So, knowing the thrust and torque of the propeller, I know the resistance also. So, I know the thrust reduction fraction, and using this n t and Q, I can calculate K T and K Q. Do you understand? K T is T by rho n square d 4 and K Q is t by rho n square d 5, and from there, I can go to J from the propeller open water diagram and get the V A. There is only one assumption here that, the thrust and torque that I have measured would be the same thrust and torque at same speed and same rpm in propeller open water, because I have use the same diagram. Are you understanding me?