Hi @asimon,
Thanks for posting your question and welcome to simscale 
I think you are on the right track by looking at the propeller project from @gholami.
If you ignore the pitch control, and use a rotating mesh (with AMI) this should work. Although keep in mind that AMI is more computationally expensive than MRF.
To move ahead with this, can you share your project link publically so that we can take a look at your current settings?
Very interesting project btw!
Cheers,
Anna