Download or read book Evaluation of the OH 58A Helicopter with an Allison 250 C20 Engine written by Emmett J. Laing and published by . This book was released on 1972 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: The United States Army Aviation Systems Test Activity conducted a limited performance and handling qualities evaluation of the Bell Helicopter Company model OH-58A helicopter with an Allison 250-C20 engine installed. Twenty-five flights, 21.2 productive test hours, were required for the evaluation. Test results obtained with the Allison 250-C20 engine were compared with those previously obtained with the standard T63-A-700 engine. The primary performance improvement noted was an increase in out-of-ground-effect hover ceiling at a 3000-lb gross weight to 10,000 ft from 4600 ft. The long-range cruise airspeed was increased to 111 knots true airspeed from 104 knots true airspeed at a 5000-ft density altitude and a 3000-lb gross weight. The increased engine power did not significantly increase the service ceiling over the basic OH-58A at identical gross weights. One shortcoming, insufficient left directional control at 35 knots true airspeed in right sideward flight, was noted. Within the scope of the test, the performance of the OH-58A helicopter with the Allison 250-C20 engine was improved over the basic OH-58A helicopter. Handling qualities were essentially unchanged. (Author).
Download or read book Evaluation of an OH 58A Helicopter with an Allison 250 C20B Engine written by Tom P. Benson 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 Scientific and Technical Aerospace Reports written by and published by . This book was released on 1976 with total page 1072 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Instrument Flight Evaluation OH 58A Helicopter written by John R. Smith and published by . This book was released on 1972 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: The OH-58A light observation helicopter has a single main rotor and a two-bladed, semirigid, and teetering antitorque tail rotor. The tail rotor also has a delta-three hinge. The cockpit provides side-by-side seating for a crew of two (pilot and copilot/observer), and the cargo compartment has seats for two passengers. Dual flight controls are provided. The cyclic and collective controls are hydraulically boosted and irreversible, while the tail rotor control is unboosted. The landing gear consists of fixed, energy-absorbing skids. The helicopter is powered by an Allison T63-A-700 free gas turbine engine with a takeoff power rating of 317 shaft horsepower (shp) under sea-level, standard-day uninstalled conditions. The main transmission has a rating of 270 shp for continuous operation, with a takeoff power limit of 317 shp (5-minute rating). A list of the aircraft flight instruments and navigation equipment is shown.
Download or read book Operator s Manual written by and published by . This book was released on 1989 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handling Qualities Evaluation of the OH 58A Helicopter Incorporating the Model 570B Three axis Stability and Control Augumentation System written by Raymond B. Smith and published by . This book was released on 1973 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: A limited handling qualities evaluation of the OH-58A helicopter with a Bell Helicopter Model 570B three-axis stability and control augmentation system installed was conducted to determine its capability to perform instrument flight. Testing was performed by the US Army Aviation Systems Test Activity at Edwards Air Force Base, California. The testing consisted of 25 productive flight hours and was conducted from September through November 1972. The evaluation revealed significant improvements in the aircraft handling qualities with the addition of the augmentation system. The most significant enhancing characteristics provided by the equipment were: (1) increased damping of the lateral-directional oscillation (Dutch roll), (2) improvement of aircraft spiral stability from neutral to convergent, and (3) reduction in pilot effort required to maintain trim flight conditions. This evaluation was of limited scope, and primarily addressed handling qualities. It did not provide a basis to qualify the aircraft for instrument flight.
Download or read book Product Improvement Test of OH 58A Helicopter Cold Weather Test written by Jack D. Hill and published by . This book was released on 1970 with total page 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 1976 with total page 480 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 Engineering Evaluation JOH 58A Helicopter with an Automatic Relight System written by Tom P. Benson and published by . This book was released on 1975 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: The United States Army Aviation Engineering Flight Activity conducted a limited in-flight evaluation of an automatic engine relight system installed in an OH-58A helicopter at Edwards Air Force Base, California, from 12 February through 11 April 1975. During the program, 33 test flights were flown for a total of 13.5 productive flight hours. Results of the evaluation showed that established limitations may be exceeded if the automatic relight system functions at certain points within the current operating envelope. Required additional limitations to the current operating envelope with the automatic relight system activated include in-ground-effect, hover below 10 feet and specific combinations of airspeeds and engine power settings. Two deficiencies and one shortcoming were noted during the evaluation.
Download or read book Product improvement Test of OH 58A Helicopter Cold Weather Test written by Richard J. Followill and published by . This book was released on 1971 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book OH 58A Propulsion System Vibration Investigation written by James A. White and published by . This book was released on 1974 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents the results of an investigation of the OH-58A helicopter and Allison T-63 engine vibration characteristics. The investigation was directed toward the determination of engine response using impedance/mobility methods and NAsa Structural ANalysis (NASTRAN). The results of these studies are compared with each other, with results from independent vibration tests of the airframe and engine, and with engine vibration levels measured during flight testing of the OH-58A helicopter. The objective was to determine the parameters defining the vibratory interaction and to provide a common language for engine/airframe interface analysis and for preparation of engine/airframe specifications.
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 Government Reports Announcements Index written by and published by . This book was released on 1975 with total page 662 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Handling Qualities Evaluation OH 58A Helicopter Incorporating a Ministab 3 axis Stability Augmentation System written by Edward E. Bailes and published by . This book was released on 1975 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt: A limited handling qualities evaluation of the OH-58A helicopter incorporating the SFENA 3-axis stability augmentation system called Ministab was performed by the United States Army Aviation Engineering Flight Activity at Edwards Air Force Base, California. The system identified as the SFENA Ministab stability augmentation system was manufactured by the Societe Francaise d'Equipements pour la Navigation Aerienne (SFENA) of France and made available for test by Kaiser Aerospace and Electronics Corporation of Palo Alto, California, who also installed and maintained the system during testing. The testing consisted of 11.2 productive flight hours and was conducted from 20 July through 24 August 1974. This evaluation was of limited scope and consisted of both quantitative data and qualitative pilot comments. The test results show significant improvements in the aircraft handling qualities with the addition of Ministab.
Download or read book Flight Test Report of the Model OH 58A Helicopter with the 206 706 129 1 High Tubular Skid Gear Kit Installed written by Thomas L. Sanders and published by . This book was released on 1972 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report contains the results of a flight test evaluation conducted on the 206-706-129-1 high skid gear as installed on the model OH58A Helicopter. An L2700-206 HS ski kit, manufactured by Airglas Engineering Company was also installed on the high skid gear and evaluated. The limitations and hover performance of the basic OH-58A helicopter remained unchanged. (Author).
Download or read book Product Improvement Test Maintainability and Reliability Characteristics of the OH 58A Helicopter Between 1 200 and 2 400 Flight Hours written by ARMY AVIATION BOARD FORT RUCKER ALA. and published by . This book was released on 1972 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Evaluation of data obtained during this test revealed no significant difference in the maintainability and reliability of the OH-58A Helicopter during the 1,200- through 2,400-flight-hour period as compared with the 0- through 1,200-flight hour period. Copies of the complete data printouts are attached for each of the test helicopters.
Download or read book United States Army Combat Forces Journal written by and published by . This book was released on 1978 with total page 912 pages. Available in PDF, EPUB and Kindle. Book excerpt:
