The main objective of this chapter is to present the details of the hydrodynamic geometric layout of the inner surface of the shells. For this purpose, everything established in the previous chapters will be used as a hydrodynamic foundation, and the previously established geometry, in its smallest details, e.g., the dimensionless dimensions, will be used as a starting point. We should, therefore, expect that the result, once it has been complemented with the structural calculations of the shell, will allow us to develop an algorithm to build a model or prototype, along with templates, that can be sent to a 3D printer (machine), in this case, initially the inner surface of the shell. The collaboration of engineer Mr. Thiago Soares Correa was fundamentally important in doing this, particularly with respect to mapping the reference shell, in checking and interpolating the values, in drawing the 3D, in making the drawings and coordinates availability of for manufacture, and for prototyping the model or prototype in a 3D printer.