The DC-10 was a $10 million trial and appeared to be a political reaction to save face to the Russian alternative suggested by the Libs. Could never see how that would ever be as effective as Elvis & friends. The turn around time was not pretty and the Skycrane could dump more liquid on target than the DC-10.
Where was the 10 going to be based? Moorabbin, no, only B767s land there. Essendon, no, too noisey for the home owners. Tulla, mmmm, that would be good having an empty firefighter getting priority over regular users. Now where else is there???????