This study proposes a conceptual engineering approach for a fan-assisted rain-type aerial firefighting system, addressing the well-documented limitations of gravity-driven water drops used in aerial wildfire suppression. Recent research has demonstrated that the effectiveness of conventional aerial firefighting operations is highly variable and strongly constrained by environmental conditions, fire behavior, drop footprint geometry, and evaporative losses, often resulting in limited interaction between released water and the active fireline.The proposed approach introduces a controlled downward airflow during water release to actively influence droplet momentum and spatial distribution. Instead of relying on free-fall, high-impact drops, the system aims to form a rain-like cooling and wetting layer over the target area. By reducing lateral drift and shortening droplet residence time within hot buoyant plumes, the approach seeks to improve surface cooling efficiency and water utilization.This work does not claim experimental validation or numerical fluid dynamics verification. Rather, it presents a physics-informed conceptual framework grounded in established principles of droplet dynamics and heat and mass transfer. The objective is to introduce an alternative suppression mechanism that treats air–water interaction as a design parameter and to provide a foundation for future experimental and computational investigations.Keywords:Aerial firefighting; Droplet dynamics; Controlled airflow; Evaporative losses; Surface cooling; Wildfire suppression
Mustafa Ümit Oğuz (Fri,) studied this question.