I used to waterbomb on Canso's in the 80's. Granted the Canso appears to be one big, tough old bird, but I tend to disagree with your statement.Wings are not strong enough to sustain such treatment years after years. Apparently, 1 season of water bombing=7years of age.
For one thing, air tankers don't put on many hours in a year. And the hours they do put on really are not very demanding.
When you drop the load you check forward on the wheel and there is no G-loading. A few bumps around the fire area from updrafts and such are no worse then "regular" turbulance..
So why is there such a stigma around aerial tankers?.





