This project is a detailed Fusion 360 (.f3z) functional model of a helicopter’s Main Gearbox (MGB). It is designed specifically for educational purposes and mechanical simulation to demonstrate how power is distributed from a single engine input to both the main rotor and the tail rotor.Mechanical Working PrincipleThe model showcases the simultaneous operation of two different transmission types:Main Rotor Drive: A high-torque 6:1 Planetary Gear System reduces the high RPM from the input shaft to provide the necessary torque for the main rotor.Tail Rotor Drive: A Bevel Gear Set diverts power from the main axis to a secondary output shaft, simulating the high-speed drive required for a tail rotor.Technical Specifications:Planetary Gear Ratio: $6:1$ ReductionSun Gear: 12 TeethPlanet Gears: 24 Teeth (x3)Ring Gear: 60 TeethCAD Format: Distributed Fusion 360 Design (.f3z)Note for Users (Simulation):This upload is intended as a kinematic study rather than a 3D-printable kit. To see the mechanism in action:Open the .f3z file in Autodesk Fusion 360.The model includes pre-configured Revolute Joints and Motion Links.Rotate the input "Sun Gear" or the "Main Shaft" to observe the synchronized movement of the planetary carrier and the tail rotor output.The assembly uses a modular housing (chassis) design to prevent joint conflicts and ensure smooth rotation.About the Project:This model was developed by a 10th-grade engineering student with a focus on defense industry production technologies and autonomous platforms. It serves as a proof-of-concept for complex mechanical transmissions and power management in aerospace engineering.

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