Page 143 - tech fest 2025 ב״ש חוברת תקצירים

Experimental System for Studying the “Weis-Fogh Mechanism”
ME-D-33
Matan Mor; mmor03@gmail.com
Advisors: Dr. Nir Trabelsi1, Prof. Gal Ribak2
1SCE - Shamoon College of Engineering, Be’er-Sheva 2Tel Aviv University, Tel Aviv
Drone technology advancements and market growth are driving small body aviation research. ‘Ornithopter’ (bird-like flight) mechanisms, which rely on flapping wings instead of rotating propellers, are drawing research attention. Wing movement profiles considerably affect flight speed, maneuverability, and efficiency.
A particular wing movement profile, “clap and fling,” where the wings meet above an insect’s body and then separate, was hypothesized by Weis-Fogh as contributing lift using the low air pressure region above the flying body generated by the separation of the wings.
This project is being conducted for the Biomechanics of Animal Movement Laboratory at Tel Aviv University. The goal is to develop a Weis-Fogh-type experimental system mimicking the “clap-and- fling” wing movement profile, while measuring relevant forces.Weis-Fogh mechanism.
Keywords: aviation, biomechanism, “clap and fling”, drones, Weis-Fogh mechanism
Advanced Portable Cooler for Medical Blood Transfusions in I.D.F. Combat Zones
ME-D-34
Ishai Haziza; ishai.haziza@gmail.com Elior Lagziel; 12eliorlagziel@gmail.com
Advisor: Dr. Nir Trabelsi
SCE - Shamoon College of Engineering, Be’er-Sheva
This project presents the design of a compact and portable cooling system for preserving blood units at 2–6°C in field combat scenarios. The system comprises a ‘thermoelectric cooler’ (TEC), cooling fins, fans, and a thermally insulated compartment made of polypropylene foam. All components are secured using a mechanical clamping system with pressure and screws. The enclosure was 3D-printed, and the system is powered by a standard military radio battery, enabling full mobility. Thermal and airflow simulations were performed in “ANSYS” to optimize the heat sink configuration and air circulation. A working prototype was fabricated and tested under simulated field conditions. Our project presents a functional prototype and initial experimental results that validate the system’s thermal performance and operational feasibility.
Keywords: battlefield medicine, operational feasibility, prototype, thermoelectric cooler
Book of Abstracts | 2025
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