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 Technical Note National Advisory Committee for Aeronautics written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1951 with total page 932 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Spanwise Distribution of Lift for Minimum Induced Drag of Wings Having a Given Lift and a Given Bending Moment written by Robert T. Jones and published by . This book was released on 1950 with total page 708 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of the minimum induced drag of wings having a given lift and a given span is extended to include cases in which the bending moment to be supported by the wing is also given. Expressions for the spanwise load distribution and the minimum drag in terms of the lateral position of the load centroid are given. The results show a 15-percent reduction of the induced drag with a 15-percent increase in span over that for an elliptic loading having the same total lift and bending moment.

Download or read book Three dimensional Unsteady lift Problems in High speed Flight written by Harvard Lomax and published by . This book was released on 1950 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The problem of the build-u of lift on two- and three-dimensional wings flying at high speeds is discussed as a boundary-value problem for the classical wave equation. Kirchhoff's formula is applied so that the analysis is reduced, just as in the steady state, to an investigation of sources and doublets. Some simple applications of this method are considered, including the determination of the starting lift of a three-dimensional wing and the potential functions for some types of unsteady vortex motion.

Download or read book Report National Advisory Committee for Aeronautics written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1949 with total page 702 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 1951 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 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 The Shock and Vibration Bulletin written by and published by . This book was released on 1949 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Technical Reports written by and published by . This book was released on 1949 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 Technical Note written by and published by . This book was released on 1949 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Mechanical and Corrosion Tests of Spot welded Aluminum Alloys written by Fred M. Reinhart and published by . This book was released on 1951 with total page 766 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrosion behaviro of spot-welded aluminum-alloy (alclad 24S-T3, 24S-T3, alclade XB75S-T6, XB75S-T6, and R-301-T6) panels of varying weld quality was determined. Tidewater and weather exposure tests were made and the results were evaluated largely in terms of distribution of corrosion products and effects on weld strength. Metallographic examinations of several of the alloys were also made to determine the extent and type of corrosion attack associated with various welding and exposure conditions.

Download or read book List of Technical Notes 1947 1953 written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1954 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Selected Listing of NASA Scientific and Technical Reports for written by and published by . This book was released on 1949 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Index of NACA Technical Publications written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1949 with total page 1370 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Memorandums written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1956 with total page 488 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chiefly translations from foreign aeronautical journals.