This study investigates hybrid propulsion for UAM & AAM as demand shifts toward short-range urban and suburban mobility enabled by advances in lightweight aircraft technologies. Urban low-altitude operations with frequent takeoffs and landings under stricter noise regulations require both high propulsion efficiency and low acoustic emissions. While electric propulsion provides precise controllability and low vibration, limitations in battery energy density and charging infrastructure constrain range, endurance, and turnaround. Hybrid propulsion can mitigate these constraints by combining the high energy density of fuel with the motor’s low-noise, fast-response operation. Accordingly, this study quantitatively compares thrust performance and noise spectra of an identical propeller when driven by an electric motor versus an internal combustion engine, providing baseline evidence to support hybrid propulsion system design.

Abstract
1. 서 론
2. 본 론
    2.1 프로펠러 선정기준
    2.2 프로펠러 소음
    2.3 항공기 소음규정
3. 실험 및 해석
    3.1 실험 방법
    3.2 실험 결과
4. 결 론
후 기
References

• 김재필(Kyungwoon University of Aero Mechanical Engineering, Professor) | Jae-Pil Kim
• 권혁(Kyungwoon University of Aero Mechanical Engineering, Professor) | Hyuk Kwun Corresponding author