Most of the National Guard Blackhawk helicopters that I have seen dropping water on fires have used a collapsible bucket hanging from a very short line, about 25-30′ long. The prop wash from the rotor blades blows the fire all over the place.
That’s why I was pleased to see an earmark in the 2010 Department of Defense Appropriations Bill that allocates $4,160,00 for fixed belly tanks for National Guard Blackhawk helicopters.
Funding would be used for engineering, evaluation and procurement of the Recoil UH-60 Blackhawk Helicopter R60 Wildland Fire-Fighting Tank System (900 gallon) for the Army National Guard (ARNG). This is in an aim to make R60 tanks become organic equipment of the ARNG be distributed nationwide to State Army National Guard to support and respond to wildland fires.