Pete
Your comments on OH & S limits on scooping seem to indicate that Canadairs will not work. Which gets back to my suggestion that we should be using large airport based aircraft in a similar manner to the rest of the world.
Experiments with one aircraft be it an F27, DC6 or whatever prove or disprove nothing. The rest of the world uses multiple large aircraft in a planned and concentrated attack to extinguish fires as soon as they start.
I stand by my original suggestion that serious consideration should be given to obtaining the Sale trackers for conversion while we have them available.
Wunwing