Accession Number : AD0700426

Title :   NON-LINEAR DYNAMIC INSTABILITY OF BLACK BRANT SINGLE STAGE ROCKETS,

Corporate Author : DEFENCE RESEARCH TELECOMMUNICATIONS ESTABLISHMENT OTTAWA (ONTARIO)

Personal Author(s) : Huva,J.

Report Date : 04 DEC 1968

Pagination or Media Count : 9

Abstract : The report concerns the results of an investigation into the cause of failure of DRTE rocket BB II-50. During flight, the rocket developed a diverging angle of attack which caused the nose tip and fins to break off. This, together with a reduction of the trajectory angle, prevented the vehicle from reaching a useful altitude. With the help of wind tunnel tests, it is shown that the divergent angle of attack is caused by effects of vehicle asymmetries and non-linear aerodynamic moments. Roll magnitude, roll direction, and other aerodynamic moments are included in the following analysis of stability. The analysis provides a probable explanation for other flight failures of fin stabilized vehicles. The conclusions provide general guide lines for the design of future rocket payloads to ensure stable flight. (Author)

Descriptors :   (*SOUNDING ROCKETS, STABILITY), ANGLE OF ATTACK, ROLL, DRAG, FINS, AERODYNAMIC CHARACTERISTICS, AERODYNAMIC LOADING, FAILURE(MECHANICS), CANADA

Subject Categories : Rockets
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE