ABSTRACT
This chapter describes the process for creating a rocket design from mission requirements. It discusses the requirements defining process and how to "derive requirements" from given mission requirements. Rocket scientists continued through the development of their understanding of requirements by developing a launch vehicle based on a set of given mission requirements. They introduced the open-source software rocket-simulation tool called OpenRocket and worked through the example using the OpenRocket code and developed a concept for a sounding rocket using all commercially available hobby rocket parts to perform a mission need. The chapter discusses the fineness ratio of a rocket body and how it can potentially impact rocket performance and failure risk. Rocket scientists then extrapolated the fineness ratio with the critical pressure for Euler buckling and showed how the two are related. The chapter discusses the details of designing even larger rockets and introduces a new set of mission requirements, as a new means for calculating and simulating rocket performance.
