Download or read book Analysis of Helicopter Air to air Combat Tests written by Kenneth B. Amer and published by . This book was released on 1993 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The U.S. Army's Aviation Applied Technology Directorate has sponsored a series of helicopter air-to-air combat tests. These tests came about from the belief that a very serious threat to an attack helicopter is another attack helicopter. This paper analyzes the results of these tests to establish the most important helicopter design parameters in terms of maneuverability and agility for superior helicopter air-to-air capability. From the results of these analyses the author concludes that the most important design maneuverability/agility parameters for superior helicopter air-to-air capability are (1) roll angular acceleration per inch of stick travel, (2) roll damping/inertia (inverse of time constant), (3) maximum rate of climb, (4) maximum yaw rate, and (5) cockpit visibility (tandem seating). The impact of the importance of these parameters on the design of a scout/attack helicopter is discussed.

Download or read book Helicopter Air to Air Combat Test 4 AACT 4 Maneuverability Analysis written by and published by . This book was released on 1992 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the data and findings from the AACT IV flight test program sponsored by AATD. One-on-one air-to-air combat tests of the AH-1S Cobra, AH-64A Apache, SA-365N-1 Dauphin, and 406 Combat Scout helicopters were conducted for maneuverability and agility effectiveness. The tests were flown at the Naval Air Test Center (NATC), Patuxent River, Maryland, from 22 March to 30 April 1987. Flights performed totaled 18, with 22 hours of productive flight time. Total NATC onsite flight time was approximately 87 hours, including instrumentation check flights, maintenance flights, one-on-one familiarization flights, and data flights. The performance of the aircraft involved in AACT IV and analysis of their contributions in an air-to-air environment are discussed. Air vehicle subsystems and other vehicle flight test configuration initiatives used in AACT IV are also described. The AACT IV general findings include: (1) cockpit field of view should be unobstructed and as extensive as possible; (2) time to turn should be minimized for best air combat maneuvering (ACM) performance; (3) high specific excess power at mission weight is necessary for increased maneuverability; (4) the pilot should be given full ACM potential without constant attention to envelope limits; (5) turreted weapons provide added kill probability but do not mitigate maneuverability, and-(6) the performance characteristics of teetering rotor systems during ACM are not conducive to the close-range air-to-air environment. A major shortcoming of the test program was the lack of consistent laser weapon simulator ballistic hit/ miss and aiming error quantitative data.

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.

Download or read book A Piloted Simulation of Helicopter Air Combat to Investigate Effects of Variations in Selected Performance and Control Response Characteristics written by Michael S. Lewis and published by . This book was released on 1987 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Piloted Simulation of One on one Helicopter Air Combat at NOE Flight Levels written by and published by . This book was released on 1985 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: A piloted simulation designed to examine the effects of terrain proximity and control system design on helicopter performance during one-on-one air combat maneuvering (ACM) is discussed. The NASA Ames Vertical Motion Simulator (VMS) and the Computer Generated Imagery (CGI) systems were modified to allow two aircraft to be independently piloted on a single CGI data base. Engagements were begun with the blue aircraft already in a tail-chase position behind the red, and also with the two aircraft originating from positions unknown to each other. Maneuvering was very aggressive and safety requirements for minimum altitude, separation, and maximum bank angles typical of flight test were not used. Results indicate that the presence of terrain features adds an order of complexity to the task performed over clear air ACM and that a mix of attitude and rate command-type Stability and Control Augmentation System (SCAS) design may be desirable. The simulation system design, the flight paths flown, and the tactics used were compared favorably by the evaluation pilots to actual flight test experiments. Keywords include: Helicopter; Rotorcraft; Air combat; NOE(Nap Of the Earth); Flight control systems.

Download or read book Findings from Fixed gun Air to air Combat Tests Involving Both Foreign and U S Helicopters written by Joseph A. Wolfrom and published by . This book was released on 1986 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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

Download or read book A Guide for Design Conduct and Analysis of Air Force Tests written by United States. Air Force. Systems Command and published by . This book was released on 1966 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Descriptive Summaries for Program Elements of the Research Development Test and Evaluation Army Program FY U written by and published by . This book was released on 1987 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Air to Air Combat Test AACT II Maneuvering Flight Loads for UH 60A and AUH 76 Helicopters written by Kevin W. Washuta and published by . This book was released on 1986 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Descriptive Summaries for Program Elements of the Research Development Test and Evaluation Army Program FY 1987 U February 1986 written by and published by . This book was released on 1986 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book United States Army Aviation Digest written by and published by . This book was released on 1988 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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.

Download or read book Data Presentation from Air to Air Combat Maneuvering Between an S 76 and a UH 60A written by Joseph A. Wolfrom and published by . This book was released on 1985 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents data measured during one-on-one air-to-air maneuvering tests involving Army UH-60A and Sikorsky S-76 helicompters. The engagements included preplanned manuevering engagements as well as unstructured engagements in which both helicopters were maneuvered agressively to gain a tactical advantage. The test program was conducted during July 1983 a the Naval Air Test Center, Patuxent River, Maryland, and included the OH-58A in addition to the two helicopters mentioned above. This report contains data only on the S-76 and UH-60A; data from the OH-58A has been published in two separate reports. The data for each helicopter are presented in the form of time histories of the various parameters of the various parameters as measured during the maneuvers. The parameters for which data are presented include aircraft position in space, pitch, roll, and sideslip attitueds; pitch, roll, and yaw rates; control positions; load factor; airspeed; rotor speed; altitude; and engine torque. In addition to the tie histories, several of the parameters are cross-plotted using time as the associating variable. These cross-plots permit a ready assessment of the flight envelope utilized by each helicopter during the air combat maneuvering. Originator-supplied keywords: Maneuverability; Agility; Air-to-Air combat; Manuevers; Flight testing; and Data acquisition and instrumentation.

Download or read book Rotorcraft helicopter Written Test Guide written by United States. Federal Aviation Administration and published by . This book was released on 1967 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1967 with total page 866 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Impact of Flying Qualities on Mission Effectiveness for Helicopter Air Combat Volume 1 written by and published by . This book was released on 1983 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt: