| The Effect of Values on System Development Project Outcomes |
Mar-2009 |
231 pages |
| Authors:
Daniel B Ward; NATIONAL AERONAUTICS AND SPACE ADMIN LANGLEY RESEARCH CENTER HAMPTON VA
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 | To understand why organizations make certain decisions and target certain outcomes, it is useful to understand their priorities and preferences, commonly referred to as values. This research explores the relationship between the technical values held by system development teams and the operational effectiveness of the systems those teams produce. Specifically, it examines the impact of a value set called FIST (Fast, Inexpensive, Simple, Tiny) on Department of Defense (DoD) and ... |
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| National Aeronautics and Space Administration Langley Research Center's Design Criteria for Small Unmanned Aerial Vehicle Development |
01 NOV 2007 |
17 pages |
| Authors:
Thomas L. Jordan; Mark A. Hutchinson; Vernon E. Watkins; William M. Langford; Christopher M. Cagle; Michael J. Logan; NATIONAL AERONAUTICS AND SPACE ADMIN LANGLEY RESEARCH CENTER HAMPTON VA
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| National Aeronautics and Space Administration (NASA) Langley Research Center (LaRC) has a long, rich tradition of advanced aeronautics research using subscale aircraft. LaRC has developed detailed procedures and guidelines that set forth criteria for the design, analysis, quality assurance and documentation for wind-tunnel model systems to be tested at the LaRC. The criteria are intended to prevent model systems failure and/or facility damage. However, traditional wind tunnel experimental testing can ... |
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| Technical Findings, Lessons Learned, and Recommendations Resulting from the Helios Prototype Vehicle Mishap |
01 NOV 2007 |
19 pages |
| Authors:
Thomas E. Noll; Stephen D. Ishmael; Bart Henwood; Marla E. Perez-Davis; Geary C. Tiffany; John Madura; Matthew Gaier; John M. Brown; Ted Wierzbanowski; NATIONAL AERONAUTICS AND SPACE ADMIN LANGLEY RESEARCH CENTER HAMPTON VA
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| The Helios Prototype was originally planned to be two separate vehicles, but because of resource limitations only one vehicle was developed to demonstrate two missions. One configuration, designated HP01, was designed to operate at extremely high altitudes using batteries and high-efficiency solar cells spread across the upper surface of its 247-foot wingspan. The other configuration, designated HP03, was designed for long-duration flight. The plan was to use the solar cells ... |
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| Emerging and Future Technologies for Space Based Operations Support to NATO Military Operations (North Atlantic Treaty Organization Research and Technology Organisation Specialists' Meeting). Technical Evaluation Report |
01 DEC 2006 |
5 pages |
| Authors:
NATIONAL AERONAUTICS AND SPACE ADMIN LANGLEY RESEARCH CENTER HAMPTON VA
|
| All together 25 papers were presented at the seminar as oral speeches. Of these, three were keynote speeches. In addition, eight poster papers were displayed in the conference area. The presentations covered a relatively broad range of topics related to space exploitation and exploration. The basic message from most of the speakers was that the battle field will be served/supported by space based systems in a much higher degree than ... |
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| "Futures" of Space Technology "Frontiers of the Responsibly Imaginable" |
SEP 2006 |
49 pages |
| Authors:
Dennis M. Bushnell; NATIONAL AERONAUTICS AND SPACE ADMIN LANGLEY RESEARCH CENTER HAMPTON VA
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| This briefing gives an overview of space technology issues and the metrics by which they are measured. |
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| The HART-II Test: Rotor Wakes and Aeroacoustics with Higher-Harmonic Pitch Control (HHC) Inputs - The Joint German/French/Dutch/US Project |
JUN 2002 |
13 pages |
| Authors:
Yung H. Yu; Chee Tung; Berend van der Wall; Heinz-Juergen Pausder; Casey Burley; Thomas Brooks; Philippe Beaumier; Yves Delrieux; Edzard Mercker; Kurt Pengel; NATIONAL AERONAUTICS AND SPACE ADMIN LANGLEY RESEARCH CENTER HAMPTON VA
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| In a major cooperative program within the existing US-German and US-French Memoranda of Understanding/Agreements (MOU/MOA), researchers from German DLR, French ONERA, NASA Langley, and the US Army Aeroflightdynamics Directorate (AFDD) conducted a comprehensive experimental program in October 2001 with a 40%-geometrically and aeroelastically scaled model of a BO-105 main rotor in the open-jet anechoic test section of the German-Dutch Windtunnel (DNW). This international cooperative program carries the acronym HART-II (Higher ... |
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| THE ACCURACY OF THE SUBSTITUTE-STRINGER APPROACH FOR DETERMINING THE BENDING FREQUENCIES OF MULTISTRINGER BOX BEAMS |
Apr-1956 |
34 pages |
| Authors:
William W Davenport; NATIONAL AERONAUTICS AND SPACE ADMIN LANGLEY RESEARCH CENTER HAMPTON VA
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| The accuracy of the substitute-stringer approach for including the effects of shear lag in the calculation of the transverse modes and frequencies of multistringer box beams is investigated. Box beam, the covers of which consist of normal-stress-carrying stringers on sheets which carry not only shear but also normal stress, are analyzed exactly. Frequencies of beams with various numbers of stringers, obtained by means of this exact analysis, serve to determine ... |
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| A SUMMARY OF DATA ON THE DIVISION OF LOADS FOR VARIOUS WING-FUSELAGE COMBINATIONS |
08-Jun-1953 |
17 pages |
| Authors:
CLARENCE L GILLIS; NATIONAL AERONAUTICS AND SPACE ADMIN LANGLEY RESEARCH CENTER HAMPTON VA
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| A summary has been made of the available experimental data on division of normal-force loads between the wing and fuselage of aircraft. Comparison of the experimental values with theoretical calculations which include interference effects show good agreement in general with the greatest differences occurring near a Mach number of 1.0. At high angles of attack, above the range of linear lift curves, the proportion of the total wing-fuselage load carried ... |
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| STRENGTH ANALYSIS OF STIFFENED THICK BEAM WEBS WITH RATIOS OF WEB DEPTH TO WEB THICKNESS OF APPROXIMATELY 60 |
May-1953 |
17 pages |
| Authors:
L R LEVIN; NATIONAL AERONAUTICS AND SPACE ADMIN LANGLEY RESEARCH CENTER HAMPTON VA
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