Download or read book Spin Yaw Lockin of an Elastic Finned Projectile written by Charles H. Murphy and published by . This book was released on 2004-08-01 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supersonic finned projectiles carrying very long dense metallic rods have been observed to have significantly large flexing motion. The appropriate Lagrangian for a pitching, yawing, rolling, and flexing missile is derived and the powerful finite element method used to construct differential equations for finite element parameters. These differential equations for constant spin are used to calculate frequencies and damping rates of transient motion and trim response motion to missile-fixed inertia and aerodynamic forcing terms associated with inelastic deformations. The results agree with earlier results based on a much more difficult iterative integration of a complex differential equation with unusual boundary conditions. Only three elements were necessary for reasonable accuracy, although codes for five and seven elements have been prepared and exercised. The finite element ordinary differential equations allowed calculation of the time history of missile motion with varying spin and demonstrated the occurrence of spin-yaw resonance at the aerodynamic frequency and at the lowest elastic frequency.
Download or read book Flight Motion of a Continuously Elastic Finned Missile written by Charles H. Murphy and published by . This book was released on 2002 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: The motion of elastic finned projectiles has been analyzed by various approximate theories. In this report the exact equations of small amplitude motion are derived for a symmetric missile. The aerodynamic and elastic symmetries are used to allow the use of complex variables to describe the lateral motion in a non-rotating coordinate system. Although the resulting equations are both ordinary and partial differential equations, frequencies and damping rates of free oscillations are obtained from an ordinary differential equation with boundary conditions. Equations for a permanently deformed bent missile are derived, and an ordinary differential equation for the forced motion of a bent missile is obtained. Sample calculations for a finned projectile with a fineness ratio of 20 show resonant motion at the aerodynamic frequency as well as at each elastic frequency. The nonlinear roll moment associated with a bent missile is computed and the location of possible spin-yaw lock-in is determined. The flight motion of an elastic missile is shown to be the sum of two elliptical motions: a low frequency pitching motion and a higher frequency flexing motion. The induced drag coefficients for both motions are computed as functions of the missile's elasticity.
Download or read book Aerospace America written by and published by . This book was released on 2003 with total page 786 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analytical and Experimental Investigation of Fin stabilized Projectile Spin Histories written by Michael Scott Yagley and published by . This book was released on 1989 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book PNS Parabolized Navier Stokes Computations for Spinning and Fin Stabilized Projectiles at Supersonic Velocities written by P. Weinacht and published by . This book was released on 1985 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Parabolized Navier-Stokes (PNS) computational technique has been applied to calculate the three-dimensional viscous flow about a standard spinning projectile and a long L/D finned projectile. The results for the spinning projectile are compared with past PNS computations and wind tunnel pressure and force measurements in order to benchmark the update version of the code. Excellent agreement is found and the improvements to the code are shown to provide greater computational efficiency. Results are then presented for the finned projectile configuration and comparison made with predictions from an inviscid code and values from a data base compiled from range firings. Keywords: Computational fluid dynamics; Finned projectiles; Three-dimensional flow; Supersonic viscous flow; Spinning projectiles.
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1998 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Spinning Projectile Instability Induced by an Internal Mass Mounted on an Elastic Beam written by and published by . This book was released on 1995 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: The steady-state motion of a loose internal component can cause flight instabilities. In previous work, these instabilities have been predicted in terms of the amplitude and phase of the component motion. In this report, for the case of a component mounted on an elastic beam, the amplitude and phase of the motion are predicted in terms of the beam characteristics and the component's mass properties. Thus, flight stability can be computed from design parameters. (MM).
Download or read book An Experimental Investigation of the Roll Rate of a Finned Projectile at Mach Numbers 1 5 and at Angles of Attack Up to 90 Deg written by James C. Uselton and published by . This book was released on 1972 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Free-spinning roll tests were conducted on a finned projectile model in the von Karman Facility (VKF) Supersonic Wind Tunnel (A). The tests were conducted at a Mach number of 1.50 and at a Reynolds number, based on model length, 2,200,000. Spin rate was obtained at angles of attack from 0 to 90 deg for fin cant angles of 0 and 2 deg. The zero cant angle fin configuration did not spin at any angle of attack. The spin rate for the 2-deg cant angle fin configuration decreased with angle of attack and had dual stable roll modes at some of the higher angles of attack. (Author).
