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:

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.

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:

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.

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:

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.

Download or read book DA Pam written by and published by . This book was released on with total page 614 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 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 Department of the Army Pamphlet written by and published by . This book was released on with total page 610 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Airworthiness and Flight Characteristics Test Part 2 YAH 64 Advanced Attack Helicopter written by Bartholomew D Picasso (III.) and published by . This book was released on 1981 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Airworthiness and Flight Characteristics Test Part 1 of the prototype YAH-64 helicopter (S/N 77-23258) was conducted at three test sites; Palomar Airport, Carlsbad, California (elevation 328 ft). Bishop Airport, Bishop, California (elevation 4120 ft), and Coyote Flats, California (elevation 9980 ft). Approximately 32 productive hours were flown during 45 flights between 30 May and 17 July 1981. Several design changes affecting performance and handling qualities were made to the YAH-64 since the last evaluation (EDT 4) the most significant of which were the changes in tail rotor rigging, the addition of a third DC electrical bus and the incorporation of a Nap-of-the-Earth/Approach mode of operation for the horizontal stabilator. Level flight performances and vibration levels have been slightly degraded since EDT 4, while handling qualities and out-of-ground-effect hover performance remain essentially the same. Numerous anomalies in the operation of the Digital Automatic Stabilization Equipment (DASE) were experienced which may render some of the handling qualities test results suspect. Two deficiencies (both DASE related) were found during this evaluation. Yaw SAS hardovers, and disengagement of the DASE with failure of the No. 2 generator. Nine previously unreported shortcomings (4 DASE related) were found. (Author).

Download or read book Test Report for the Flying Qualities Verification AH 64 Advanced Attack Helicopter written by Raymond W. Prouty and published by . This book was released on 1985 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development Test I Advanced Attack Helicopter Competitive Evaluation YAH 63 Helicopter YAH 64 Helicopter written by Warren E. Griffith 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 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:

Download or read book Internal Cockpit Reflections of External Point Light Sources for the Model YAH 64 Advanced Attack Helicopter written by Christopher C. Smyth and published by . This book was released on 1978 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: The US Army Human Engineering Laboratory (HEL) has developed a computer program for computing internal cockpit reflections on the transparent canopy surfaces of external point light sources. This work is part of a three-stage effort to determine optimum canopy designs for the Model 209 AH-1S Cobra Helicopter and the Model YAH-64 Advanced Attack Helicopter (AAH). The low glare canopy design presently used on both models consists of flat, transparent panels on the front surfaces and simple cylindrical panels on the sides and top. The design is a reasonable choice for reducing both solar glint to outside observers during daytime operations and internal reflections of outside light sources during nighttime operations. This work effort is directed toward a closer study of the two problems of glint and reflections, and developing an optimum design for the canopy's transparent surfaces.

Download or read book Development of the Empennage Configuration of the YAH 64 Advanced Attack Helicopter written by Raymond W. Prouty and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Airworthiness and Flight Characteristics A FC Test of YAH 64 Advanced Attack Helicopter Prototype Qualification Test Government PQT G Part 3 and Production Validation Test Government PVT G for Handbook Verification written by Bartholomew D Picasso (III.) and published by . This book was released on 1982 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Airworthiness and Flight Characteristics Test of the YAH-64 helicopter was conducted. Seventy flights and 70.4 productive hours were flown. Performance testing assessed the probability of meeting the production contract requirements and consisted of an evaluation of hover, takeoff, level flight, forward flight climb and autorotational descent performance. Handling qualities testing determined compliance with selected research and development contract requirements and included standard stability and control tests, an evaluation of slope landing characteristics and instrument flight capability. Additional tests included evaluation of an uprated engine and an external noise survey. The YAH- 64 now meets the performance requirements of the system specification for the production program; the vertical climb and maximum level flight cruise speeds. Slope landing characteristics were satisfactory up to 9 degree lateral slopes and 10 degree longitudinal slopes.