In recent years, large-scale forest fires have been breaking out all over the world. The damage from these is increasing every year, with videos showing American wineries and Australian koalas in crisis being featured on the news. Forest fires are generally extinguished using water sprinkled from an aircraft; however, at high altitudes, the water disperses, making it difficult for it to reach the point of the fire. Likewise, fire extinguishing activities at low altitudes are also dangerous as the smoke collects, thus impairing visibility. Therefore, we developed the ‘Drop Control System’, in order to drop all of the water needed to extinguish the fire from a safe altitude to the target point. The Drop Control System is a fire extinguishing system that instantly gels the water needed for fire extinguishing and controls the drop of the water. The gel-type fire extinguisher protects what you want to protect and minimizes the damage caused by the spread of the fire.