摘要:
The main subjects of the present invention are: a process for obtaining a solid composite propellant (with a polyurethane binder filled with ammonium perchlorate and with aluminum): characteristically, the ammonium perchlorate charge of said propellant is obtained from at least two charges each having a specific monomodal particle size distribution. It is thus sought to reduce the thrust oscillations and the alumina deposits at the back of the engine; a solid composite propellant, the solid propellant charges and the associated rocket engines.
摘要:
A device for monitoring a viscoelastic material by subjecting the sample to vibration and analyzing the response of the sample to such vibration. According to the invention, the sample (13) is placed in a chamber (20) situated between a vibration source (22) and a vibration sensor (25), these elements being pressed towards each other by means (35, 39) for applying initial mechanical loading.
摘要:
A device for monitoring a viscoelastic material by subjecting the sample to vibration and analyzing the response of the sample to such vibration. According to the invention, the sample (13) is placed in a chamber (20) situated between a vibration source (22) and a vibration sensor (25), these elements being pressed towards each other by means (35, 39) for applying initial mechanical loading.