FP400 seed spreading drone

  Aircraft Inspection Before operation, users must inspect the aircraft to ensure safe work: 1. Check the arm buckle and the aircraft frame  2. Expand the aircraft propellers by 180° without damage or deformations. 3. Install the battery securely and fully charge it. 4. The LED lights should function properly with a solid yellow light. 5. Fully charge the remote controller. 6. The motors operate smoothly without any abnormal sounds. 7. Connect the app to the aircraft without error reports.   Material Calibration 1. Roller Selection Select the appropriate roller according to the materials used in this operation. The FP400 seed spreading drone is equipped with two types of roller. When the dosage per mu is less than 5kg, use small roller. When the dosage per mu is more...