The axial velocity will change as has been suggested earlier, that is, slow change will be there. There will be a change in pressure and then velocity will change for the downstream. So, we have a V 1 incremental velocity at the propeller disc and V 2 incremental velocity far away from propeller disc. In addition to that, there has to be a change in rotational velocity. Now, far forward of the propeller, there is no rotation of fluid. There would be a rotational velocity imparted on the fluid because of the rotation of the disc. That rotation if it was omega, then we can say at the disc, there can be additional fluid velocity, rotational velocity on the fluid as omega 1, and far field, there