Drone Servo Motor Airdrop System

SG90 Servo-Driven Payload Drop Mechanism for Drones (3D Printable)

This is a lightweight and minimalistic payload drop mechanism powered by a standard SG90 micro servo, designed for FPV drones and multirotors.
The entire system requires only one SG90 servo, a 20mm wide strap, and the screws included with the servo—making it extremely easy to assemble, repair, and customize.

Tested with small lightweight items such as water bottles, small supply packs, and markers. Perfect for DIY drone builders, demonstrations, and educational use.

✨ Features

🔩 Simple, durable, and lightweight

• All structural parts are fully 3D printable.
• No complex linkages—easy to build and very reliable.

⚙️ Direct-drive SG90 release mechanism

• The servo directly pulls the latch for quick and responsive release.
• Works with any RC AUX channel or flight controller output.

🧵 Universal 20mm strap mount

• Uses a 20mm wide fabric strap or Velcro band as the main attachment loop.
• Strap length is flexible—use any length depending on your payload.
• Allows mounting objects of various shapes and sizes.

📦 Required Parts (Minimal Setup)

• 1× SG90 Micro Servo
• 1× 20mm wide fabric strap / Velcro strap (any length)
• Servo arm screw (included with SG90)

👉 No additional hardware required!
The entire mechanism is: printed parts + servo + strap.

🛠 Installation

1. Mount the printed base to the bottom of your drone frame.
2. Insert and secure the SG90 servo using its included screws.
3. Thread the 20mm strap through the printed slots and wrap it around your payload.
4. Connect the servo to an AUX channel on your receiver or flight controller.
5. Test the open/close movement and adjust the servo angle if needed.

🧪 Recommended Print Settings

• Material: PLA or PETG
• Infill: 25–35%
• Wall count: 2–3
• Layer height: 0.2 mm

🎯 Use Cases

• Drone delivery demonstrations
• FPV fun missions
• STEAM / educational projects
• Light payload or marker drop tests
• DIY drone experiments