Servo Driven Payload Release Mechanism Device with Servo Arm

Specifications:

• Material: High-strength Aluminum Alloy
• Payload Capacity: 4kg to 6kg
• Servo Compatibility: Standard 25T Spline (MG995, MG996R, MG946R, MG945, S3003)
• Mechanism Type: Sliding Pin Release
• Overall Weight: 36g
• Torque Requirement (Servo): Minimum 6kg-cm recommended
• Application: RC Helicopters, Multicopters, Fixed-wing Aircraft, RC Boats, and RC Trucks

Unlock New Capabilities

• If you've already experimented with... If you've already experimented with basic servo control on an Arduino or successfully built and piloted a standard RC vehicle, you already understand PWM signals — which means you're perfectly ready to add payload delivery to your next build.
• This Payload Release Mechanism unlocks... This dropping device unlocks aerial delivery for custom drones, automated bait-dropping mechanisms for RC fishing boats, and precision deployment systems for ground rovers. These are mechanical builds you simply cannot achieve reliably with DIY zip-tie or 3D-printed clip solutions.
• Effort Level & Minimum Hardware
• Effort Level: Beginner

Minimum hardware to get started:

• Standard 25T Servo (e.g., MG996R or MG995): the release mechanism requires a servo to actually drive the sliding pin.
• Microcontroller or RC Receiver: to send the PWM trigger signal to the servo.
• Dedicated 5V/6V Power Supply or BEC: high-torque standard servos can draw over 2A under load and will cause your microcontroller to reset if powered directly from the board.

Package Includes:

• 1 X Servo Driven Payload Release Mechanism Device with Servo Arm.

Frequently Asked Questions

• Is this release mechanism compatible with an SG90 micro servo?
  No, it is specifically designed with a 25T spline mount for standard-sized servos like the MG995, MG996R, and S3003.
• Can I mount this on any drone frame?
  Yes, the aluminum bracket features multiple pre-drilled holes, allowing it to be bolted to most custom carbon fiber or aluminum RC frames.
• Does this work with fixed-wing RC planes?
  Yes, it can be mounted to the underside of planes, helicopters, and RC boats for dropping payloads or bait.
• Will a 3D printed arm work instead of the included aluminum arm?
  While possible, 3D printed arms are highly prone to snapping under the 4-6kg tension this mechanism is designed to handle.
• How much power does the dropping mechanism require?
  The mechanism itself is purely mechanical; the power requirement depends entirely on the standard servo you install (typically 4.8V to 7.2V).
• Can I power the attached servo directly from my flight controller?
  No, standard servos pulling 4-6kg payloads will draw stall currents exceeding 2A, which will burn out a standard flight controller BEC.
• What is the recommended power supply for reliable drops?
  You should use a dedicated high-current 5V/6V UBEC (Universal Battery Eliminator Circuit) capable of supplying at least 3 Amps.
• How do I connect the servo to a standard RC receiver?
  Plug the 3-pin servo cable directly into an available auxiliary channel (e.g., CH5 or CH6) on your RC receiver.
• How do I trigger the mechanism using an Arduino?
  Connect the servo's signal wire (usually yellow or orange) to a PWM-capable digital pin on the Arduino and use the Servo.h library.
• Do I need a logic level shifter for a 3.3V flight controller?
  Most standard servos will accept a 3.3V PWM signal on the control line, but always power the servo from an independent 5V/6V source.
• Which Arduino library is needed to operate the sliding pin?
  The standard #include <Servo.h> library built into the Arduino IDE is all you need to sweep the arm.
• Is there specific code for Betaflight or Ardupilot?
  In Ardupilot, you configure a SERVOx_FUNCTION to map an RC switch to the servo output; no custom code is required, just parameter configuration.