I have posted on the "requests for simulation" section, but I will repeat here the description of a certain phenomenon that I have read about on a table tennis forum. The source of the information would be a chinese national coach, so I give it some credit
The information is that a ball with topspin loses some rotation when it bounces on the table (which I can understand), but gets increasingly more spin during the flight just after the bounce (which I can not understand), until a certain maximum is reached, after what it loses spin as expected.
Is it true? Could you explain the physics here?