Download or read book Moments of Inertia of Several Airplanes written by Marvel P. Miller and published by . This book was released on 1931 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The National Advisory Committee for Aeronautics has adopted the practice of measuring the moments of inertia of all airplanes that become available through their use in flight research work. This paper, which is the first of a series presenting the results of such measurements, gives the momumental ellipsoids of ten army and naval biplanes and one commercial monoplane. The data wer obtained by the use of a pendulum method, previously described. The moments of inertia are expressed in coeffienct as well as in dimensional form, so that those for airplanes of widely spaced different weights and dimensions can be compared. The coefficients are also useful for estimating the moments of inertia of airplanes for which no measurements of inertia can be computed. To determine the accuracy with which the moments of inertia can be computed from design data, calculations were made of the monents of inertia for one of the above airplanes by summing up the moments of inertia of its constituent parts. It was found that computed values were in error 20, 10, and 5 percent for the X, Y, and Z axes, respectively.
Download or read book Measurement of the Longitudinal Moment of Inertia of a Flexible Airplane written by Henry A. Cole and published by . This book was released on 1956 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The application and results of the above method in ground oscillation tests are described. The various corrections to reduce the measured moment of inertia to the reference axis moment of inertia are presented. The results show that measurement of moment of inertia by this method is practicable, provided the knife edges and spring are arranged to minimize excitation of structural modes.
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 The Effect of Variations in Moments of Inertia on Spin and Recovery Characteristics of a Single engine Low wing Monoplane with Various Tail Arrangements Including a Twin Tail written by Anshal I. Neihouse and published by . This book was released on 1948 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of an investigation made in the Langley 15-foot free-spinning tunnel of the effects of variation of the moment of inertia of a research model representative of a present-day trainer or a four-place cabin monoplane are presented. Eight different wing arrangements and four different tail arrangements, including a twin tail, were tested. The moments of inertia about the three airplane axes were increased or decreased by a constant percentage and the results were compared. These results were also compared with results previously presented for variation of the airplane relative density.
Download or read book Moments of Inertia of Airplanes written by Marvel P. Miller and published by . This book was released on 1931 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measured Moments of Inertia of 32 Airplanes written by WIlliam Gracey and published by . This book was released on 1940 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: A compilation of the experimentally determined moments of inertia of 32 airplanes is presented. The measurements were obtained at the laboratories of the NACA by means of a pendulum method. The airplanes tested are representative of several types of aircraft of gross weight less than 10,000 pounds.
Download or read book The Characteristics of 78 Related Airfoil Section from Tests in the Variable density Wind Tunnel written by Eastman Nixon Jacobs and published by . This book was released on 1933 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Notes on the Stalling of Vertical Tail Surfaces and on Fin Design written by F. L. Thompson and published by . This book was released on 1940 with total page 566 pages. Available in PDF, EPUB and Kindle. Book excerpt: It may be concluded that the stalling of vertical tail surfaces is not in itself a dangerous condition. Provided sufficient directional stability exists at large angles of sideslip, the tail stall may occur with modern airplanes, as with those of the past, without the knowledge of or concern to the pilot.
Download or read book Technical Note written by and published by . This book was released on with total page 626 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 1958 with total page 1076 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 Report written by United States. National Advisory Committee for Aeronautics and published by . This book was released on 1937 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1991 with total page 296 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 1930 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of the Moments of Inertia of an Airplane by a Simplified Method written by Howard L. Turner and published by . This book was released on 1950 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: The moments of inertia about the body reference axes, the principal axes, the product of inertia, and the inclination of the principal axes were determined experimentally for a 13,000-pound airplane. Descriptioin of the equipment and techniques and sample calculations are presented. Knife-edge supports and restraining springs were used for measurements about the pitch and roll axes. A single-shaft torsional pendulum was used for yaw-axis measurement. Simplicity of operation, ease of handling, adaptability to very heavy aircraft, and inherent accuracy of the methods are discussed.
Download or read book The Experimental Determination of the Moments of Inertia of Airplanes written by Hartley A. Soulé and published by . This book was released on 1933 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Calculation of the Mass Moments of Inertia of Aircraft written by Chester Haggard and published by . This book was released on 1956 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt:
