The people of the Vorfall Panzer Werkstat gesellschaft build the largest aircraft in the galaxy. The pride of their fleet is currently the Gyre Explorer, which is an aircraft weighing in at 140,000 metric tons,capable of carrying 70,000 metric tons of cargo, covered with armour equivalent to the citadel armour of a WWII battleship, and capable of a constant 4g acceleration with its reactionless drives. It is used for exploration and trade.
However, VPW Gt is contemplating an even bigger aircraft, a water tanker/bomber capable of scooping, transporting and dumping a million tons of water... yes, a whole gigaliter of water, capable of accelerating at 1.5g to 2g at full load with its atomic power plants and reactionless drives.
Like any VPW aircraft, it would be capable of operating in the vacuum of space for at least a month. Its maximum atmospheric speed would be limited by the capability of its hull to withstand heating at high speeds in an atmosphere rather than the power of its drives.
This aircraft is intended to be used to collect, transport and deliver water for drought relief and fighting large scale bushfires.
My question is this: Would a gigaliter of water delivered by an aircraft capable of supersonic flight be sufficient capacity to deal decisively with large scale droughts and bushfires by the standards of modern-day Earth, or is it overkill?
Water could be collected by lowering the VTOL aircraft into a suitable body of water and opening the valves, and delivered by opening the valves at any suitable altitude. The valves are capable of variable flow, but the full load could be collected or dumped within ten minutes or less, at a rate of up to 2.5 megaliters per second in a 1g environment.
Lower flow rates and broad dispersal are possible by partially opening valves and increasing altitude.
I was never proposing having this aircraft just quickly dump a gigalitre of water in one shot in order to deal with a drought or fire. A fire might be dealt with by dropping water from a high altitude at a rate just sufficient to extinguish the fire but not the trees. To deal with a drought, water might be shipped to reservoirs, not just dumped on farmland.