Download or read book Stress Analysis of the Phoenix Compacted Snow Runway to Support Wheeled Aircraft written by Ariana M. Sopher and published by . This book was released on 2017 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Landing wheeled aircraft on snow runways is uncommon and minimally documented. This report describes the modeling used to evaluate design and construction of the new compacted-snow Phoenix runway in Antarctica for the first wheeled C17 aircraft landing. Snow density from the target design and snow density of the as-built Phoenix runway structure were used to determine basic elastic parameters for use in layered elastic analysis formulation (LEAF). LEAF is part of a software package developed by the Federal Aviation Administration (FAA) that allows for forward calculation of runway stress, strain, displacement, and associated principal stress and strain based on design aircraft loading. Stress responses for the Phoenix runway were modeled for the C17, A319, and B757 aircraft. Two construction vehicles were also modeled for comparison. Results show the comparison of the stress profiles and effect of subgrade stiffness on stresses in the layers just above the subgrade. This is the first time the model was used for a snow runway and it provided valuable insight for design, construction and runway performance for the first landing of the C17 on compacted snow. The model is flexible enough for simulating additional aircraft that might use the runway in the future. The successful construction and use of the new compacted-snow Phoenix runway is significant and demonstrates the heaviest wheeled aircraft (C17) operating on a compacted snow runway, ever.
Download or read book Testing of a Compacted Snow Runway U written by James Arthur Bender and published by . This book was released on 1956 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: The processing of the snow for the runway, by modified pulvimixers using heat, was started on 6 July and completely finished by 1 September. Successful landings on the 200 x 10,000 ft strip were made by C-47, C-54, and C-124 type aircraft. The conclusion that the strip could support these aircraft and the decision to land the planes were based on the laboratory testing. This report describes the methods and techniques used in testing a snow runway built on deep snow, and gives suggested requirements of a snow runway to support various type aircraft. It is not intended as a report on the operational aspects of making such a runway, nor as a critique on the techniques used. Also, it should be realized that this represents the beginning of a long-range program and that additional theoretical work and field work are still necessary. (Author).
Download or read book Design Criteria for Snow Runways written by Gunars Abele and published by . This book was released on 1968 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: The physical characteristics of snow and those processes of metamorphism which contribute to its strength are important considerations in planning the construction of compacted snow runways. Two distinct temperature-dependent processes affect the physical properties of snow: sintering and strength increase with decreasing temperature. The rate of strength increase and the ultimate strength of snow may be greatly increased by mechanical agitation or depth processing followed immediately by surface compaction. Leveling to produce a smooth surface for aircraft is also necessary. Various combinations of processing and compaction are required depending on the size of aircraft to be operated on the runway. After construction is completed, the natural process of sintering or strengthening must be allowed to proceed for some time before aircraft operations can be initiated. The mechanical properties of processed snow have been correlated with its wheel-load supporting capacity. The correlation shows the effect of such parameters as wheel load, tire contact pressure, and repetitive wheel coverages on the required hardness or strength of a compacted snow layer. Strength profiles which can be expected from certain snow processing and compaction procedures are shown and compared with required strength profiles for various types of wheeled vehicles and aircraft. The purpose of this study was to combine the knowledge gained from fundamental research in the processes of sintering with methods and procedures developed by engineers for using snow as a construction material. (Author).
Download or read book An Experimental Snow Runway Pavement in Antarctica written by Gunars Abele and published by . This book was released on 1968 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: The strength properties of a Peter miller-processed and -compacted snow runway test strip at McMurdo, Antarctica, and the snow pavement performance during simulated C-130 and C-121 aircraft wheel-load tests are discussed and evaluated. The correlation of shear strength with ram hardness and unconfined compressive strength of high-density snow is discussed and an approximate relationship is developed. Data from actual aircraft and simulated aircraft wheel-load tests on snow pavements are compared with previously developed criteria for snow pavement supporting capacity. (Author).
