Download or read book The Experimental Determination of the Moments of Inertia of Airplanes by a Simplified Compound pendulum Method written by and published by . This book was released on 1948 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: A coompound-pendulum method which eliminates the necessity for locating the center of gravity of the airplane by direct measurement is described. The pendulum length is found by measuring the difference between two suspension lengths and solving the equations for the two suspensions simultaneously. Experimental data and a precision analysis are included.
Download or read book The Experimental Determination of the Moments of Inertia of Airplanes by a Simplified Compound pedulum Method written by William Gracey and published by . This book was released on 1948 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 1950 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Method for Measuring the Product of Inertia and the Inclination of the Principal Longitudinal Axis of Inertia of an Airplane written by Robert W. Boucher and published by . This book was released on 1954 with total page 718 pages. Available in PDF, EPUB and Kindle. Book excerpt: The angle of inclination of the principal axis was found to have probable error of plus or minus 0.17 degrees both from analysis of the error of inertia measurement of the full-scale airplane and from tests with a model having a simple configuration. Analysis showed the probable error of the inertia measurements for the test airplane to be plus or minus1.00, plus or minus 0.49, and plus or minus 0.35 percent of the true moment of inertia about the X, Y, and Z body reference axes, respectively.
Download or read book Experimental Determination of Airplane Mass and Inertial Characteristics written by Chester H. Wolowicz and published by . This book was released on 1974 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report reviews and evaluates current practices for experimentally determining airplane center of gravity, moments of inertia, and products of inertia. The techniques discussed are applicable to bodies other than airplanes. In pitching- and rolling-moment-of-inertia investigations with the airplane mounted on and pivoted about knife edges, the non-linear spring moments that occur at large amplitudes of oscillation can be eliminated by using the proper spring configuration. The single-point suspension double-pendulum technique for obtaining yawing moments of inertia, products of inertia, and the inclination of the principal axis provides accurate results from yaw-mode oscillation data, provided that the sway-mode effects are minimized by proper suspension rig design. Rocking-mode effects in the data can be isolated. The conduct of the experiments, as well as the test setup used, is a major factor in obtaining accurate results.
Download or read book NASA Technical Note written by and published by . This book was released on 1962 with total page 532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Report written by United States. National Aeronautics and Space Administration and published by . This book was released on 1975 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Determining Inertias by Using the Amplitude Decay Rate of a Mechanical Oscillating System written by Gene T. Carpenter and published by . This book was released on 1962 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Calculation of Downwash Behind Supersonic Wings with an Application to Triangular Plan Forms written by Max A. Heaslet and published by . This book was released on 1948 with total page 726 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method is developed, consistent with the assumptions of small perturbation theory, which provides a means of determining for a known load distribution, the downwash behind a wing in supersonic flow. THe analysis is based upon the use of supersonic doublets which are distributed over the plan form and wake of the wing in a manner determined from the wing loading.
Download or read book Technical Note written by and published by . This book was released on 1954 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Accurate Method of Measuring the Moments of Inertia of Airplanes written by M. P. Miller and published by . This book was released on 1930 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt: This note contains a description of an improved apparatus and procedure used for determining the moments of inertia of airplanes. The method, based on the pendulum theory, is similar to that previously used, but a recent investigation of its accuracy has resulted in the improvements described herein. The error, when using the new apparatus and procedure, has been found to be of the order of 1 percent. Sample data and calculation for an airplane are included in an appendix.
Download or read book Theoretical Investigation and Application of Transonic Similarity Law for Two Dimensional Flow written by William Perl and published by . This book was released on 1950 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt: The transonic similarity law for two-dimensional flow derived by von Karman was investigated by an iteration procedure similar to that of the Rayleigh-Janzen and Ackeret-Prandtl-Glauert methods. The results, which show that the potential can be expressed as a power series in a single parameter that depends on Mach number, thickness ratio, and ratio of specific heats, are in agreement with those of von Karman. By the iteration procedure, the second approximation for the flow past a Kaplan section was obtained in similarity form. The exact solution by Kaplan for the second approximation was examined and found expressible in the same similarity form. The exact numerical results to three approximations obtained by Kaplan for the Kaplan section and the circular arc have been reduced to transonic similarity form.
Download or read book Vibration and Shock Isolation written by Charles E. Crede and published by . This book was released on 1951 with total page 360 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 1933 with total page 660 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 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 Report National Advisory Committee for Aeronautics written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1933 with total page 658 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 1933 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
