Hs 129 barely flyable

[RPS69]

Originally Posted by Rabb

Well, it is actually the other way around.

Prop pitch (together with throttle) is reduced in dives to prevent engine over-revving and subsequent damage, an to slow a dive a bit. Increasing prop pitch should reduce drag (propeller blades are more aligned with airflow), and thus enable (just for a bit) better speed gain. But it has to be controlled within engine RPM limit.

Of course, exact relations depend on aircarft's speed and throttle setting.

You both actually stated the same thing.