Negative Coefficient of thrust

[Ajaykrishna0703]

Dear Community members
I am doing a J-sweep with the propellers files i have generated on my own I am simulating at 12m.s Vinf at 1500rpm my prop radius is 0.203m hence my advance ratio is 1.18. I am getting a negative Coefficient of thrust after simulation i tried changing the rotation of propeller to clockwise also it is giving the same negative Coefficient of thrust, where i am going wrong

[sakurakikiki]

Brother, I am the same, when the advance ratio is greater than 1, the thrust torque is unstable and there is a negative situation, I do not know what the problem is, may I ask you to solve it?