Complex sentence: To predict lift with any of these theories requires solving the equations for a particular airfoil shape and flow condition, which generally requires calculations that are so voluminous that they are practical only on a computer,, through the methods of Computational Fluid Dynamics (CFD).
Split into simpler sentences: To predict lift requires solving the equations for a particular airfoil shape and flow condition. However, solving these equations generally requires calculations that are so voluminous that they are practical only on a computer, through the methods of Computational Fluid Dynamics (CFD).