Download or read book Design for Control of Projectile Flight Characteristics written by United States. Army Materiel Command and published by . This book was released on 1966 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1998 with total page 742 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Smell of Kerosene written by National Aeronautics and Space Administration and published by DigiCat. This book was released on 2022-11-13 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book puts the reader in the pilot's seat for a "day at the office" unlike any other. The Smell of Kerosene tells the dramatic story of a NASA research pilot who logged over 11,000 flight hours in more than 125 types of aircraft. Donald Mallick gives the reader fascinating first-hand description of his early naval flight training, carrier operations, and his research flying career with NASA. After transferring to the NASA Flight Research Center, Mallick became involved with projects that further pushed the boundaries of aerospace technology. These included the giant delta-winged XB-70 supersonic airplane, the wingless M2-F1 lifting body vehicle, and triple-sonic YF-12 Blackbird. Mallick also test flew the Lunar Landing Research Vehicle and helped develop techniques used in training astronauts to land on the Moon.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1983 with total page 1368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sierra Hotel flying Air Force fighters in the decade after Vietnam written by and published by DIANE Publishing. This book was released on 2001 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: In February 1999, only a few weeks before the U.S. Air Force spearheaded NATO's Allied Force air campaign against Serbia, Col. C.R. Anderegg, USAF (Ret.), visited the commander of the U.S. Air Forces in Europe. Colonel Anderegg had known Gen. John Jumper since they had served together as jet forward air controllers in Southeast Asia nearly thirty years earlier. From the vantage point of 1999, they looked back to the day in February 1970, when they first controlled a laser-guided bomb strike. In this book Anderegg takes us from "glimmers of hope" like that one through other major improvements in the Air Force that came between the Vietnam War and the Gulf War. Always central in Anderegg's account of those changes are the people who made them. This is a very personal book by an officer who participated in the transformation he describes so vividly. Much of his story revolves around the Fighter Weapons School at Nellis Air Force Base (AFB), Nevada, where he served two tours as an instructor pilot specializing in guided munitions.
Download or read book Wound Ballistics written by Beat P. Kneubuehl and published by Springer Nature. This book was released on 2022-08-11 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: The definitive interdisciplinary reference work for wound ballistics Basics The book begins by providing the necessary basic knowledge about physics, ballistics and ammunition and weapons. Then it describes the behaviour of projectiles in humans and animals (the physics of gunshot injuries) and introduces the experimental simulation of gunshot wounds, including the materials suitable for this purpose. Applications These basic principles can be applied in forensic medicine and criminalistics. The gunshot wound provides some forensic traces and the experimental reconstruction helps to understand the dynamic crime process. The wounding potential of non-lethal weapons can be determined. In emergency and war surgery, injuries caused by small arms bullets and fragments as well as by gas jets (of gas weapons) can be assessed. International conventions could be freed from undefined terms (such as “unnecessary suffering”) with the help of physical quantities. Reference work Detailed tables as e. g. ballistic data of numerous cartridge types, also older ones, material properties, as well as many otherwise difficult to access data and a trilingual glossary of ballistic and technical terms in the languages German, English and French. NEW Wound Ballistics of European Police ammunition References to recent research results Partly coloured illustrations Due to the increase in terrorist and criminal activities worldwide, it is not only members of the armed forces who are affected. Surgeons, forensic doctors, police officers and criminalists also need to know and be able to assess the specifics of gunshot wounds.
Download or read book Low Speed Wind Tunnel Testing written by Jewel B. Barlow and published by John Wiley & Sons. This book was released on 1999-02-22 with total page 738 pages. Available in PDF, EPUB and Kindle. Book excerpt: A brand-new edition of the classic guide on low-speed wind tunnel testing While great advances in theoretical and computational methods have been made in recent years, low-speed wind tunnel testing remains essential for obtaining the full range of data needed to guide detailed design decisions for many practical engineering problems. This long-awaited Third Edition of William H. Rae, Jr.'s landmark reference brings together essential information on all aspects of low-speed wind tunnel design, analysis, testing, and instrumentation in one easy-to-use resource. Written by authors who are among the most respected wind tunnel engineers in the world, this edition has been updated to address current topics and applications, and includes coverage of digital electronics, new instrumentation, video and photographic methods, pressure-sensitive paint, and liquid crystal-based measurement methods. The book is organized for quick access to topics of interest, and examines basic test techniques and objectives of modeling and testing aircraft designs in low-speed wind tunnels, as well as applications to fluid motion analysis, automobiles, marine vessels, buildings, bridges, and other structures subject to wind loading. Supplemented with real-world examples throughout, Low-Speed Wind Tunnel Testing, Third Edition is an indispensable resource for aerospace engineering students and professionals, engineers and researchers in the automotive industries, wind tunnel designers, architects, and others who need to get the most from low-speed wind tunnel technology and experiments in their work.
Download or read book The Anatomy of the Gyroscope written by Frank W. Cousins and published by . This book was released on 1988 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Living and Working in Space written by William David Compton and published by Courier Corporation. This book was released on 2013-05-13 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: The official record of America's first space station, this book from the NASA History Series chronicles the Skylab program from its planning during the 1960s through its 1973 launch and 1979 conclusion. Definitive accounts examine the project's achievements as well as its use of discoveries and technology developed during the Apollo program. 1983 edition.
