Rotary Trebuchet System

Intro

In the context of a project carried out at the MakerSpace of UniLaSalle Amiens, we designed, prototyped, and built a mini siege machine intended to participate in a competitive game. The objective of this challenge is to score as many points as possible by accurately aiming at specific game elements using a mechanical launching system.

For more information about the Medieval Challenge :

[https://makerspace-amiens.fr/medieval-challenge](https://makerspace-amiens.fr/medieval-challenge)

This project focuses on the design and construction of a Rotary Trebuchet System, a compact siege engine inspired by medieval mechanisms and adapted to modern prototyping methods. The video presents a complete assembly and build montage, showing each step of the construction process, from individual components to the final operational system.

Throughout the video, the mechanical structure, rotation axis, fastening system, and launching mechanism are explained in detail. The goal is to provide a clear understanding of how the different parts interact and how engineering principles such as rotation, energy storage, and motion transfer are applied in this design.

🎥 Assembly / Build montage video :

🧰 Required parts & supplies :

• 25 cm elastic band

• M3 flat head screws (M3 FHC x16) ×3 + M3 nuts

• M4 socket head screw (M4 CHC x30) + lock nut

• M5 socket head screw (M5 CHC x40)

• M5 partially threaded socket head screw (M5 PT CHC x20) + nut

• M6 socket head screw (M6 CHC x20)

• M6 socket head screw (M6 CHC x50)

• 50 cm of string

This video is intended for educational and demonstration purposes and highlights the use of rapid prototyping, mechanical design, and hands-on experimentation within a MakerSpace environment.

Thank you for watching and supporting our project !