Hello I recently talked about my theory for propeller rpm and thrust with airflow in this post

https://www.simscale.com/forum/t/the-moving-propeller-problem-solved-continued/94235/4

I was wondering how I would calculate the propeller rpm at a certain speed if there was no power applied to the propeller so I can find the actual thrust of the propeller at a certain speed by adding the rpm it would be at a certain speed with no power and the extra rpm the propeller adds?

Thank you,

Frank Lucci