Thanks for the reply.

The more I think about it you probably wouldn't want to reuse the shield anyway. Although the Titanium could be recycled.

The added weight of the water/oil is prohibitive.

Actually the saucer shape is acting as a heat shield but not an ablative one, it wasn't the crew compartment which was separate and surrounded by a Vacuum layer and other insulating materials like ceramic tiles.

I realize that flat shapes would be unstable. I suggested a cone or inverted frisbee saucer shape.

Actually this has given me a new idea that the air from above the saucer could be pumped down through the center to create an air shield.

Man you would think all that energy could be redirected like using it to turn a turbine and redirecting the exhaust as reverse thrust.
Like those devices on fighter jet aircraft that clamp around the back of the jet engine and cause the thrust to be redirected forward.