Download or read book Basic Principles of Helicopter Crashworthiness written by Dennis F. Shanahan and published by . This book was released on 1993 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Design of Helicopter Crashworthiness written by V. Giavotto and published by . This book was released on 1988 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The extensive use of composite materials in helicopter structures has prompted new research activities in crashworthiness in the last decade. A rational design of crashworthy structures requires a great deal of data and experience to be collected and organized; in particular the most efficient mechanisms of energy adsorption must be understood and carefully investigated and consequently the best structural concepts an detail design can be identified. With this aim and in cooperation with Augusta Helicopters a research program has been undertaken, covering many of the basic aspects of crashworthy design, i.e. dynamic modeling, design and verification procedures. (JES).
Download or read book Crashworthiness Design Features for Advanced Utility Helicopters written by Brian L. Carnell and published by . This book was released on 1975 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the 60s, the Eustis Directorate of the U.S. Army Air Mobility Research and Development Laboratory contracted with the Aviation Crash Injury Research (AvCIR) Group of the Flight Safety Foundation to define the Army aircraft crash environment and development design concepts and criteria to reduce injuries. For this study, the group investigated many accidents involving U.S. Army utility helicopters, conducted full-scale aircraft crash tests, evaluated aircraft crashworthiness, and developed crashworthiness design concepts. The examination showed that injuries, fatalities, and aircraft damage could have been reduced by improved design. The results were presented in USAAMRDL Technical Report 71-22, "Crash Survival Design Guide," which defines the hazards encountered in typical helicopter crashes. That document was used from the outset in design of the U.S. Army/Sikorsky UH-60A advanced utility helicopter with the objective of achieving an exceptional level of crashworthiness. To give some indication of the effectiveness of the crashworthy design achieved, we considered a fleet of 1,000 aircraft operating an average of 900 hours per aircraft per year. Our very conservative estimate shows that in 10 years of operation, 80 serious injuries could have been prevented and 200 lives saved. The crashworthy fuel system and crashworthy energy-absorbing landing gear and structure could save $58 million in material costs - $22 million saved by the fuel system and $36 million saved by the landing gear and structure. In addition, savings in personnel training and replacement would bring the estimated total savings to $78 million.
Download or read book Aircraft Crash Survival Design Guide Aircraft structural crashworthiness written by and published by . This book was released on 1980 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aircraft Crashworthiness written by Richard F. Chandler and published by SAE International. This book was released on 1995-01-01 with total page 423 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although isolated examples of crashworthiness can be found in aircraft which pre-date the designs of the Wright brothers, the first crashworthiness research project was undertaken in 1942 at Cornell University Medical College. The study investigated aircraft crashes to determine the causes of injuries and supported a development program for improving crashworthy design. The aviation industry quickly applied the results of the study, and by the early 1950s, crashworthy design features were incorporated into several airplanes. However, lack of consumer interest forced many of these designs to be dropped. In the 60s and 70s, most of the crashworthiness research pertained to military helicopter design. In the 80s, the lack of crashworthiness standards were seen as one reason for the increase in product liability litigation, bringing on a renewed interest in crashworthy design. In the 90s, aircraft crashworthiness is becoming an increasingly important issue with the push towards zero-tolerance of crashes. In a single source, Aircraft Crashworthiness brings together thirty technical papers which cover the past forty years of progress in this area.These papers were selected because of their significance in the development of crashworthiness technology. Aircraft Crashworthiness will be an ideal addition to the bookshelves of aerospace design engineers, airline industry safety personnel, government administrators, and anyone interested in the impact crashworthy design has on aircraft safety.
Download or read book Aircraft Crash Survival Design Guide Design criteria and checklists written by and published by . This book was released on 1980 with total page 284 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crashworthiness of Transportation Systems Structural Impact and Occupant Protection written by Jorge A.C. Ambrósio and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: A systematic treatment of current crashworthiness practice in the automotive, railroad and aircraft industries. Structural, exterior and interior design, occupant biomechanics, seat and restraint systems are dealt with, taking account of statistical data, current regulations and state-of-the-art design tool capabilities. Occupant kinematics and biomechanics are reviewed, leading to a basic understanding of human tolerance to impact and of the use of anthropometric test dummies and mathematical modelling techniques. Different types of restraining systems are described in terms of impact biomechanics. The material and structural behaviour of vehicle components is discussed in relation to crash testing. A variety of commonly used techniques for simulating occupants and structures are presented, in particular the use of multibody dynamics, finite element methods and simplified macro-elements, in the context of design tools of increasing complexity, which can be used to model both vehicles and occupants. Audience: An excellent reference for researchers, engineers, students and all other professionals involved in crashworthiness work.
