Traditional firefighting trucks are bulky and lack of maneuverability. Their firefighting operations in narrow urban alleyways are usually less effective. Traditional rotary-wing firefighting drones face critical limitations: low liquid discharging capacity (flow rate below 3L/s), inability to approach targets closely due to exposed high-speed rotating blades, and high risks of blade detachment that can lead to serious system failure. These issues often can cause secondary accidents at fire scenes, posing significant safety threats.