UROP Proceedings 2020-21

School of Engineering Department of Mechanical and Aerospace Engineering 179 Aircraft Design and Air Transportation Operations: How do they Affect Each Other? Supervisor: LIEM Rhea Patricia / MAE Student: CHAVANACHINDA Phisitchai / MEGBM Course: UROP2100, Spring With the increasing range of newer aircraft, flights are becoming longer and farther than ever before. It is a common practice for pilots to plan step climbs in long-haul flights in order to maximize the fuel efficiencies and the take-off weight. This study aims to analyze different flight mission profiles of short, medium, and long-haul flights, to examine the correlation between the number of step climbs, the take-off weight, and the respective fuel efficiencies, and to identify the suitable flight trajectory and planning. The results show that increasing the number of step climbs on long-haul flights can improve the fuel efficiency during the cruise segment. This paper helps to develop an understanding of the links between aircraft design and air transportation operations. Aircraft Design and Air Transportation Operations: How do they Affect Each Other? Supervisor: LIEM Rhea Patricia / MAE Student: YIU Kwan Ho / AE Course: UROP2100, Spring For economical and environmental reasons, the aviation industry urges the even more fuel-efficient aircraft operation. Studying about how operational factors affect fuel efficiency, the optimum conditions for air transport can be predicted. This study focuses on two operational factors only, the number of step climb and TOW. The research results find the more step climb ensures aircraft operate at the optimum altitude and the higher TOW results in lower fuel burnoff per weight. For the sake of fuel efficiency improvement, aircraft should perform frequent step climb to reach the optimum altitude and carry the higher payload. Study of Flapping Fins of a Bio-inspired Manta Ray Robot Supervisor: QIU Huihe / MAE Student: HO Ka Ying / MAE Course: UROP1100, Fall The flapping motion of the manta ray has always been a research interest since manta ray is considered to swim with high efficiency. Its efficiency is largely related to it’s the flexibility of its fin and its swimming mechanism involves twisting in both spanwise and chord wise direction, and it is also related to wake resonant theory, which is very different from the mechanism we have for current underwater vehicle. Many studies have been done to unveil manta ray’s swimming secret. This report will give a brief summary of the kinematics of manta ray’s flapping motion (dorsoventral oscillation), introduce some inspired designs of manta ray robots and some thoughts for future study.

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