Conclusion

The practical development work needed to produce a satisfactory high-performance hydraulic system will by no means be eliminated when the system has been designed by using the methods of linear analysis described in this book. The same would be true even if more complicated methods of calculation were adopted. It is doubtful whether any such system has ever been developed from slide rule and drawing board alone. It is equally doubtful whether a system could be produced by trial and error methods alone. A satisfactory system will probably always need both practical and analytical treatment.