1. Introduction
The JP ER-200 15mm Alloy Electric Retract is a high-grade landing gear system designed for remote control aircraft weighing up to 30kg. This retract unit is precision-engineered from CNC aluminium alloy, ensuring durability and smooth operation. It is specifically designed for use with 15mm oleo struts (struts are not included).
The ER-200 features an advanced sun-gear box system and high-strength 12.9 grade M4 worm for its motor system. Its double bearing structure contributes to extremely smooth operation, extended service life, and reduced noise, enhancing the safety and reliability of your electric retract system.
Important: A JP controller is required to operate this retract. JP controllers are designed to manage both retracts and gear door servos.
2. Specifications
| Feature | Detail |
|---|---|
| Material | Aluminium Alloy |
| Max Aircraft Weight | Up to 30 kg |
| Strut Diameter Compatibility | 15mm |
| Retract Angle | 90° |
| Retract Weight | 234g |
| Working Voltage | 5 - 8.4V |
| Retract Speed | 7 seconds (at 6V), 5 seconds (at 8.4V) |
| Origin | Mainland China |
| Recommended Age | 14+ years |
| Use | Vehicles & Remote Control Toys |
Dimensions
Refer to the diagrams below for detailed measurements of the ER-200 retract unit and its mounting plate.


3. Components
The JP ER-200 15mm Electric Retract package typically includes:
- 1 x JP ER-200 Electric Retract Unit
Note: Wire struts and oleo struts are not included and must be purchased separately. A compatible JP controller is also required for operation and is sold separately.
4. Setup and Installation
Follow these steps to properly install your JP ER-200 electric retract unit:
- Prepare the Aircraft: Ensure the mounting area in your RC aircraft is clear and correctly sized according to the dimensions provided in the Specifications section (Figures 1 and 2).
- Install the Retract Unit: Securely mount the ER-200 retract unit into the designated bay using appropriate hardware (not included). Pay close attention to the mounting plate dimensions and hole spacing for a precise fit.
- Connect to JP Controller: Connect the retract unit's wiring to your JP controller. Refer to your JP controller's manual for specific wiring instructions. Ensure all connections are secure and correct.
- Install Oleo Strut: Insert your 15mm diameter oleo strut (not included) into the retract unit's opening. Ensure it is seated correctly and secured as per the strut manufacturer's instructions.
- Initial Test: Before final assembly, perform a functional test of the retract system with the JP controller and your RC transmitter to ensure smooth extension and retraction.


5. Operating Instructions
Once the JP ER-200 electric retract is installed and connected to a compatible JP controller, operation is straightforward:
- Power On: Power on your RC aircraft and ensure the JP controller is active and properly initialized.
- Transmitter Control: Use the designated channel on your remote control transmitter that is linked to the JP controller to actuate the retract mechanism.
- Observe Movement: The retract will extend or retract smoothly. Note the operating speed: approximately 7 seconds at 6V and 5 seconds at 8.4V.
- Gear Door Synchronization: If gear doors are installed and connected to the JP controller, they will operate in synchronization with the retracts.
6. Maintenance
To ensure the longevity and reliable performance of your JP ER-200 electric retract, regular maintenance is recommended:
- Keep Clean: Periodically clean the retract unit to remove any dirt, dust, or debris that may accumulate during operation. Use a soft brush or compressed air.
- Inspect Connections: Regularly check all electrical connections between the retract, controller, and power source to ensure they are secure and free from corrosion.
- Lubrication: While the double bearing structure is designed for smooth operation, a light application of dry lubricant (e.g., PTFE spray) to moving parts can further enhance performance and reduce wear. Avoid oil-based lubricants that can attract dirt.
- Check for Wear: Inspect the mechanical components for any signs of wear, damage, or loose parts. Address any issues promptly to prevent further damage.
- Strut Inspection: Ensure the oleo strut is securely attached and operating freely.
7. Troubleshooting
If you encounter issues with your ER-200 electric retract, consider the following:
- Retract Not Moving:
- Check power supply to the JP controller and retract.
- Verify all wiring connections are correct and secure.
- Ensure the JP controller is functioning correctly and receiving signals from the transmitter.
- Inspect for any physical obstructions preventing movement.
- Slow or Erratic Movement:
- Check the voltage supplied to the retract; ensure it is within the 5-8.4V range. Lower voltage can result in slower operation.
- Inspect for any binding or friction in the mechanical linkage.
- Ensure the retract unit is clean and free of debris.
- Noise During Operation:
- While designed for low noise, excessive noise might indicate a foreign object, wear in the gears, or a need for light lubrication.
8. User Tips
No specific user tips were available from reviews or Q&A for this product at this time. Always ensure proper installation and regular checks for optimal performance.
9. Frequently Asked Questions (FAQ)
- Q: What is the opening angle of the retract?
- A: The retract operates at a 90-degree angle.
10. Warranty and Support
For any customization needs, changes, or support inquiries regarding your JP ER-200 electric retract, please contact the customer service of the JP Airplane Model Store. They accept customized product requests and can provide assistance.