Why does airspeed change when I adjust the prop?

Thomas Borchert wrote:
As usual, the questions are worthwhile. It's the answers to the answers. But
my reasoning was that a lot of pilots transitioning to complex airplanes have
these questions.

I think everyone appreciates the calm, thoughtful and useful responses.

Some people would simply ask, get one answer, and go away. The extra
questioning that Mx gives to some answers can be frustrating, but also
interesting, because it's the in-depth replies that really bring out
the piloting experiences we all like to hear about.

Just saying something is true isn't enough sometimes. As you yourself
recently wrote: "Argument by authority isn't really a good way to try
to convince intelligent people".

Regards and thanks,
Kev