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ISBN 13 :
Total Pages : 41 pages
Book Rating : 4.:/5 (14 download)
Download or read book Preliminary Flight Test Data : UH-2A Jet Augmented Research Helicopter written by and published by . This book was released on 1965 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : W. E. BLACKBURN
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.:/5 (227 download)
Download or read book Uh-2 Jet-augmented High-speed Research Helicopter Maneuverability and Dynamic Stability Evaluation written by W. E. BLACKBURN and published by . This book was released on 1965 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results of a flight research program conducted to determine the effect of horizontal thrust augmentation on the maneuverability and dynamic stability characteristics of the UH-2 high-speed jet-augmented research helicopter are presented. The research aircraft, instrumentation, and test program are described. A standard Kaman UH-2 helicopter was modified by the addition of a General Electric YJ85 jet engine mounted on the right side of the fuselage for horizontal thrust augmentation. Transient and steady-state load factor maneuvers were examined at various airspeeds and levels of jet augmentation. The maneuver envelope is shown to be expanded by unloading the main rotor through the application of horizontal thrust augmentation. The dynamic stability characteristics of the research vehicle are shown to be basically similar to the standard UH-2. The addition of thrust augmentation tends to increase damping in pitch and yaw and reduce control sensitivity. (Author).
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ISBN 13 :
Total Pages : 780 pages
Book Rating : 4.E/5 ( download)
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 780 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 1134 pages
Book Rating : 4.:/5 (31 download)
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1989 with total page 1134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 98 pages
Book Rating : 4.:/5 (317 download)
Download or read book Flight Test Identification and Simulation of a UH-60A Helicopter and Slung Load written by and published by . This book was released on 2001 with total page 98 pages. Available in PDF, EPUB and Kindle. Book excerpt: Helicopter slung-load operations are common in both military and civil contexts. Helicopters and loads are often qualified for these operations by means of flight tests, which can be expensive and time consuming. There is significant potential to reduce such costs both through revisions in flight-test methods and by using validated simulation models. To these ends, flight tests were conducted at Moffett Field to demonstrate the identification of key dynamic parameters during flight tests (aircraft stability margins and handling-qualities parameters, and load pendulum stability), and to accumulate a data base for simulation development and validation. The test aircraft was a UH-60A Black Hawk, and the primary test load was an instrumented 8- by 6- by 6-ft cargo container. Tests were focused on the lateral and longitudinal axes, which are the axes most affected by the load pendulum modes in the frequency range of interest for handling qualities; tests were conducted at airspeeds from hover to 80 knots. Using telemetered data, the dynamic parameters were evaluated in near real time after each test airspeed and before clearing the aircraft to the next test point. These computations were completed in under 1 min. A simulation model was implemented by integrating an advanced model of the UH-60A aerodynamics, dynamic equations for the two-body slung-load system, and load static aerodynamics obtained from wind-tunnel measurements. Comparisons with flight data for the helicopter alone and with a slung load showed good overall agreement for all parameters and test points; however, unmodeled secondary dynamic losses around 2 Hz were found in the helicopter model and they resulted in conservative stability margin estimates.
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ISBN 13 :
Total Pages : 21 pages
Book Rating : 4.:/5 (14 download)
Download or read book Preliminary Flight Test Data : UH-2 Jet Compund Research Helicopter Flight Test Program written by and published by . This book was released on 1965 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Monthly Catalog of United States Government Publications written by and published by . This book was released on 1965 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 1576 pages
Book Rating : 4.:/5 (319 download)
Download or read book Government-wide Index to Federal Research & Development Reports written by and published by . This book was released on 1966 with total page 1576 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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ISBN 13 :
Total Pages : 1042 pages
Book Rating : 4.0/5 ( download)
Download or read book U.S. Government Research & Development Reports written by and published by . This book was released on 1968 with total page 1042 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : ARMY TRANSPORTATION RESEARCH COMMAND FORT EUSTIS VA.
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ISBN 13 :
Total Pages : 59 pages
Book Rating : 4.:/5 (227 download)
Download or read book Preliminary Flight Test Data. Uh-2a with Horizontal Thrust Augmentation Provided by a Yj-85 Turbo-jet Engine written by ARMY TRANSPORTATION RESEARCH COMMAND FORT EUSTIS VA. and published by . This book was released on 1964 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report summarizes the flight testing conducted on UH-2 helicopter BuNo. 147978, modified by the installation of a YJ85 turbo-jet engine for auxiliary propulsion, during the period 22 January 1964 through 3 Apr 1964. A total of 42 flights, involving 28.3 hours of aircraft time were conducted. (Author).
Author : Alastair Cooke
Publisher : John Wiley & Sons
ISBN 13 : 1405172541
Total Pages : 384 pages
Book Rating : 4.4/5 (51 download)
Download or read book Helicopter Test and Evaluation written by Alastair Cooke and published by John Wiley & Sons. This book was released on 2009-02-12 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: Although a number of texts on helicopter aerodynamics have been written, few have explained how the various theories concerning rotorborne flight underpin practical flight test and evaluation. This book combines theoretical information on aerodynamics, stability, control and performance with details of evaluation methodologies and practical guidance on the conduct of helicopter flight tests. For each topic the relevant theory is explained briefly and followed by details of the practical aspects of testing a conventional helicopter. These include: * safety considerations * planning the tests * the most efficient way to conduct individual flights Where possible typical test results are presented and discussed. The book draws on the authors' extensive experience in flight test and flight test training and will appeal not only to professionals working in the area of rotorcraft test and evaluation, but also to helicopter pilots, rotorcraft designers and manufacturers and final year undergraduates of aeronautical engineering
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ISBN 13 :
Total Pages : 1250 pages
Book Rating : 4.F/5 ( download)
Download or read book Government Reports Announcements written by and published by . This book was released on 1968 with total page 1250 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : ARMY AVIATION MATERIEL LABS FORT EUSTIS VA.
Publisher :
ISBN 13 :
Total Pages : 80 pages
Book Rating : 4.:/5 (227 download)
Download or read book Preliminary Flight Data on the Compound High Performance Uh-i Helicopter written by ARMY AVIATION MATERIEL LABS FORT EUSTIS VA. and published by . This book was released on 1965 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: The results are presented of the flight tests of the maneuver envelope and specific flights for the purpose of obtaining stability and control data. The maneuver data are given in Section 1 and the stability and control data are given in Section 2. All data shown must be considered preliminary and subject to change. (Author).
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ISBN 13 :
Total Pages : 18 pages
Book Rating : 4.:/5 (14 download)
Download or read book Preliminary Flight Test Data : UH-1 Compund Research Helicopter Flight Test Program written by and published by . This book was released on 1965 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Allen H. McCoy
Publisher :
ISBN 13 :
Total Pages : 96 pages
Book Rating : 4.:/5 (317 download)
Download or read book Flight Testing and Real-Time System Identification Analysis of a UH-60A Black Hawk Helicopter with an Instrumented External Sling Load written by Allen H. McCoy and published by . This book was released on 1997-12 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Historically, helicopter and load combinations have been qualified through flight testing, requiring considerable time and cost. With advancements in simulation and flight test techniques, there is potential to substantially reduce costs and increase the safety of helicopter sling load certification. Validated simulation tools make possible accurate prediction of operational flight characteristics before initial flight tests. Real time analysis of test data improves the safety and efficiency of the testing programs. To advance these concepts, the US Army and NASA, in cooperation with the Israeli Air Force and Technion, under a Memorandum of Agreement, seek to develop and validate a numerical model of the UH-60 with sling load and demonstrate a method of near real time flight test analysis. This thesis presents results from flight tests of a US Army Black Hawk helicopter with various external loads. Tests were conducted as the US first phase of this MOA task. The primary load was a container express box (CONEX), which contained a compact instrumentation package. The flights covered the airspeed range from hover to 70 knots. Primary maneuvers were pitch and roll frequency sweeps, steps, and doublets. Results of the test determined the effect of the suspended load on both the aircraft's handling qualities and it's control system's stability margins. Included were calculations of the stability characteristics of the load's pendular motion. Utilizing CIFER software, a method for near-real time system identification was also demonstrated during the flight test program.
Author : Thomas H. Lawrence
Publisher :
ISBN 13 :
Total Pages : 586 pages
Book Rating : 4.:/5 (227 download)
Download or read book Helicopter Maneuverability and Agility Design Sensitivity and Air Combat Maneuver Data Correlation Study written by Thomas H. Lawrence and published by . This book was released on 1991 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: A helicopter maneuverability and agility (M/A) study has been conducted to determine the characteristics of eight different helicopters. This study included a simulation evaluation, analysis of data from the U.S. Army's Air-to-Air Combat Tests (AACT) and a correlation of the two. The results validated previously developed M/A design guidelines and design parameter sensitivities. The helicopters evaluated were the UH-60A, S-76A, AH-64A, AH-1S, OH-58A and SA-365N-1. The CH-53E and Soviet Mi-28 (unclassified) were also analyzed although no AACT data were available for them. The M/A characteristics of these vehicles were assessed by flying detailed, blade element General Helicopter Flight Dynamics Simulation (GenHel) computer models through a series of nine discrete maneuvers. Selected flight test data from AACT II, III and IV were analyzed using a workstation to replay the data and generate synthetic out-of-cockpit views. A method for scoring the simulated maneuvers and the AACT engagements was devised. M/A ratings for all of the subject aircraft were determined using the simulated maneuver scores. Correlation of the M/A ratings to the AACT scores was very good with the winning air combat aircraft having the highest M/A rating in four of the five engagement pairs analyzed. This study also produced a unique database employing a common simulation technology and evaluation methodology for all of the subject helicopters.
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ISBN 13 :
Total Pages : 1070 pages
Book Rating : 4.3/5 (91 download)
Download or read book Bibliography of Scientific and Industrial Reports written by and published by . This book was released on 1968-04 with total page 1070 pages. Available in PDF, EPUB and Kindle. Book excerpt:
