1. Introduction
This manual provides essential information for the assembly, use, and maintenance of your iFlight X-CLASS X413 ECO 13-inch or X415 15-inch Carbon Fibre FPV Frame Kit. These frame kits are designed for long-range FPV quadcopters and are compatible with the DJI O3 Air Unit System. The X413 and X415 frames are engineered for superior flight performance and feature robust arm construction, with the X413 ECO version specifically featuring a CNC-changed carbon plate for the camera side panel, replacing the standard side panel and tripod printed parts.
2. Specifications
2.1 X413 Frame Kit Specifications
| Feature | Detail |
|---|---|
| Product Name | X413 Frame Kit |
| Frame Wheelbase | 599mm |
| Frame Dimension | L425*W425*H26 mm |
| Arm Thickness | Carbon tube 20*20 mm |
| Top Plate Thickness | 3mm |
| Bottom Plate Thickness | 3mm |
| Max Flight Stack Height | 20mm |
| Max VTX Height | 20mm |
| Flight Stack Mounting | 35*35 Φ3mm |
| VTX Mounting | 20*20 Φ2mm / 25.5*25.5 Φ2mm / 30.5*30.5 Φ3mm |
| Motor Mounting | 30x30mm Φ4mm |
| Weight | 850 grams |
| Compatible Systems | HD O3 Air Unit/ BLITZ Whoop 5.8G 2.5W/ BLITZ Whoop 1.2G 1.6W |
2.2 X415 Frame Kit Specifications
Specific dimensions for the X415 15-inch FPV Frame Kit are not explicitly detailed in the provided information, but it shares the same design principles and high-quality carbon fiber construction as the X413, adapted for a larger 15-inch propeller size and longer-range applications.
3. Package Contents
Upon opening your iFlight X-CLASS FPV Frame Kit, please verify that all the following components are included:
- 1 x X413 Frame Kit (or X415 Frame Kit, depending on your order)
- 4 x Amass MT plug
- 1 x TPU Parts (for mounting and protection)
- 1 x Anti-slip Battery Pad
- 3 x Battery Strap
- 1 x Screw Bag (containing various fasteners for assembly)
If any items are missing or damaged, please contact your retailer immediately.
4. Assembly and Setup
The iFlight X-CLASS frame kits are designed for quick dismantling and robust construction. While specific step-by-step instructions are not provided, the general assembly process for an FPV frame kit involves mounting the core components to the carbon fiber structure.
4.1 General Assembly Steps
- Inspect Components: Before starting, carefully inspect all carbon fiber parts, screws, and TPU components for any defects or damage.
- Main Frame Assembly: Begin by assembling the main body of the frame, typically involving the bottom plate, top plate, and standoffs. Ensure all screws are tightened securely but do not overtighten to avoid stripping threads or cracking carbon fiber.
- Arm Installation: Attach the carbon tube arms to the main frame. The design allows for quick dismantling, suggesting a secure but potentially modular attachment mechanism.
- Motor Mounting: Mount your chosen motors to the motor mounting points on the arms (30x30mm Φ4mm). Use appropriate screws and ensure they do not protrude too far into the motor windings.
- Flight Stack Installation: Install your flight controller (FC) and electronic speed controller (ESC) stack onto the designated mounting points (35*35 Φ3mm). Use the provided TPU parts for vibration dampening if applicable.
- VTX Installation: Mount your video transmitter (VTX) to its designated area. The frame supports various VTX mounting patterns (20*20 Φ2mm / 25.5*25.5 Φ2mm / 30.5*30.5 Φ3mm).
- Camera Installation: For the X413 ECO, the camera side panel is a CNC-changed carbon plate. Mount your FPV camera securely to this plate.
- Battery Pad and Straps: Affix the anti-slip battery pad to the bottom plate where the battery will rest. Use the provided battery straps to secure the battery firmly.
- Amass MT Plugs: Solder the Amass MT plugs to your ESCs or power distribution board as required for battery connection.
4.2 Visual Reference
The following images provide various views of the assembled frame kits, which can serve as a visual guide during your build process.

This image shows the overall structure of the iFlight X413 frame kit, highlighting its robust carbon fiber construction and arm design.

A clear overhead view of the X413 frame, illustrating the layout of the main plate and arm attachment points.

This perspective shows the frame's profile and the integration of the arms with the central body.

A closer look at the frame's construction, revealing mounting points and structural details.

This image presents the larger X415 frame kit, designed for 15-inch propellers and extended flight times.

An overhead view of the X415 frame, showing its larger footprint compared to the X413.

This image demonstrates the quick dismantling feature, showing the X415 frame in a compact, folded configuration for transport or storage.
5. Operating Considerations
As a frame kit, this product does not have "operating" instructions in the traditional sense. Its operation is dependent on the electronic components (flight controller, motors, ESCs, VTX, camera, etc.) you choose to install and configure. However, understanding the frame's design principles is crucial for optimal performance.
- Long Range Design: The X-CLASS frames are optimized for long-range FPV flights, offering stability and space for larger batteries and efficient propulsion systems.
- DJI O3 Air Unit Compatibility: The frame is designed to seamlessly integrate with the DJI O3 Air Unit System, ensuring proper mounting and protection for this critical component.
- Stronger Arms: The robust carbon tube arms (20x20mm) provide enhanced durability and resistance to flex, which is vital for stable flight, especially with larger propellers and heavier payloads.
- Quick Dismantling: The frame's quick dismantling feature allows for easy transport and storage, making it convenient for pilots who travel with their drones.
6. Maintenance
Proper maintenance will extend the lifespan and ensure the safety of your FPV frame kit.
- Regular Inspection: Before and after each flight session, inspect the carbon fiber frame for any cracks, delamination, or signs of stress. Check all screws for tightness.
- Cleaning: Clean the frame regularly with a soft, dry cloth. Avoid using harsh chemicals that could damage the carbon fiber or other components.
- Screw Check: Carbon fiber frames can experience vibrations that may loosen screws over time. Periodically check and re-tighten all fasteners, especially those securing the arms and main plates. Consider using a small amount of non-permanent threadlocker on critical screws.
- Component Integrity: Ensure that all mounted components (flight controller, VTX, motors, camera) are securely fastened and that their wiring is neat and protected from abrasion.
- Storage: When not in use, store the frame kit in a cool, dry place, away from direct sunlight and extreme temperatures. Utilize the quick dismantling feature for compact storage if needed.
7. Troubleshooting
This section addresses common issues related to the frame kit itself. For issues related to electronic components, please refer to their respective manuals.
- Loose Arms/Components: If you notice any wobble or play in the arms or other frame components, check and tighten all associated screws. Ensure proper assembly as per Section 4.
- Vibration Issues: Excessive vibrations can often be traced back to loose components, unbalanced propellers (not included with frame kit), or improperly mounted flight stack. Verify all frame connections are secure and consider adding additional vibration dampening if necessary.
- Damaged Carbon Fiber: In case of a crash or impact, inspect the carbon fiber for cracks. Even small cracks can compromise structural integrity. Replace damaged parts immediately.
- Stripped Screw Holes: Avoid overtightening screws. If a screw hole becomes stripped, you may need to use a slightly larger screw (with caution) or consider replacing the affected carbon fiber part.
8. User Tips
- Component Compatibility: Always double-check the compatibility of your chosen motors, flight controller, VTX, and camera with the frame's mounting patterns and available space before purchasing.
- Build Quality: Take your time during assembly. A meticulous build ensures better flight performance and durability.
- Wiring Management: Plan your wiring layout carefully to keep it tidy and protected. This prevents interference and potential damage during crashes.
- Review Feedback: Users have reported satisfaction with the product as advertised, noting prompt handling and shipping. This suggests a reliable product and seller.
9. Frequently Asked Questions (FAQ)
No specific frequently asked questions were provided for this product. For general FPV building questions, please consult online communities and resources.
10. Safety and Compliance
⚠️️ Disclaimer: For recreation use only. Illegal modification of drones/planes is prohibited. Please also pay attention to the relevant laws and regulations on the use of drones/planes in your country/area to ensure legal use.
Always operate your FPV drone responsibly and in accordance with local aviation regulations. Ensure you have the necessary knowledge and skills before flying.
11. Warranty and Support
For any warranty claims, technical support, or inquiries regarding your iFlight X-CLASS FPV Frame Kit, please contact the seller or the official iFlight support channels. Keep your proof of purchase for warranty validation.