Abstract: A high energy propellant, comprising an oxetane thermoplastic elastomer energetic binder admixed with a high energy explosive filler. The oxetane thermoplastic elastomer energetic binder preferably comprises from about five percent to about thirty percent by weight and the high energy explosive filler comprises from about seventy percent to about ninety-five percent by weight of the composition. A preferred propellant further includes an explosive plasticizer, preferably in an amount of about four percent to about seven percent of the plasticizer by weight of the propellant. The preferred filler is selected from the group consisting of CL-20, TNAZ, RDX and mixtures thereof. The preferred plasticizer is selected from the group consisting of TNAZ, BTTN, TMETN, TEGDN, BDNPA/F, methyl NENA, ethyl NENA and mixtures thereof.

Abstract: A high pressure, short rise time pulse is generated by first pressurizing a arge chamber utilizing a pressure fluid. An initially closed channel communicates the large chamber with a small test chamber that is closed except for the channel and to which one or more pressure gauges are connected. One of the pressure gauges may be utilized as a standard to indicate pressure in the chamber while another one of the gauges can be calibrated utilizing the device. The channel is abruptly opened to discharge the high pressure fluid from the large chamber to the small test chamber. Only a small amount of fluid enters the small test chamber but the pressures in the large and small chamber are equalized rapidly so that the small chamber experiences a high pressure, short rise time pulse.