| || Optimum Staging with Varying Thrust Attitude Angle
Author : Srivastava, T.N.
Source : Defence Science Journal ; Vol:16(3) ; 1966 ; pp 153-164
Subject : 629.76 Rockets and Missiles
Keywords : Optimum staging programme;Mass fractions;Arbitrary number
Abstract : Optimum staging programme for step rockets of arbitrary number of stages having different specific impulses and mass fractions with stages is derived, the optimization criterion being minimum take-off weight for a desired burntout velocity at an assigned altitude. Variation of thrust attitude angle from stage to stage and effects of gravity factor are taken into account. Analysis is performed for a degenerate problem obtained by relaxing the altitude constraint and it has been shown that problems of Weisbord, Subotowicz, Hall & Zambelli and Malina & Summerfield are the particular cases of the degenerate problem.