Download or read book Army Helicopter Crashworthiness written by and published by . This book was released on 1983 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper discusses the evolution of crash survival design criteria, its influence on the formulation of a US Army military standard for rotary-wing aircraft crashworthiness, and its application to current and new-generation Army helicopters. Emphasis is given to the need for a total systems' approach in design for crashworthiness and the necessity for considering crashworthiness early in the design phase of a new aviation weapon systems development effort. The actual application of crashworthiness to Army helicopters is presented with statistics that show dramatic reductions in fatalities and injuries with implementation of a crashworthy fuel system. Current and planned US Army R & D to improve crashworthiness technology is discussed, including full-scale crash testing, human tolerance definition, improved energy absorbers, crew restraint systems, and crash impact characteristics of composite helicopter structures. Applicability of the work within Army helicopter crashworthiness to commercial/ civil helicopters is shown. The cost effective aspects of designing helicopters to be more crash survivable are also discussed.
Download or read book A Study of Helicopter Crash resistant Fuel Systems written by and published by . This book was released on 2002 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Program for the Development of Improved Helicopter Structural Crashworthiness Analytical and Design Techniques written by Gil Wittlin and published by . This book was released on 1973 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aircraft Crash Survival Design Guide Aircraft seats restraints litters and padding written by and published by . This book was released on 1980 with total page 556 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aircraft Crash Survival Design Guide Aircraft postcrash survival written by and published by . This book was released on 1980 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Review of Crashworthiness of Composite Aircraft Structures written by C. Poon and published by . This book was released on 1990 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: A review of major research activities in North America with respect to the crashworthiness of composite aircraft structures was performed with the goal of identifying potential Canadian contribution to R & D areas where effort would be required to complement the on-going programs in the United States. Recommendations include a study on the effect of aircraft size on crashworthiness design requirements; the implementation of the KRASH code in Canada to establish commonality in analytical methods with major U.S. and European users; an investigation on the energy absorption capabilities of the design features for small aircraft containing composite and/or composite/hybrid structures; and a parametric study on the crashworthiness design of composite-to-composite and composite-to-metal joints. (jes).
Download or read book Medical Aspects of Helicopter Safety and Crashworthiness written by D. F. Shanahan and published by . This book was released on 1984 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Helicopters are being used in increasing numbers for military operations in countries throughout the world. In the U.S. Army, helicopters comprise approximately 94 percent of the active fleet. While medical considerations for helicopter operations are much the same as for fixed wing operations, there are some differences of emphasis that will be reviewed. A review of the past 5 year's accident experience reveals that 80 percent are attributed to human error. It is shown that crew error is never a sufficient explanation for an accident. The relationship of errors to system deficiencies is established through human factors analysis. Once identifide, appropriate measures can be instituted to correct these deficiencies. Since current operational helicopters are not equipped with systems for inflight escape, crashworthiness is a key issue in their design. Principles of helicopter crashworthiness are reviewed, and the means for deriving these principles from crash injury analysis is discussed.
Download or read book Experimental Program for the Development of Improved Helicopter Structural Crashworthiness Analytical and Design Techniques Volume 1 Computerized Unsymmetrical Mathematical Simulation and Experimental Verification for Helicopter Crashworthiness in which Multidirectional Impact Forces are Present written by and published by . This book was released on 1973 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of a four-phase study to develop helicopter structural crashworthiness analytical and design techniques are presented. The study consisted of the development of a computer program (KRASH) and the verification of a mathematical model to predict the dynamic response during a survivable accident in which combined vertical and lateral impact velocities are present. Included in the study were a literature survey and evaluation, a detailed analysis of 32 accident cases, a drop test of a UH-1H helicopter with ground impact conditions of 23 fps vertical velocity and 18.6 fps lateral velocity, and parameter studies. It is concluded that program KRASH is capable of accurately predicting the dynamic responses during a multi-directional accident and that the program is a valuable tool with which to perform design tradeoff studies.
Download or read book Aircraft Crashworthiness written by K. Saczalski and published by . This book was released on 1975 with total page 724 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Program for the Development of Improved Helicopter Structural Crashworthiness Analytical and Design Techniques Volume 2 Test Data and Description of an Unsymmetrical Crash Analysis Computer Program Including a User s Guide and Sample Case written by and published by . This book was released on 1973 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt: Volume 2 contains supporting data for the details presented in Volume I. The report contains abstracts for the 32 technical reports reviewed during the program. Included in the literature survey section is a matrix categorization of the reports by subject and applicable areas of interest. A brief description is presented on STAGS, the LMSC computer program used to perform the analysis of the P2V-4 fuselage bumper. A comprehensive description of program KRASH is presented, including the theory, initial conditions, the User's Guide, and a sample problem. Twenty-six channels of recorded test data and film data are presented in another section. Additional analytical data are presented in the last section.
