New Spaceship idea

A conventional rocket which seeks to leave earth's gravity needs to lift its fuel along with everything else. This leads to diminishing returns as additional fuel adds additional weight.It would be far better if the fuel could somehow be added in transit rather than lifted.

One way to do this would be to launch the fuel separately to be caught by the rocket in flight. Water could serve as fuel by way of its extreme expansion when heated into steam. Therefore shooting water at an inflight rocket would be beneficial. Not only would it provide fuel but the force of the water hitting the ship would push it upward.

Picture a spaceship with a wide hoop attached to to the top which would catch the water and channel it to the ship thru spokes. Water could be shot at the hoop from the the ground.

At higher attitudes the water might freeze and a a pulse throwing ice balls rather than a steady stream might be desirable. It is also possible that the speed required of the water would cause it to burn up through friction. This could perhaps be remedied by a heat resistant coating placed on water balloons or ice