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Engineer Design Test 1 Hughes Yah 64 Advanced Attack Helicopter
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Book Synopsis Engineer Design Test 1: Hughes YAH-64 Advanced Attack Helicopter by : Richard C. Tarr
Download or read book Engineer Design Test 1: Hughes YAH-64 Advanced Attack Helicopter written by Richard C. Tarr and published by . This book was released on 1978 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Handling Qualities Evaluation, Engineer Design Test 1, was conducted of the Hughes Helicopter Company YAH-64 advanced attack helicopter from 22 April 1978 through 1 May 1978 at Palomar Airport, Carlsbad, CA (elevation 320 feet). A total of 15 flights were conducted during 21.8 hours (17.4 hours productive). The objectives of the test were to reevaluate certain flight characteristics which were undesirable during Phase 1 testing, and to assess the effect of design changes on aircraft handling qualities. This phase of the aircraft development was not intended to address all of the undesirable flight characteristics uncovered during the Phase 1 testing. Many enhancing characteristics, deficiencies, and shortcomings, reported during the government competitive test (GCT) remain valid. The YAH-64 continues to have the potential to be developed into an excellent attack helicopter.
Book Synopsis Engineer Design Test 2 Hughes YAH-64 Advanced Attack Helicopter by : Vernon L. Diekmann
Download or read book Engineer Design Test 2 Hughes YAH-64 Advanced Attack Helicopter written by Vernon L. Diekmann and published by . This book was released on 1979 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: In general, the performance of the helicopter in terms of power required has deteriorated from DT 1, although there is a slight performance improvement in level flight between approximately 50 and 90 knots true airspeed (KTAS). Tail rotor performance has markedly deteriorated from DT 1. The starting procedure utilized on the YAH-64 helicopter is an enhancing characteristic and should be incorporated in future Army aircraft where possible. There were seven deficiencies (2 previously defined) and 43 shortcomings identified (16 previously defined). The deficiencies include: the possibility of dual-engine fuel starvation with useable fuel remaining; the restricted forward field of view during the landing flare; the inability to control heading with Automatic Stabilization Equipment disengaged at the critical azimuth between 25 to 40 KTAS; insufficient left directional control margin in right sideward accelerations; the lack of adequate cues to warn the pilot of a partial power engine malfunction; low activation threshold of the Low Main Rotor RPM warning; excessive 4/rev lateral vibration (pilot seat) during the termination of the approach and in level flight at airspeeds less than 50 and greater than 130 knots calibrated airspeed (KTAS). Canopy drumming characteristics had improved from Engineer Design Test 1 (EDT 1) but remain a shortcoming.
Book Synopsis Engineer Design Test 2 Hughes YAH-64 Advanced Attack Helicopter by : Vernon L. Diekmann
Download or read book Engineer Design Test 2 Hughes YAH-64 Advanced Attack Helicopter written by Vernon L. Diekmann and published by . This book was released on 1979 with total page 386 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Engineering Design Test 4 YAH-64 Advanced Attack Helicopter by : Gary L. Bender
Download or read book Engineering Design Test 4 YAH-64 Advanced Attack Helicopter written by Gary L. Bender and published by . This book was released on 1980 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: Engineer Design Test 4 (EDT-4) was conducted using a prototype YAH-64 aircraft. This test was conducted at Palomar Airport, Carlsbad, California, (elevation 328 feet) between 10 and 29 November 1980. Approximately 33 hours were flown during 27 flights. Major changes affecting performance and handling qualities were made to the YAH-64 since the last evaluation (EDT-2). These included a new, digital stability augmentation system, and a redesigned empennage featuring an automatically programmed stabilator and an increased diameter tail rotor. In previous evaluations the flight envelope and scope of test were limited by structural loads and continuous monitoring of those loads was required for all flights. During this test, the flight envelope was much larger and no structural limits were encountered. Hover and level flight performance of the aircraft have been improved since EDT-2. Handling qualities have been greatly improved. The most significant areas of handling qualities improvements were in low-speed flight characteristics, including directional control margins, short-period dynamic stability characteristics (particularly in high speed flight), and in aircraft pitch attitude during approaches and IRP climbs. Three deficiencies were found during this evaluation. The disengagement of the HARS, DASE, and automatic operation of the stabilator, and erroneous activation of the engine out/low rotor speed audio warning tone with failure of the No. 1 generator random failure of the master caution light to illuminate with the illumination of some caution on warning panel segment lights; and the restricted pilot's field of view caused by canopy frame structure during NOE and contour flight.
Book Synopsis Engineer Design Test 2 (EDT 2) YAH-64 Advanced Attack Helicopter (AAH) by : Richard C. Tarr
Download or read book Engineer Design Test 2 (EDT 2) YAH-64 Advanced Attack Helicopter (AAH) written by Richard C. Tarr and published by . This book was released on 1979 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Engineering Design Test 4 YAH-64 Advanced Attack Helicopter by : Gary L. Bender
Download or read book Engineering Design Test 4 YAH-64 Advanced Attack Helicopter written by Gary L. Bender and published by . This book was released on 1980 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development Test 1 Advanced Attack Helicopter Competitive Evaluation Hughes YAH-64 Helicopter by : Robert L. Stewart
Download or read book Development Test 1 Advanced Attack Helicopter Competitive Evaluation Hughes YAH-64 Helicopter written by Robert L. Stewart and published by . This book was released on 1976 with total page 389 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Scientific and Technical Aerospace Reports by :
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