Fire fighting system and method for fires in jungles, refineries and oil pipelines

This invention describes an aerial firefighting system that uses two helicopters. The first helicopter drops tanks filled with sand around and on top of a fire to smother it. A second helicopter then sprays water from its own tanks onto the fire to ensure it doesn't reignite. The claims specify the first extinguishing element is sand.

Why it matters: Heavy-lift drone technology has advanced significantly since 2010, potentially offering more precise or autonomous delivery of extinguishing agents than manned helicopters. This could make the two-stage delivery method more feasible or efficient.

Status: ExpiredProtection ended and was never renewed
How hard to build: SpecializedAircraft integration, large tanks, compressed air

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