Pitch up
What you guys don't appreciate is the tremendous pitch up of these tankers when the retardant is dumped.
My Air Tractor hauls 500 gallons and when I push the emrgency dump handle, it'll do a loop if I don't anticipate the pitch up. Some guys in the 602 (600 gallons) and the 802 (800 gallons) have almost stalled airplanes dumping, so they learned to slow down and fly a little flap down to minimize the pitch up. Others have recommended rolling into a 90 degree bank when they dump in a real emergency.
The 802 has computer controlled dump doors so that as the head pressure decreases, the doors open further and further, keeping the flow rate constant........really neat. There is one version called the "Fireboss" on Wipaire floats that can scoop 800 gallons from a lake or river while it's on the step, in 18 seconds!
Small fires that I've dumped on really make you on edge...but yes, it is a rush.
Regards,