Although the concept of' rocket propulsion is an old one. In practice it is a relatively new aeronautical science. From the early experiments of long ago, rocket scientists have needed to know the performance of a rocket propellant system before designing a missile to use it. Originally, thermodynamists theoretically calculated the performance of a few carbon-hydrogen-oxygen propellants by hand. However, the complexity of the calculation coupled with the lack of high temperature thermodynamic data limited their activity.