Download or read book Snow Compaction Design Criteria and Test Procedures written by E. H Moser (Jr) and published by . This book was released on 1964 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Techniques and equipment are presently available for producing high-strength snow capable of supporting wheeled aircraft with tire inflation pressures up to 75 psi and gross weights up to 75,000 lbs. Current investigations in Antarctic are directed toward increasing the load-bearing capacity of compacted-snow runways on deep perennial snowfields up to 150,000 lbs. Existing criteria are given for the design of compactedsnow roads and runways on annual and perennial snowfields. The limitations of these criteria require that they be applied with judgment. Improved test equipment, instruments, and procedures are being developed to test the properties and trafficability of compacted snow. (Author).
Download or read book The Development of a Compressed Snow Runway for Wheeled Aircraft Near Casey written by D. S. Russell-Head and published by . This book was released on 1991 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ask the Pilot written by Patrick Smith and published by Penguin. This book was released on 2004 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt: Though we routinely take to the air, for many of us flying remains a mystery. Few of us understand the how and why of jetting from New York to London in six hours. How does a plane stay in the air? Can turbulence bring it down? What is windshear? How good are the security checks? Patrick Smith, an airline pilot and author of Salon.com's popular column, "Ask the Pilot," unravels the secrets and tells you all there is to know about the strange and fascinating world of commercial flight. He offers: A nuts and bolts explanation of how planes fly Insights into safety and security Straight talk about turbulence, air traffic control, windshear, and crashes The history, color, and controversy of the world's airlines The awe and oddity of being a pilot The poetry and drama of airplanes, airports, and traveling abroad In a series of frank, often funny explanations and essays, Smith speaks eloquently to our fears and curiosities, incorporating anecdotes, memoir, and a life's passion for flight. He tackles our toughest concerns, debunks conspiracy theories and myths, and in a rarely heard voice dares to return a dash of romance and glamour to air travel.
Download or read book Innovation with Purpose written by Lockheed Martin and published by . This book was released on 2013 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Unlimited Horizons written by Peter W. Merlin and published by . This book was released on 2015 with total page 293 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed as a stopgap measure to provide overhead reconnaissance capability during the early years of the Cold War, the versatile U-2 has since evolved to meet changing requirements well into the 21st century. Though many authors have documented the airplane's operational history, few have made more than a cursory examination of its technical aspects or its role as a NASA research platform. This volume includes an overview of the origin and development of the Lockheed U-2 family of aircraft with early National Advisory Committee for Aeronautics (NACA) and National Aeronautics and Space Administration (NASA) involvement, construction and materials challenges faced by designers and builders, releasable performance characteristics and capabilities, use of U-2 and ER-2 airplanes as research platforms, and technical and programmatic lessons learned.
Download or read book Finite Element Modeling of Tire terrain Interaction written by Sally Annette Shoop and published by . This book was released on 2001 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Advances in Soil Dynamics written by Shrinivasa K. Upadhyaya and published by . This book was released on 1994 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Operation Deep Freeze written by Ellery D. Wallwork and published by . This book was released on 2006 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Army Air Forces in World War II Men and planes written by and published by . This book was released on 1948 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technology and the Air Force written by Jacob Neufeld and published by DIANE Publishing. This book was released on 2009-06 with total page 344 pages. Available in PDF, EPUB and Kindle. Book excerpt: Proceedings of a symposium co-sponsored by the Air Force Historical Foundation and the Air Force History and Museums Program. The symposium covered relevant Air Force technologies ranging from the turbo-jet revolution of the 1930s to the stealth revolution of the 1990s. Illustrations.
