METHOD TO DETERMINE SOLID PROPELLANT BURNING RATE Russian patent published in 2006 - IPC F02K9/96 

FIELD: rocketry.

SUBSTANCE: proposed method includes fitting of two fusible wire warning units forming two independent electric circuits in solid propellant restricted rod specimen at a distance over length of specimen. Then specimen is burnt. In process of burning continuous recording of relative resistances for each circuit is carried out found from ratio of current resistance in circuit to resistance in circuit before beginning of burning. All time moments corresponding to moments of reaching of some preset empiric value equal to 1.05-1.15 of relative resistance are determined for each circuit separately. Then fixing fusing time for each warning unit is set equal to maximum time chosen from fixed moments. Then turning rate of solid propellant is found from ratio between distance at which fusible wire warning units are installed in specimen and difference in time of fusing of first and second warning units.

EFFECT: possibility of fixing fusing time of warning unit at slow change of resistance, prevention of error in determining moments of fusing at electric interferences.

4 dwg