from the Vietnam-era YO-3A surveillance airplane is revisited and attempts were made to understand the unique trends of the experimental data presented in the report, while identifying the role of various components of the unsteady aerodynamics in low tip-speed propellers. This paper should be considered a progress report – more work needs to be done before final conclusions can be made.