Download or read book Flying Magazine written by and published by . This book was released on 2000-07 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The 2030 Spike written by Colin Mason and published by Routledge. This book was released on 2013-06-17 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: The clock is relentlessly ticking! Our world teeters on a knife-edge between a peaceful and prosperous future for all, and a dark winter of death and destruction that threatens to smother the light of civilization. Within 30 years, in the 2030 decade, six powerful 'drivers' will converge with unprecedented force in a statistical spike that could tear humanity apart and plunge the world into a new Dark Age. Depleted fuel supplies, massive population growth, poverty, global climate change, famine, growing water shortages and international lawlessness are on a crash course with potentially catastrophic consequences. In the face of both doomsaying and denial over the state of our world, Colin Mason cuts through the rhetoric and reams of conflicting data to muster the evidence to illustrate a broad picture of the world as it is, and our possible futures. Ultimately his message is clear; we must act decisively, collectively and immediately to alter the trajectory of humanity away from catastrophe. Offering over 100 priorities for immediate action, The 2030 Spike serves as a guidebook for humanity through the treacherous minefields and wastelands ahead to a bright, peaceful and prosperous future in which all humans have the opportunity to thrive and build a better civilization. This book is powerful and essential reading for all people concerned with the future of humanity and planet earth.
Download or read book Unbroken written by Laura Hillenbrand and published by Random House Trade Paperbacks. This book was released on 2014-07-29 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: #1 NEW YORK TIMES BESTSELLER • NOW A MAJOR MOTION PICTURE • Look for special features inside. Join the Random House Reader’s Circle for author chats and more. In boyhood, Louis Zamperini was an incorrigible delinquent. As a teenager, he channeled his defiance into running, discovering a prodigious talent that had carried him to the Berlin Olympics. But when World War II began, the athlete became an airman, embarking on a journey that led to a doomed flight on a May afternoon in 1943. When his Army Air Forces bomber crashed into the Pacific Ocean, against all odds, Zamperini survived, adrift on a foundering life raft. Ahead of Zamperini lay thousands of miles of open ocean, leaping sharks, thirst and starvation, enemy aircraft, and, beyond, a trial even greater. Driven to the limits of endurance, Zamperini would answer desperation with ingenuity; suffering with hope, resolve, and humor; brutality with rebellion. His fate, whether triumph or tragedy, would be suspended on the fraying wire of his will. Appearing in paperback for the first time—with twenty arresting new photos and an extensive Q&A with the author—Unbroken is an unforgettable testament to the resilience of the human mind, body, and spirit, brought vividly to life by Seabiscuit author Laura Hillenbrand. Hailed as the top nonfiction book of the year by Time magazine • Winner of the Los Angeles Times Book Prize for biography and the Indies Choice Adult Nonfiction Book of the Year award “Extraordinarily moving . . . a powerfully drawn survival epic.”—The Wall Street Journal “[A] one-in-a-billion story . . . designed to wrench from self-respecting critics all the blurby adjectives we normally try to avoid: It is amazing, unforgettable, gripping, harrowing, chilling, and inspiring.”—New York “Staggering . . . mesmerizing . . . Hillenbrand’s writing is so ferociously cinematic, the events she describes so incredible, you don’t dare take your eyes off the page.”—People “A meticulous, soaring and beautifully written account of an extraordinary life.”—The Washington Post “Ambitious and powerful . . . a startling narrative and an inspirational book.”—The New York Times Book Review “Magnificent . . . incredible . . . [Hillenbrand] has crafted another masterful blend of sports, history and overcoming terrific odds; this is biography taken to the nth degree, a chronicle of a remarkable life lived through extraordinary times.”—The Dallas Morning News “An astonishing testament to the superhuman power of tenacity.”—Entertainment Weekly “A tale of triumph and redemption . . . astonishingly detailed.”—O: The Oprah Magazine “[A] masterfully told true story . . . nothing less than a marvel.”—Washingtonian “[Hillenbrand tells this] story with cool elegance but at a thrilling sprinter’s pace.”—Time “Hillenbrand [is] one of our best writers of narrative history. You don’t have to be a sports fan or a war-history buff to devour this book—you just have to love great storytelling.”—Rebecca Skloot, author of The Immortal Life of Henrietta Lacks
