Accession Number : AD0729232

Title :   Ein Beitrag zur Theorie der Stufenraketan (A Contribution to the Theory of Multistage Rockets),

Corporate Author : DEUTSCHE FORSCHUNGSANSTALT FUER LUFT- UND RAUMFAHRT E V BRUNSWICK (WEST GERMANY) INSTITUT FUER FLUGMECHANIK

Personal Author(s) : Schulz,Werner

Report Date : 20 SEP 1961

Pagination or Media Count : 10

Abstract : A survey of papers dealing with the optimisation of multi-stage rockets is presented first. These papers contain investigations, in terms of suitable non-dimensional parameters, about the dependence of the performance of rockets on the mass ratios of various components of the structure, the payload, the thrust, and the specific impulse. Then a condition is derived for the most favourable instant at which, for a given trajectory, the transition from one stage of a multi-stage rocket to the next one occurs. If each stage of a multi-stage rocket is ignited at the very moment the preceding stage is burnt out, and if the mass of the burnt-out stage is shed simultaneously from the rest of the rocket, the propellant would have to be distributed over the various stages in such a way that the ratio of the rocket acceleration over the mass flow at cut-off prior to shedding equals the same ratio at ignition of the next stage after shedding, in order to obtain the maximum cut-off velocity of the last stage. In order to achieve a ceiling of the trajectory as high as possible or a range as large as possible, the most favourable time is generally lagging slightly behind that for the maximum cut-off velocity. (Author)

Descriptors :   (*ROCKETS, *STAGING), THRUST, PAYLOAD, ACCELERATION, STAGING, MATHEMATICAL ANALYSIS, WEST GERMANY

Subject Categories : Guided Missile Traj, Accuracy and Ballistics

Distribution Statement : APPROVED FOR PUBLIC RELEASE