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 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 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 Estimating the Impact of Crashworthiness Standards on Mortality and Morbidity Events in the U S Army Rotary Wing Aircraft Mishaps written by and published by . This book was released on 1993 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: It is generally agreed that it is desirable to provide modern military helicopters with the maximum crashworthiness practical in order to reduce injury in helicopter crashes. Although crashworthy design features have been proven to be extremely effective in reducing morbidity and mortality, a penalty of increased weight and added procurement cost must be paid. Consequently, the degree of crashworthiness designed into an aircraft must be a tradeoff between economics, aircraft performance, and the perceived risk of injury. To help these judgments, it would be useful to develop a mathematical model capable of predicting morbidity outcomes for a given aircraft design. All crashes of five types of U.S. Army helicopters occurring between 1 October 1979 and 30 September 1991 were examined to determine crash conditions and morbidity and mortality outcomes. Analyses were conducted with logistic regression (LOGISTIC) for mortality and the fit of the model was considered.
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 U S Army H 25 Helicopter Drop Test 22 October 1960 written by James William Turnbow and published by . This book was released on 1961 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book U S Army H 25 Helicopter Drop Test 22 October 1960 written by James William Turnbow and published by . This book was released on 1961 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Helicopter Structural Crashworthiness written by Clifford I. Gatlin and published by . This book was released on 1971 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Crashworthy Helicopter Gunner s Seat Investigation written by U.S. Army Air Mobility Research and Development Laboratory. Eustis Directorate and published by . This book was released on 1975 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book YAH 63 Helicopter Crashworthiness Simulation and Analysis written by and published by . This book was released on 1983 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: Under its ongoing crash research testing program, the Army conducted drop test T-41 using a YAH-63 prototype helicopter as a test article. The YAH-63 was residual hardware from the AAH competition of the mid 70's and incorporated many crashworthy features, including a high energy landing gear, crushable fuselage structure, stroking crew seats, high strength retention of large masses, and a crash-resistant fuel system. The test was conducted in July 1981 at the NASA Langley Impact Dynamics Research Facility. Many onboard experiments were also evaluated in the drop test with participation from NASA, the Navy, and the Army. The KRASH results were compared to test and showed generally good agreement for landing gear energy absorption, fuselage crushing, nose structure failure, and copilot/gunner seat stroking and bottoming. The acceleration levels in the fuselage agreed well in the mid fuselage impact, but predicted levels were lower than test levels in the forward fuselage, probably due to the hard armament structure on the test article not represented in the KRASH model. The comparison of results was greatly facilitated by the DATAMAP program that processed both the test and KRASH data and automated the plotting, overplotting, scaling, filtering, and integrating of the data.
Download or read book U S Army H 25 Helicopter Drop Test written by and published by . This book was released on 1960 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of a study, funded by the Federal Aviation Administration (FAA), of helicopter Crash-Resistant Fuel Systems (CRFS). It covers the historical efforts that led to the current state of the art in military helicopter fuel systems and the more recent modifications to civil certification standards in Title 14 Code of Federal Regulations (CFR) Part 27 (Normal Category Rotorcraft) and Part 29 (Transport Category Rotorcraft). It describes the basic research, testing, field investigations, and production efforts that have led to the highly successful CRFS, that have saved many lives and have reduced the costs of accidents. While the hardware and fabrics are available today to create the CRFS, the adequacy of the integration of these items into existing and new civil fuel system designs cannot be assessed because of the lack of cuiTent field investigation data on civil helicopter crashes. This report reviews this problem, including the forms used for reporting and the current level of available data, which is essentially nonexistent. Training of field investigators in specific crashworthiness technology is of great importance, as well as the need for trained engineers in the design and certification process. A discussion of the civil and military crash environments is provided to give a background for the discussion of the need for reevaluation of the rationale used in establishing the current civil regulatory standards. The value of full-scale crash testing during the early development of the military CRFS is reviewed. The lack of any planned tests for the CRFS in current civil helicopters is an area of concern. A section of the study discusses the individual components of a CRFS, with guidance on the application of each item to the overall system design. This report provides guidance to designers looking for information about CRFS design problems and analytical tools for use in product improvements.
Download or read book Preliminary Information on Results of U S Army FSF Helicopter Crash Test Number 7 Conducted at Deer Valley Airport Phoenix Arizona 12 September 1962 written by Aviation Crash Injury Research and published by . This book was released on 1962 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Analysis of Helicopter Structural Crashworthiness Vol I Mathematical Simulation and Experimental Verification for Helicopter Crashworthiness written by Clifford I. Gatlin and published by . This book was released on 1971 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Helicopter Crashworthiness Research Program written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-05 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are presented from the U.S. Army-Aerostructures Directorate/NASA-Langley Research Center joint research program on helicopter crashworthiness. Through the on-going research program an in-depth understanding was developed on the cause/effect relationships between material and architectural variables and the energy-absorption capability of composite material and structure. Composite materials were found to be efficient energy absorbers. Graphite/epoxy subfloor structures were more efficient energy absorbers than comparable structures fabricated from Kevlar or aluminum. An accurate method predicting the energy-absorption capability of beams was developed. Farley, Gary L. and Boitnott, Richard L. and Carden, Huey D. Langley Research Center ...
Download or read book Army R D A written by and published by . This book was released on 1981 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Silent Knights written by Alan E. Diehl and published by . This book was released on 2007 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt:
