Download or read book Army Preliminary Evaluation YOH 58A Helicopter with a Flat Plate Canopy written by James R. Arnold and published by . This book was released on 1975 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: A limited evaluation of the performance and handling qualities of the OH-58A helicopter was conducted to determine the effects of a four-plane flat-plate canopy installation. Testing was conducted at the Bell Helicopter Company flight test facility at Arlington, Texas, from 25 October through 4 November 1975. Personnel from the United States Army Aviation Engineering Flight Activity conducted 11 test flights for a total of 6.5 productive test flight hours. The evaluation revealed a loss in airspeed of 2 and 6 knots at the airspeed for maximum continuous power and a loss in range of 8 and 23 nautical miles at the cruise airspeed (forward and aft center-of-gravity configurations, respectively). The noticeable changes in the handling qualities were a slight increase in the nose-down pitching rate following a sudden loss of power (more pronounced for the forward center-of-gravity configuration) and a slight increase in the dihedral effect of the helicopter. The flat-plate canopy installation resulted in a slight reduction in the field of view, but visibility was improved due to the optical clarity of the flat-plate. The installation of glare shields between the chin bubble and canopy significantly reduced the canopy reflections during both day and night tests. One shortcoming was noted during this evaluation but cannot be attributed to the flat-plate canopy installation. (Author).
Download or read book Army Preliminary Evaluation YAH IQ Helicopter with a Flat Plate Canopy written by James R. Arnold and published by . This book was released on 1975 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: The United States Army Aviation Engineering Flight Activity conducted a limited evaluation of the level flight performance and handling qualities of a YAH-1Q helicopter with a flat-plate canopy from 17 through 19 June 1975 at the Bell Helicopter Company flight test facility at Arlington, Texas. During the test program, eleven flights for a total of 4.4 productive hours were flown. A loss in maximum airspeed for level flight was determined when compared to the AH-1G (Bell Helicopter Company data indicate 5 to 7 knots). The primary effect of the flat-plate canopy on handling qualities was a noticeable decrease in directional stability. The one deficiency determined during the evaluation was the internal reflection from external light sources on the flat-plate canopy during night flight. Five shortcomings were noted during the evaluation. Further testing should be conducted to determine the effect of the decreased directional stability on the accuracy of rocket fire.
Download or read book Army Preliminary Evaluation YAH 1S Helicopter with Modified Flat Plate Canopy Installed written by James R. Arnold and published by . This book was released on 1977 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: The United States Army Aviation Engineering Flight Activity conducted an Army Preliminary Evaluation of the YAH-1S helicopter to determine the effect of the modified flat plate canopy installation on performance and combined effects of the canopy and the Kaman K-747 rotor on handling qualities. The helicopter was tested from 18 March through 15 June 1977 at Edwards Air Force Base, California. During the test, 28 flights totaling 23.8 productive flight hours were flown. The increase in equivalent flat plate area due to the modified flat plate canopy installation was approximately 3 square feet. Two deficiencies noted during this evaluation were the high intensity of mirror images of both internal and external light sources on the modified flat plate canopy during night flight and the design/location of the night vision goggle switch, which is conductive to inadvertent deactivation of the visual fault warning system. A total of nine shortcomings were noted. (Author).
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1977 with total page 1078 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 Army Preliminary Evaluation Prototype OH 58A Helicopter with XM27E1 Weapon Subsystem written by John Nagata and published by . This book was released on 1970 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Army Preliminary Evaluation of the OH-58A prototype helicopter was conducted in the vicinity of Arlington, Texas, during the period 26 June to 9 July 1969. Thirteen test flights were conducted for a total of 14.5 hours of which 9.1 hours were productive. The evaluation consisted of limited quantitative and qualitative stability and control tests in the armed scout configuration only. The handling qualities of the OH-58A are satisfactory for the accomplishment of the armed scout mission. (Author).
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 Army Preliminary Evaluation JOH 58A Helicopter with Low Reflective Paint and Infrared Countermeasure Exhaust System written by Charles L. Thomas and published by . This book was released on 1975 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: The United States Army Aviation Engineering Flight Activity conducted an Army Preliminary Evaluation of a JOH-58A helicopter painted with a low reflective paint and equipped with a prototype infrared countermeasure exhaust system from 1 July through 14 October 1975. The testing was conducted at Edwards Air Force Base and at Point Mugu Naval Air Station, California. Results of these tests were compared with test results from earlier evaluations of the OH-58A performance and handling qualities characteristics and with preliminary base-line testing performed during this evaluation. One deficiency and two shortcomings were noted during this evaluation. Although not classified as a deficiency or shortcoming, the most significant finding in this evaluation was the serious degradation in hover and level flight performance when the rotor blades are painted with low reflective paint.
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 Government Reports Announcements Index written by and published by . This book was released on 1976 with total page 1220 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 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:
Download or read book Army Preliminary Evaluation Utility Tactical Transport Aircraft System UTTAS Sikorsky YUH 60A Helicopter Boeing YUH 61A Helicopter written by William R. Horton 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 Engineering Flight Test of the YCH 47B Helicopter Army Preliminary Evaluation I II and III written by Norman A. Mattmuller and published by . This book was released on 1969 with total page 166 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Army Preliminary Evaluation of the YCH-47B helicopter was conducted by the US Army Aviation Systems Test Activity at Philadelphia, Pennsylvania in three phases during the period 1 March 1967 to 31 August 1967. The improvements in hover and level flight performance were defined and the change in flying qualities from those of the CH-47A helicopter were evaluated. An objectionable level of noise and vibration was encountered during testing; however, a significant reduction in vibration was achieved by the reduction of recommended rotor rpm from 230 to 225. An expansion of the 16,000 pound external load flight envelope to that of the helicopter with internal loads was substantiated with the exception of bank angle limitations. As a result of stress checks performed in turn maneuvers, the bank angle envelope was reduced to avoid excessive fatigue damage on aft rotor head control components. (Author).
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 Engineering Flight Test of the YCH 47C Medium Transport Helicopter written by Jerry L. Jester and published by . This book was released on 1968 with total page 83 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:
