C J Campbell writes:

Think about it. What happens to thrust and airspeed if you reduce RPM to 0?

Yes, I was thinking about that. But supposedly reducing the RPM
slightly just causes the CS prop to change pitch, which means that it
should still be producing the same thrust (or at least what I've read
seems to assert this). This doesn't hold for very low RPMs because at
some point the limits of practical pitch adjustment are reached.

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