SpiceWeasel
Tre Kronor
Disclaimer: I've never flown a Dash-8, but I can describe exactly how a tail stall feels in a Convair 580 because it happened to me once.
The Convair had a nasty habit of accreting tail ice even on blue sky clear days if the temperature/humidity was right. It had to do with the horizontal stab being right in line with the beavertails (exhausts).
Anyway, you would never notice it until you dropped the flaps. At that point the lift from the wings exceeded the ability of the horizontal stab to compensate.
The nose dropped like a rock. The only recovery was to go to full power and yank the flaps back up so the elevator would regain effectiveness. The problem was, it took almost 1000 feet of altitude to recover. When I instructed in the CV-580, I used to recommend to the guys that they get the aircraft configured above 1500' agl just in case, especially if there was any suspicion that the tail could be iced up.
My experience happened one day on arrival at NAS Norfolk. Fortunately, we were high enough when the nose pitched over to recover. But, it was a scary ride, I can assure you.
Thanks man. Good info to know.