The water-cooled 350 engine performs excellently. Specifically, the engine can provide the drone with strong and stable power output. Whether it needs to take off quickly, climb to high altitudes, or maintain high-speed cruising, the water-cooled 350 engine can handle it with ease. Taking some application scenarios as an example, the take-off weight of equipped with this engine can reach a relatively high level. This allows the engine to carry more pesticides, materials and other payloads, greatly improving operating efficiency.