Accession Number : AD0786458

Title :   Stability Derivatives of a 10 degree Cone Executing Planar and Nonplanar Motion at Mach 14.

Descriptive Note : Technical interim rept. Jun 73-Jun 74,


Personal Author(s) : Yelmgren,Kevin E. ; Sawyer,Frank M. ; Walchner,Otto

Report Date : AUG 1974

Pagination or Media Count : 46

Abstract : A 10 degree half angle circular cone with 1.6% nose bluntness was mounted to the sting-strut support system of ARL's 20-inch Mach 14 wind tunnel by means of a two-degree of freedom flexure. The small amplitude (approximately 3 deg.) free oscillation technique allowed the investigation of planar motion in pitch, or planar motion in yaw, or nonplanar motion in pitch and yaw combined. In the case of planar motion, the logarithmic amplitude decayed linearly with time. In the case of nonplanar motion, however, the amplitude decay of both the pitch and yaw components was modulated. (Modified author abstract)

Descriptors :   *Conical bodies, *Hypersonic flow, Pitch(Motion), Coupling(Interaction), Aerodynamic stability, Slender bodies, Yaw, Reentry vehicles

Subject Categories : Guided Missile Dynam, Config & Cntrl Surfaces
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE