Download or read book An Investigation Relating Longitudinal Pilot Induced Oscillation Tendency Ratings to Describing Function Predictions for Rate Limited Actuators Project MAX GAP written by and published by . This book was released on 2003 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of Project MAX QAP, a method of predicting pilot induced oscillations (PIO) caused by actuator rate limiting. The overall test objective was to correlate, if possible, Pilot-induced Oscillation Tendency Ratings with a new preflight calculation called the Gap Criterion. The Air Force Institute of Technology, Engineering Department (AFIT/ENY) requested this testing. The USAF Test Pilot School (TPS), Class 03A, conducted 8 flight test totaling 10.8 hours at Edwards AFB, California, from 16 to 22 October 2003.
Download or read book Prediction of Longitudinal Pilot Induced Oscillations Using the Optimal Control Model written by Steven W. Lindsey and published by . This book was released on 1989 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis evaluates the OCM in predicting handling qualities and PIO pilot ratings during the approach and landing task. Using two existing PIO databases, analytical prediction schemes were developed using the OCM. The prediction schemes used were flight path error and crossover frequency. The prediction schemes were applied to 12 different aircraft/flight control system landing configurations. The 12 configurations were flight tested using a USAF/Calspan variable stability NT-33A. The OCM was able to predict pilot handling qualities ratings (PHQR) accurately (within one pilot rating) 80% of the time. PIO ratings were accurately predicted 96% of the time. Due to a PIO rating problem in the original databases, the PIO prediction schemes were modified using flight test data. Additional flight test configurations should be flown to verify the revised flight path error and crossover frequency prediction schemes. Because of the subjective nature of PHQRs and PIO ratings, the flight test results varied between pilots. The correlation between multiengine pilots was better than with the fighter pilot. The crossover frequency prediction scheme was the most accurate predictor of pilot ratings, while the flight path error prediction scheme was slightly more accurate for PIO ratings. Both predictors agreed with classical control theory, showing correlation between flight path error, crossover frequency, and pilot/PIO ratings. The flight path error and crossover frequency rating prediction methods should be used as a tool in flight control system design. Variable stability aircraft; Flying qualities. (edc).
Download or read book Investigation of Pilot Induced Longitudinal Oscillation in the Douglas Model A4D 2 Airplane written by W. H. Terrill and published by . This book was released on 1957 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt: A stability analysis of the pilot-induced longitudinal oscillations on the Model A4D-2 is presented. Figures of merit for analyzing the system are chosen and numerous parameter variations are made to determine what can eliminate the oscillations. It is shown that the control system moment of inertia and the distance from the aircraft C.G. to the bob-weights can be selected to increase system stability. The revised control system which was considered suitable for the Board of Inspection and Survey trials is analyzed and is shown to have very favorable dynamic characteristics compared to the original system.
Download or read book From Archangel to Senior Crown written by Peter W. Merlin and published by AIAA (American Institute of Aeronautics & Astronautics). This book was released on 2008 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Lockheed Blackbirds hold a unique place in the development of aeronautics. In their day, the A-12, YF-12, M-21, D-21, and SR-71 variants outperformed all other jet airplanes in terms of altitude and speed. Now retired, they remain the only production aircraft capable of sustained Mach 3 cruise and operational altitudes above 80,000 feet.This is the first book to address the technical aspects of these incredible aircraft. The author describes the design evolution of the Blackbird, from the Archangel to the Senior Crown (the Air Force's SR-71.) He describes in detail the construction and materials challenges faced by Lockheed, as well as the Blackbird's performance characteristics and capabilities.A NASA historian, the author describes NASA's role in using the aircraft as a flying laboratory to collect data on materials, structures, loads, heating, aerodynamics, and performance for high-speed aircraft. The reader will benefit from the technical and programmatic lessons learned.This volume was produced in cooperation with the National Aeronautics and Space Administration.
Download or read book Lightning Protection of Aircraft written by Franklin Fisher and published by CreateSpace. This book was released on 2012-07-13 with total page 564 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an attempt to present under one cover the current state of knowledge concerning the potential lightning effects on aircraft and that means that are available to designers and operators to protect against these effects. The impetus for writing this book springs from two sources- the increased use of nonmetallic materials in the structure of aircraft and the constant trend toward using electronic equipment to handle flight-critical control and navigation function.
Download or read book On Subscale Flight Testing written by Alejandro Sobron and published by Linköping University Electronic Press. This book was released on 2018-11-05 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Downscaled physical models, also referred to as subscale models, have played an essential role in the investigation of the complex physics of flight until the recent disruption of numerical simulation. Despite the fact that improvements in computational methods are slowly pushing experimental techniques towards a secondary role as verification or calibration tools, real-world testing of physical prototypes still provides an unmatched confidence. Physical models are very effective at revealing issues that are sometimes not correctly identified in the virtual domain, and hence can be a valuable complement to other design tools. But traditional wind-tunnel testing cannot always meet all of the requirements of modern aeronautical research and development. It is nowadays too expensive to use these scarce facilities to explore different design iterations during the initial stages of aircraft development, or to experiment with new and immature technologies. Testing of free-flight subscale models, referred to as Subscale Flight Testing (SFT), could offer an affordable and low-risk alternative for complementing conventional techniques with both qualitative and quantitative information. The miniaturisation of mechatronic systems, the advances in rapid-prototyping techniques and power storage, as well as new manufacturing methods, currently enable the development of sophisticated test objects at scales that were impractical some decades ago. Moreover, the recent boom in the commercial drone industry has driven a quick development of specialised electronics and sensors, which offer nowadays surprising capabilities at competitive prices. These recent technological disruptions have significantly altered the cost-benefit function of SFT and it is necessary to re-evaluate its potential in the contemporary aircraft development context. This thesis aims to increase the comprehension and knowledge of the SFT method in order to define a practical framework for its use in aircraft design; focusing on low-cost, short-time solutions that don’t require more than a small organization and few resources. This objective is approached from a theoretical point of view by means of an analysis of the physical and practical limitations of the scaling laws; and from an empirical point of view by means of field experiments aimed at identifying practical needs for equipment, methods, and tools. A low-cost data acquisition system is developed and tested; a novel method for semi-automated flight testing in small airspaces is proposed; a set of tools for analysis and visualisation of flight data is presented; and it is also demonstrated that it is possible to explore and demonstrate new technology using SFT with a very limited amount of economic and human resources. All these, together with a theoretical review and contextualisation, contribute to increasing the comprehension and knowledge of the SFT method in general, and its potential applications in aircraft conceptual design in particular.
Download or read book Wingless Flight written by R. Dale Reed and published by University Press of Kentucky. This book was released on 2014-07-15 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most lifting bodies, or "flying bathtubs" as they were called, were so ugly only an engineer could love them, and yet, what an elegant way to keep wings from burning off in supersonic flight between earth and orbit. Working in their spare time (because they couldn't initially get official permission), Dale Reed and his team of engineers demonstrated the potential of the design that led to the Space Shuttle. Wingless Flight takes us behind the scenes with just the right blend of technical information and fascinating detail (the crash of M2-F2 found new life as the opening credit for TV's "The Six Million Dollar Man"). The flying bathtub, itself, is finding new life as the proposed escape-pod for the Space Station.
Download or read book Recommendations on the Transport of Dangerous Goods written by United Nations and published by . This book was released on 2020-01-06 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Manual of Tests and Criteria contains criteria, test methods and procedures to be used for classification of dangerous goods according to the provisions of Parts 2 and 3 of the United Nations Recommendations on the Transport of Dangerous Goods, Model Regulations, as well as of chemicals presenting physical hazards according to the Globally Harmonized System of Classification and Labelling of Chemicals (GHS). As a consequence, it supplements also national or international regulations which are derived from the United Nations Recommendations on the Transport of Dangerous Goods or the GHS. At its ninth session (7 December 2018), the Committee adopted a set of amendments to the sixth revised edition of the Manual as amended by Amendment 1. This seventh revised edition takes account of these amendments. In addition, noting that the work to facilitate the use of the Manual in the context of the GHS had been completed, the Committee considered that the reference to the "Recommendations on the Transport of Dangerous Goods" in the title of the Manual was no longer appropriate, and decided that from now on, the Manual should be entitled "Manual of Tests and Criteria".
Download or read book Report of the Presidential Commission on the Space Shuttle Challenger Accident written by DIANE Publishing Company and published by DIANE Publishing. This book was released on 1995-07 with total page 267 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Flight test guide for certification of transport category airplanes written by and published by . This book was released on 1986 with total page 104 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 Good Press. This book was released on 2023-12-28 with total page 279 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Smell of Kerosene: A Test Pilot's Odyssey encapsulates the daring and the danger inherent in the uncharted territories of early space and aircraft testing. The collection stands as a testimonial to the evolution of aeronautics, narrating the exhilarating experiences of test pilots and their indispensable role in shaping modern aviation and space exploration. Through a compilation of memoirs, technical reports, and firsthand accounts, the anthology presents a rich tapestry of literary styles, from the methodical precision of technical writing to the deeply personal and reflective tales of peril and perseverance. This diversity underscores the anthology's broader theme - the human spirit's unyielding quest for knowledge and conquest of the skies. The contributors, primarily from the National Aeronautics and Space Administration alongside notable figures like Donald L. Mallick and Peter W. Merlin, bring a wealth of experience and insight. Their backgrounds, ranging from engineering and test piloting to aerospace history, provide a comprehensive overview of the historical and technological context of air and space exploration. Their collective narratives not only honor the legacy of the fields pioneers but also highlight the interdisciplinary nature of aeronautics, where science meets human daring. The Smell of Kerosene is a must-read for anyone fascinated by the interface between human ambition and technological progress. It offers readers a unique opportunity to engage with the personal triumphs and challenges of those who have pushed the boundaries of what was technologically possible. This anthology serves not only as an educational resource but also as a source of inspiration, urging readers to contemplate the vastness of human achievement through the prism of aeronautics and space exploration. It invites a diverse audience, from academicians to enthusiasts, to dive into the depths of this pivotal era in aerospace history.
Download or read book L1 Adaptive Control Theory written by Naira Hovakimyan and published by SIAM. This book was released on 2010-09-30 with total page 333 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contains results not yet published in technical journals and conference proceedings.
Download or read book Computers Take Flight A History of NASA s Pioneering Digital Fly By Wire Project written by James E. Tomayko and published by . This book was released on 2000 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Airframe and Powerplant Mechanics Airframe Handbook written by United States. Flight Standards Service and published by . This book was released on 1976 with total page 620 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rotary Wing Aerodynamics written by W. Z. Stepniewski and published by Courier Corporation. This book was released on 2013-04-22 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt: DIVClear, concise text covers aerodynamic phenomena of the rotor and offers guidelines for helicopter performance evaluation. Originally prepared for NASA. Prefaces. New Indexes. 10 black-and-white photos. 537 figures. /div
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 Space Shuttle Missions Summary NASA TM 2011 216142 written by Robert D. Legler and published by www.Militarybookshop.CompanyUK. This book was released on 2011-09-01 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt: Full color publication. This document has been produced and updated over a 21-year period. It is intended to be a handy reference document, basically one page per flight, and care has been exercised to make it as error-free as possible. This document is basically "as flown" data and has been compiled from many sources including flight logs, flight rules, flight anomaly logs, mod flight descent summary, post flight analysis of mps propellants, FDRD, FRD, SODB, and the MER shuttle flight data and inflight anomaly list. Orbit distance traveled is taken from the PAO mission statistics.
