Electric vertical takeoff and landing composite wing unmanned aerial vehicle, commonly known as eVTOL Fixed Wing Hybrid or VTOL Composite Wing unmanned aerial vehicle, is an advanced flight platform that combines the advantages of both multi rotor unmanned aerial vehicles and fixed wing unmanned aerial vehicles.

　　Electric: means it is powered by batteries, clean, quiet, and easy to maintain.

　　Vertical takeoff and landing: This means it can take off and land vertically like a multi rotor drone without relying on a runway, with extremely low requirements for takeoff and landing sites.

　　Composite wing: This is the key. It is not simply a combination of rotors and fixed wings, but rather a sophisticated design that uses vertical lift systems (such as rotors) during takeoff and landing, and relies mainly on the aerodynamic lift of fixed wings for efficient cruising during level flight.

　　Application scenarios

　　1. Surveying and mapping:

　　Conduct large-scale terrain mapping, earthwork surveying, and 3D urban modeling. Long endurance and high speed enable it to quickly complete large-scale operations.

　　2. Power and pipeline inspection:

　　Automated inspection of long-distance transmission lines and oil/gas pipelines. Vertical takeoff and landing facilitate hovering inspection at specific towers or nodes.

　　3. Logistics transportation:

　　It is one of the ideal platforms for air logistics, used for the distribution of emergency medical supplies over medium to long distances and the transportation of goods between mountainous areas or islands.

　　4. Security and surveillance:

　　Used for wide area monitoring of border patrols, large industrial parks, and emergency command sites, providing a long-term aerial perspective.

　　5. Agriculture and Environmental Protection:

　　Conduct large-scale agricultural and forestry surveys, monitor pests and diseases, track wildlife, and monitor the environment.

　　6. Military and Defense:

　　Used for tasks such as tactical reconnaissance, intelligence gathering, communication relay, and area denial.

　　VF25E Electric Vertical Takeoff and Landing (eVTOL) Fixed-Wing UAV: Your Guide to After-Sales Support and Maintenance

　　The VF25E eVTOL Fixed-Wing UAV is engineered for professional-grade performance, blending the versatility of vertical takeoff and landing with the efficiency of fixed-wing flight. To ensure your investment delivers maximum operational uptime and longevity, a comprehensive understanding of after-sales support, routine maintenance, and proper storage is essential. This guide provides detailed instructions and information to help you maintain your VF25E in peak condition throughout its service life.

　　Comprehensive After-Sales Support Policy

　　Our commitment to your success begins after your purchase. We offer a robust after-sales support ecosystem designed to provide swift, effective, and professional assistance, ensuring your VF25E operates seamlessly in the field.

　　1. Professional Technical Support Channels

　　Our global technical support team is your direct line to expert assistance. We provide multiple channels to cater to your needs:

　　Email Support: For non-urgent, detailed technical inquiries, documentation requests, and step-by-step troubleshooting guidance. This is the preferred channel for complex issues that may require schematic reviews or detailed logs.

　　Dedicated Support Portal: Registered clients gain access to our online portal, featuring a knowledge base, downloadable manuals, software updates, and a ticket submission system for tracking the status of your requests.

　　Scheduled Video Calls: For intricate operational challenges, we can arrange one-on-one video sessions with our senior engineers for real-time, visual diagnostics and support.

　　2. Warranty Coverage and Service Process

　　The VF25E is backed by a clear and comprehensive 12-month standard warranty from the date of delivery.

　　What is Covered: The warranty includes repair or replacement of components found to be defective in materials or workmanship under normal use and in accordance with the official operator's manual. This covers the main airframe, factory-installed propulsion motors, electronic speed controllers (ESCs), flight controller, and servos.

　　Warranty Service Procedure:

　　Contact Support: Initiate a service request via our support portal or email, providing your UAV's serial number and a detailed description of the issue, including any relevant flight logs or photos.

　　Preliminary Diagnosis: Our support team will work with you to perform initial remote diagnostics.

　　RMA Authorization: If a return is necessary, we will issue a Return Material Authorization (RMA) number. Any product returned without a valid RMA number will not be accepted.

　　Product Return: Ship the product to our designated service center, securely packaged and with the RMA number clearly marked on the outside. Please include all accessories related to the fault.

　　Assessment and Resolution: Upon receipt, our technicians will conduct a thorough assessment. We will inform you of the findings and the expected resolution timeline. Repairs or replacements will be carried out promptly.

　　3. Out-of-Warranty and Lifelong Services

　　Beyond the standard warranty period, we offer lifelong paid repair and maintenance services. This ensures the long-term sustainability of your VF25E fleet. We provide transparent pricing for out-of-warranty repairs, component replacements, and system upgrades. Our goal is to be your lifelong partner, offering cost-effective solutions to extend the operational life of your equipment.

　　Routine Maintenance and Inspection Schedules

　　Proactive and regular maintenance is the cornerstone of UAV reliability and safety. Adhering to this schedule will significantly reduce the risk of in-flight failures and extend the service life of your VF25E.

　　Pre-Flight Inspection (Before Every Mission)

　　This is a mandatory check to be performed before each flight.

　　Airframe Structure: Visually inspect the entire airframe, including wings, fuselage, and tail, for any cracks, fractures, or deep scratches, paying special attention to the joint areas of the VTOL arms.

　　Propulsion System: Check all propellers for nicks, cracks, or imbalance. Ensure they are securely fastened. Manually rotate each motor to feel for any grit or bearing roughness. Listen for unusual sounds.

　　Power System: Check the battery for any physical damage, swelling, or leakage. Verify the battery voltage and charge level. Ensure all connectors are clean and secure.

　　Sensors and Avionics: Inspect the housing of the GPS/IMU module and other external sensors for damage or obstructions. Confirm that the GPS achieves a strong satellite lock in a clear area.

　　Payload and Gimbal: Ensure the payload is securely mounted and connections are proper. Check the gimbal for free movement and calibrate if necessary.

　　Post-Flight Maintenance

　　Cleaning: Gently wipe down the airframe to remove dust, moisture, grass, and insects. Use a soft, dry cloth. For stubborn residues, use a cloth slightly dampened with isopropyl alcohol.

　　Battery Handling: After flight, allow the battery to cool to ambient temperature before charging. Never leave a depleted battery unattended for long periods; recharge it to a storage voltage (typically 3.8V per cell) if it will not be used soon.

　　Weekly or 50-Flight-Hour Maintenance

　　Detailed Structural Check: Perform a more meticulous inspection of the airframe, applying gentle pressure to high-stress areas to detect hidden damage.

　　Connector Integrity: Check the tightness and condition of all electrical connectors throughout the UAV and ground control station.

　　Software and Firmware: Check for and install any available updates for the flight controller, ground control station software, and payload firmware.

　　Annual or 500-Flight-Hour Maintenance

　　We highly recommend sending your VF25E back to an authorized service center for an annual comprehensive inspection, regardless of its apparent condition. This inspection includes:

　　Deep cleaning of internal components.

　　Vibration analysis and motor balancing.

　　Detailed calibration of all sensors (IMU, Compass).

　　Stress testing of the propulsion system.

　　Full functional test of the avionics and communication systems.

　　Optimal Storage Conditions and Long-Term Preservation

　　Proper storage is critical for preserving the health of your VF25E, especially its lithium polymer batteries and electronic components.

　　Environment Requirements

　　Temperature: Store the UAV and its components in a cool, dry environment. The ideal ambient temperature is between 5°C and 25°C (41°F to 77°F). Avoid extreme temperatures. Do not store in direct sunlight or in a vehicle.

　　Humidity: Relative humidity should be maintained below 60% to prevent condensation and corrosion on electronic circuits and metal parts.

　　Conditions to Avoid: Storage areas must be free from dust, corrosive chemicals, and strong magnetic fields. The area should be well-ventilated.

　　Battery Storage Protocol

　　Lithium Polymer batteries require specific care during storage to ensure safety and longevity.

　　Charge Level for Storage: Batteries must be discharged or charged to a stable storage voltage, which is approximately 3.8 volts per cell. Never store batteries at full charge (4.2V/cell) or completely depleted (below 3.0V/cell) for extended periods.

　　Inspection During Storage: Even in storage, batteries should be visually inspected every one to two months for any signs of swelling, leakage, or voltage drop.

　　Fire Safety: Store batteries in a fire-proof container or bag, away from flammable materials.

　　Long-Term Preservation Steps (For storage exceeding 3 months)

　　Thoroughly clean the entire UAV.

　　Discharge/charge all batteries to the storage voltage (3.8V/cell).

　　Remove the batteries from the UAV and store them separately in a fire-proof bag.

　　Place the UAV and its components in the original factory transport case.

　　Store the case in the recommended environmental conditions.

　　Troubleshooting and Accessory Support

　　Common Issues and Preliminary Solutions

　　Issue: Failure to Arm Motors.

　　Check: Ensure the GPS has a strong signal (more than 8 satellites). Verify that the flight mode is set correctly. Check for any pre-flight error messages on the Ground Control Station (GCS).

　　Issue: Unstable Hover or Flight.

　　Check: Perform an advanced IMU and compass calibration in a magnetically clean environment. Check for damaged propellers or motors.

　　Issue: Poor Video Transmission Link.

　　Check: Verify antenna connections on the UAV and ground station. Ensure antennas are oriented correctly and are free from physical damage.

　　Issue: Rapid Battery Voltage Sag.

　　Check: The battery may be aged or damaged. Check its internal resistance with a suitable meter. Ensure you are using the correct battery specification and that it is properly charged.

　　Accessory and Spare Parts Availability

　　We maintain a full inventory of genuine VF25E spare parts and accessories to support your operations. Available items include:

　　Propulsion System: Replacement propellers, brushless motors, ESCs.

　　Power System: Genuine intelligent batteries and chargers.

　　Landing Gear and Structural Parts: Replacement arms, wing sets, fuselage modules.

　　Payloads: Official compatible cameras and sensors.

　　Using genuine parts is crucial for maintaining performance, warranty coverage, and most importantly, flight safety.

　　Conclusion: A Partnership for Performance

　　The VF25E eVTOL UAV is a sophisticated platform built for reliability. By leveraging this comprehensive after-sales support framework and adhering to a disciplined maintenance and storage regimen, you can maximize your operational efficiency, ensure data acquisition success, and protect your aerial asset for years to come. Our global support team is always ready to assist you in achieving your mission objectives. For further assistance, please visit our support portal or contact our technical team directly.