This project focuses on designing a lightweight, portable quadcopter for fun and learning. The frame uses a truss-structured arm design that minimizes material but maintains rigidity. Four brushless motors with propellers provide balanced lift and stability. The central housing accommodates the flight controller, ESCs, battery, and sensors in a modular way, making assembly and maintenance simple.

Its compact size makes it ideal for indoor use and short outdoor flights. The drone can also be upgraded with add-ons like a small FPV camera, sensor modules, or light payloads, making it both recreational and educational.

🔗 3D Model: Compact Drone Design on GrabCAD

Step-by-Step Build Tutorial

1. Frame Assembly

   • 3D-print or build the truss-structured frame.

   • Attach motor mounts securely on each arm.

2. Motors & Propellers

   • Fix 4 brushless motors to the frame.

   • Mount propellers (2 clockwise, 2 counter-clockwise).

3. Electronics Setup

   • Place the flight controller at the center.

   • Install ESCs close to each motor.

   • Add Li-Po battery and secure with strap.

4. Wiring & Connections

   • Connect motors → ESCs → flight controller.

   • Attach battery and radio receiver.

   • Keep wiring neat to reduce vibration.

5. Calibration

   • Configure ESCs and motor direction.

   • Calibrate gyroscope and accelerometer.

   • Balance propellers for smooth flight.

6. Testing

   • Perform low-throttle hover indoors.

   • Tune PID settings for stability.

   • Test outdoors in safe open areas.

7. Upgrades

   • Add FPV camera for live view.

   • Mount sensors or small payloads.

   • Customize the frame for experiments.