RU96106085A - COMBINED ARTILLERY THROWING - Google Patents

Claims (1)

Combined artillery propellant charge containing initiation means, an igniter and a charge consisting of two types of powder elements, the first type elements having a neutral burning surface and made in the form of plates with reserved end surfaces, and the second type powder elements made in the form of microcharges having areas of neutral and progressive combustion, all external surfaces of microproducts are reserved, with the exception of the entrance strip of the area of neutral combustion, exl characterized in that the areas of progressive combustion of microcharges have lateral surfaces profiled so that their initial section in the vicinity of X _gr = O is described by a power function
Y _gr = X $\genfrac{}{}{0ex}{}{\text{n}}{\text{gr}}$ ,
where n <1,
a further change in the profile of the side surfaces is described by the function

in which the coefficients a _{i are} determined from the conditions that the function Y _gr , its first and second derivatives should be equal to the corresponding values of equality (*) at the conjugation point of these functions, and from the conditions of equality of the calculated value of the combustion surface, its first and second derivatives at the end of combustion charge appropriate parameters obtained during design. The profile of the outer armored surface of the microcharge is determined from the system of equalities

where X _gr , Y _gr - the coordinates of the profile of the lateral surface of the microcharge;
X _p , Y _p - coordinates of the profile of the outer surface of the microcharge;
l is the value of the burnt vault.