Download or read book Army Preliminary Evaluation YAH 1R Improved Cobra Agility and Maneuverability Helicopter Addendum written by Robert L. Stewart and published by . This book was released on 1975 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: Follow-on testing of the YAH-1R helicopter was conducted subsequent to the Army Preliminary Evaluation (APE) of that aircraft. In the six test flights, emphasis was placed on evaluating maneuvering stability in high-speed diving flight and on investigation of engine/rotor system static and dynamic droop characteristics. This report is intended to amplify and expand the APE report and is not a rewrite of that report. In a dive at 155 KIAS, the YAH-1R was found to have stable maneuvering stability at normal load factors below 1.4 and neutral maneuvering stability at load factors above 1.4. The engine/rotor system static and dynamic droop characteristics were unaltered from those described in the APE report. In response to requests, the Army Aviation Systems Command acted to increase the engine output shaft speed limit to 6900 rpm for 10 seconds independent of power. This new proposed engine limit greatly reduces the pilot workload during rapid deceleration maneuvers; however, the engine/rotor speed increase was unaltered and thus remains a shortcoming. No additional deficiencies or shortcomings were determined during this evaluation; the conclusions of the APE report were unaltered.
Download or read book Army Preliminary Evaluation YAH 1R Improved Cobra Agility and Maneuverability Helicopter written by Floyd L. Dominick (Jr.) and published by . This book was released on 1975 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: The United States Army Aviation Engineering Flight Activity conducted in 1975 on preliminary evaluation of the improved Cobra agility and maneuverability helicopter, designated the YAH-1R. During the test, 17 flights were flown for a total of 20.0 flight hours, 12.9 of which were productive. Testing was limited to an evaluation of aircraft handling qualities with emphasis on low-speed flight characteristics at gross weights of approximately 10,000 pounds. Numerous recommendations are made concerning improvement to the power management system of the YAH-1R helicopter. A total of 15 shortcomings were identified.
Download or read book Airworthiness and Flight Characteristics Evaluation YAH 1S Improved Cobra Agility and Maneuverability Helicopter written by Gary L. Skinner and published by . This book was released on 1975 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: Limited flight tests of a prototype aircraft were conducted at 3 test facilities at various altitudes. Testing concentrated on hover and level flight performance, controllability, and low-speed flight characteristics at heavy gross weight, high density altitude test conditions. The YAH-1S represents a significant improvement over the AH-1G/Q helicopter by virtue of its increased useful load-carrying capability, directional controllability and control margin, and hover performance capability. The control system characteristics of the YAH-1S failed to meet several requirements of applicable paragraphs of military specification MIL-H-8501A and the approved BHC deviations to MIL-H-8501A against which they were tested, but were still considered satisfactory. One shortcoming was noted.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1977 with total page 1160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of the American Helicopter Society written by American Helicopter Society and published by . This book was released on 1977 with total page 606 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government reports annual index written by and published by . This book was released on 199? with total page 1196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aeronautical Engineering written by and published by . This book was released on 1978 with total page 644 pages. Available in PDF, EPUB and Kindle. Book excerpt: A selection of annotated references to unclassified reports and journal articles that were introduced into the NASA scientific and technical information system and announced in Scientific and technical aerospace reports (STAR) and International aerospace abstracts (IAA).
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1976 with total page 708 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 1979 with total page 1186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA SP written by and published by . This book was released on 1978 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Army Preliminary Evaluation Improved Main Rotorblade Installed on AH 1R Helicopter written by Jerry R. Guin and published by . This book was released on 1976 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Operator s Manual written by and published by . This book was released on 1989 with total page 506 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fighting Helicopters of the 20th Century written by Christopher Chant and published by Tiger Books. This book was released on 1996 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: The early helicopter, from piston to turbine power, the turboshaft, the gunship helicopter, multi-role versability.
Download or read book Preliminary Airworthiness Evaluation AH 1S Helicopter Installed with Enhanced Cobra Armament System AH 1S ECAS written by Patrick J. Moe and published by . This book was released on 1979 with total page 129 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Airworthiness Evaluation Ah 1S Helicopter Installed with Enhanced Cobra Armanent System ah 1S ECAS written by Patrick J. Moe and published by . This book was released on 1979 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: The United States Army Aviation Engineering Flight Activity conducted a preliminary airworthiness evaluation of the Enhanced Cobra Armament System (ECAS) with the universal turret subsystem and M-197 20mm gun installed. The purpose of the test was to evaluate the effects of turret installation and weapons firing on the helicopter. Additionally, a limited stability and control evaluation of the helicopter (gun stowed) was conducted. Flight testing was performed at Yuma Proving Grounds, Arizona, and consisted of 27 flight test hours (15 productive).
Download or read book Preliminary Airworthiness Evaluation AH 1S MC Modernized Cobra Helicopter with External Fuel Tanks Installed written by John I. Nagata and published by . This book was released on 1984 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Preliminary Airworthiness Evaluation of the AH-1S Modernized Cobra, (S/N 69-16423) with the Kellett ferry tanks installed was conducted at Edwards Air Force Base, California (2302 feet) and Bakersfield, California (488 feet). Approximately 19 productive hours were flown during 24 flights between 17 March and 27 April 1984. The Kellett ferry tanks increased the equivalent flat plate area by 2.0 sq ft. One deficiency noted during the evaluation was the lack of crashworthiness of the external fuel tanks. Four shortcomings associated with the installation of the external fuel tanks were found.
Download or read book Army Preliminary Evaluation I and Research and Development Acceptance Test I AH 56A Cheyenne Compound Helicopter written by Floyd L. Dominick and published by . This book was released on 1972 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
