Originally Posted by
ToiletDuck
A Cessna 172 trimmed all the way down to 65kts would require all your power to keep it level if you added the power in all the way. Once an aircraft is trimmed it's trimmed and you aint gonna stop it from running off unless you manage your power.
In this situation it's not about overpowering trim. If it's trimmed at 135 that's where it's going to fly. If you're going to floor it with the levers then you need to re-trim to get away from that setting and not just try to overpower it.
What you are describing is an elevator trim stall. The 172 has a conventional tail that is in the propwash (and contributes to the pitch-up moment you mentioned), but one of the characteristics of the T-tail design
is that it gets the horizontal stabs and elevators out of of it.