The cylinder of explosive with hollow cavity in one side and detonator at opposite side is called as hollow charge . Chemical energy generated by initiation of explosive is focused on the center of hollow cavity. And this concentrated force generates a jet with high penetration power. This phenomenon is well known as Munroe effect, and the generated jet is called as Munroe jet. When the hollow cavity is lined thin layer of metals and various materials, the liner form jet with higher penetration power than hollow charge. This is called as shaped charge which utilizes Neumann effect. Because many studies about hollow charge and shaped charge  are focused on property of penetration which is one of the most important factors of these phenomena, explosive and various metals have been used in experiments. In this study, simulation experiments of Munroe jet were conducted by replacing detonator and explosive in hollow charge by impactor with a velocity up to 800 m/s against shaped gelatin .
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- Model Experiment of Munroe Jet Formation Using Gelatin Driven by a Moderate-Speed Impactor
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