A gas gun generates a high-speed projectile, and is used for a high-speed impact experiment. Since the tear gas gun not using powder has easy operation, it is used for many impact experiments. At this laboratory, the gas gun is developed, various projectile are accelerated and the impact experiment is conducted. There is a requirement which fires a big projectile and the launching tube of a 20mm caliber was changed into a 50mm caliber. The result is reported. Moreover, the impact test to Space Equipment was conducted as an example of use of a gas gun, and the measurement impact acceleration and Shock Response Spectrum was reported.
