Download or read book Effect of Aspect Ratio on the Air Forces and Moments of Harmonically Oscillating Thin Rectangular Wings in Supersonic Potential Flow written by Charles E. Watkins and published by . This book was released on 1950 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The linearized velocity potential for a thin, flat, rectangular wing undergoing sinusoidal torsional oscillations simultaneously with sinusoidal vertical translations in a supersonic stream is derived in the form of an infinite series in terms of a freqency parameter. Simple closed expressions that include the reduced frequency to the third power are given for the velocity potential, components of total force and moment coefficients, and components of section force and moment coefficients. It is found that the components of force and moment coefficients for small-aspect-ratio wings may deviate considerably from those for an infinite-aspect-ratio wing. The method of solution can be utilized for other plan forms, that is plan forms for which steady-state solutions are known.
Download or read book Effects of Aspect Ratio on the Air Forces and Moments of Harmonically Oscillating Thin Rectangular Wings in Supersonic Potential Flow written by Charles E. Watkins and published by . This book was released on 1951 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Time dependent Air Forces on Wings with Supersonic Leading and Trailing Edges and Subsonic Side Edges with Application to a Wing Deforming Harmonically According to a General Polynomial Equation written by Joseph A. Drischler and published by . This book was released on 1962 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Note written by and published by . This book was released on 1962 with total page 902 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Note written by and published by . This book was released on 1950 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Noise Survey of a 10 foot Four blade Turbine driven Propeller Under Static Condtions written by Max C. Kurbjun and published by . This book was released on 1955 with total page 686 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theoretical calculations of the sound-pressure levels by the method of NACA TN 2968 predict accurately, for the 10-foot propeller investigated, the location of and the maximum levels to be expected for the overall noise and the first two propeller harmonics. The calculations do not predict accurately the location of the maximum sound-pressure levels ad the maximum calculated levels are 10 and 13 decibels lower than the msximm messured levels for the third and fourth harmonics, respectively.
Download or read book Technical Note National Advisory Committee for Aeronautics written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1956 with total page 1056 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Compilation of Research Reports of Physical Research Division Dynamic Loads Division Loads Division 1921 1973 written by Gloria R. Champine and published by . This book was released on 1977 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Correlation Evaluation and Extension of Linearized Theories for Tire Motion and Wheel Shimmy written by Robert F. Smiley and published by . This book was released on 1956 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of systematic approximations to the summary theory is developed for the treatment of problems too simple to merit the use of the complete summary theory, and procedures are discussed for applying the summary theory and its systematic approximations to the shimmy of more complex landing-gear structures than have previously been considered.
Download or read book Discussion of Three dimensional Oscillating Air Forces Based on Wind tunnel Measurements written by Sherman A. Clevenson and published by . This book was released on 1953 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Abstracts written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1951 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Aspect Ratio on Undamped Torsional Oscillations of a Thin Rectangular Wing in Supersonic Flow written by Charles E. Watkins and published by . This book was released on 1949 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The velocity potential and aerodynamic-torsional moment coefficients based on the linearized equations of motion for small disturbances are derived for a rectangular wing by means of appropriate distributions of moving sources and doublets. The aerodynamic-torsional-moment coefficent to study the effect of aspect ratio on the undamped torsional oscillations of a finite rectangular wing. Decreasing the aspect ratio of the wing is found to have a highly stabilizing effect on the undamped torsional oscillations. The results of some selected calculations are presented in the figures that illustrate this fact.
Download or read book Kinetics of Sintering Chromium Carbide written by W. G. Lidman and published by . This book was released on 1951 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt: The sintering of chromium carbide under pressure was investigated in order to study the kinetics of grain growth and densification during this process. Densification was accompanied by grain growth, and density and grain size seem to be interdependent during this stage. Grain growth continued after densification was complete, and for this stage an activation energy for grain growth was obtained.
Download or read book Velocity Distribution on Wing Sections of Arbitrary Shape in Compressible Potential Flow written by Lipman Bers and published by . This book was released on 1950 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: The method of computing velocity and pressure distributions along wing profiles under the assumption of the simplified density-speed relation, outlined in NACA Technical Note 1006, is extended to the case of a nonsymmetrical profile and a flow with circulation. The shape of the profile, the speed of the undisturbed flow, and a parameter determing the angle of attack may be prescribed. The problem is reduced to a nonlinear integral equation which can be solved numerical by an iteration method. A numerical example is given.
Download or read book Annual Report of the National Advisory Committee for Aeronautics written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1954 with total page 1200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Includes the Committee's Technical reports no. 1-1058, reprinted in v. 1-37.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1968 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Report written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1952 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
