Uh 60a Expanded Gross Weight And Center Of Gravity Evaluation PDF Download
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Total Pages | : 125 |
Release | : 1985 |
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Download UH-60A Expanded Gross Weight and Center of Gravity Evaluation Book in PDF, ePub and Kindle
Testing was conducted to obtain performance and handling qualities at the limits of the expanded gross weight and center of gravity (cg) envelope of the UH-60A helicopter. A total of 38.5 productive flight hours were flown at Edwards Air Force Base, California between 9 June and 22 November 1983. Equivalent flat plate area was minimum with the cg at a fuselage station (FS) of approximately 360 and increased at a more forward and aft cg tested (FS 347 and 366). One deficiency, three shortcomings, and three Prime Item Development Specification noncompliances were identified. One shortcoming, neutral stick- fixed static longitudinal stability in intermediate rated power climb, was associated with envelope expansion. The 4-per-rotor-revolution vibration characteristics, previously identified as a shortcoming, generally were unaffected by increasing gross weight but were aggravated by moving the longitudinal cg further aft. Except for the shortcoming pertaining to neutral static longitudinal stability, the handling qualities were essentially unchanged from those previously reported.
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Total Pages | : 614 |
Release | : 1987 |
Genre | : Military research |
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Download Descriptive Summaries for Program Elements of the Research, Development, Test and Evaluation, Army Program FY ... (U) Book in PDF, ePub and Kindle
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Total Pages | : 606 |
Release | : 1986 |
Genre | : Government publications |
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Download Descriptive Summaries for Program Elements of the Research, Development, Test and Evaluation, Army Program, FY 1987 (U), February 1986 Book in PDF, ePub and Kindle
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Total Pages | : 610 |
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Genre | : Military art and science |
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Download Department of the Army Pamphlet Book in PDF, ePub and Kindle
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Total Pages | : 614 |
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Genre | : United States |
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Download DA Pam Book in PDF, ePub and Kindle
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Total Pages | : 766 |
Release | : 1987-07 |
Genre | : Science |
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Download Technical Reports Awareness Circular : TRAC. Book in PDF, ePub and Kindle
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Total Pages | : 968 |
Release | : 1989 |
Genre | : Aeronautics |
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Download Scientific and Technical Aerospace Reports Book in PDF, ePub and Kindle
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Total Pages | : 1060 |
Release | : 1982 |
Genre | : Aeronautics |
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Download Army Aviation Digest Book in PDF, ePub and Kindle
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Total Pages | : 119 |
Release | : 1987 |
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Download Preliminary Airworthiness Evaluation of the UH-60A Equipped with the XM- 139 VOLCANO Mine Dispensing System Book in PDF, ePub and Kindle
Preliminary airworthiness flight tests were conducted at West Palm Beach, FL, (elevation 28 feet). Tests totaling 22.4 hours of productive flight time were conducted to determine handling qualities and performance of the UH- 60A in the VOLCANO system configuration at an average mission gross weight of 20,500 pounds and a longitudinal center of gravity at fuselage station 351.0 The handling qualities of the UH-60A with the VOLCANO system, installed were similar to the normal utility UH-60A. Three shortcomings were noted in this configuration: 1) the increased frequency and magnitude of 'tail shake' with the VOLCANO installed; 2) the position error for the ship's airspeed system was increased by approximately 8 knots at higher speeds (120 KCAS) due to the installation of the VOLCANO mine dispensing system; and 3) Stability Augmentation System (SAS) OFF dynamic response, not attributed to the VOLCANO installation, was aperiodic and divergent. The UH-60A helicopter with VOLCANO failed to meet two requirements of the Prime Item Development Specification; however, these noncompliances were not significant. Recommendations were made to incorporate data into the applicable portion of the VOLCANO operator's manual and to conduct additional testing. Keywords: Flight testing; Aerial mine dispensers; Helicopters.
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Total Pages | : 1774 |
Release | : 1993-04 |
Genre | : Science |
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Download Government Reports Announcements & Index Book in PDF, ePub and Kindle