Stability Derivatives Of Cones At Supersonic Speeds PDF Download

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Stability Derivatives of Cones at Supersonic Speeds

Stability Derivatives of Cones at Supersonic Speeds
Author: Murray Tobak
Publisher:
Total Pages: 43
Release: 1956
Genre: Cones
ISBN:

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The aerodynamic stability derivatives due to pitching velocity and vertical acceleration are derived for circular cones traveling at supersonic speeds. Both first-order and a combination of first and second order potential solutions are obtained, and in calculations for the forces, no approximations are made to the tangency condition or the isentropic pressure relation. In addition, expressions for the forces, moments, and stability derivatives of arbitrary bodies of revolution are derived from Newtonian impact theory.


Stability Derivatives of Triangular Wings at Supersonic Speeds

Stability Derivatives of Triangular Wings at Supersonic Speeds
Author: Herbert S. Ribner
Publisher:
Total Pages: 44
Release: 1948
Genre: Aerodynamics, Supersonic
ISBN:

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The analysis of the stability derivatives of low-aspect-ratio triangular wings at subsonic and supersonic speeds, given in NACA TN No. l423, is extended to apply to triangular wings having large vertex angles and traveling at supersonic speeds. The lift, rolling moment due to siderlip, and damping in roll and pitch for this more general case have been treated elsewhere on the basis of the theory of small disturbances.


Dynamic Stability Results for Sharp and Blunted 10-deg Cones at Hypersonic Speeds

Dynamic Stability Results for Sharp and Blunted 10-deg Cones at Hypersonic Speeds
Author: L. K Ward (Jr)
Publisher:
Total Pages: 29
Release: 1968
Genre:
ISBN:

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Tests were conducted to obtain dynamic stability data for sharp and blunted 10-deg half-angle cones. With both a free-oscillation gas bearing pivot balance system and a forced-oscillation cross-flexure pivot balance system, data were obtained at a nominal Mach number of 10 at free-stream Reynolds numbers, based on model length, ranging from 1,800,000 to 3,190,000. The effects of boundary-layer transition, amplitude of oscillation, nose bluntness, and model center-of-gravity location on the dynamic and static stability derivatives are presented. Comparison of data from the free- and forced-oscillation test techniques and the effect of frequency of oscillation on the damping-in-pitch derivatives are also presented. The derivatives are compared with steady and unsteady flow field theories. (Author).