Originally Posted by
Stuka Child
To give your elevators a chance against that massive stabilizer. If you keep the thrust in there, you will continue to speed up and at some point the thrust pitch couple is going to become irrelevant as the aircraft starts going downhill. At high speed going towards the ground with full nose down trim, you might as well not have elevators. Only thing you can do is trim for your life. And depending on how close the ground is, results not guaranteed.
Much better to reduce thrust ahead of time. It's going to want to go downhill, but you should have enough elevator authority to keep it from doing so despite being mad out of trim. At the same time you use electric trim to lighten the pull and if you reach the conclusion that something is wrong with the automatic trimming (which conclusion you probably SHOULD have reached by now), then you cut it off with the switches. You are now in a more or less stabilized state.
Stuka Child, you address two scenarios: the first one where you do not have enough elevator authority to do anything with, and the second, where you do.
Let me ignore the first for a while, and respond to just the second. To reiterate, you stipulate that “you should have enough elevator authority to keep it [the thrust pitch couple] from doing so [want to go downhill].” To that you say, “much better to reduce thrust ahead of time.” Again I ask,
why? I already identified all the advantages of not reducing it. (That you will climb and gain valuable altitude, the value of which hopefully doesn’t need spelling out; and that there will be less resistance to the pitch up than if thrust is reduced. In a scenario where elevator authority is marginal, this is significant.)
What is the advantage of reducing it? You cannot say “to give your elevators a chance,” because that chance is a consequence of airspeed, and airspeed has nothing to do with thrust. You reduce airspeed by increasing the AOA, which establishes a climb if you leave the thrust alone. This airspeed reduction satisfies your “give your elevators a chance” with or without the thrust reduction just the same, so it cannot be the answer.