NASA - National Aeronautics and Space Administration (NASA): Recent submissions
Now showing items 101-120 of 3613
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NASA-LLIS-1448
Abstract: Abstract:
Different software tools with differing access protocols caused inefficiencies. Electronic investigation tools should have secure, automated, user-friendly access.Subject(s) : Accident Investigation , Administration/Organization , Computers , Configuration Management , Information Technology/Systems , NASA Standards , Policy & Planning , Safety & Mission Assurance , Security , -
NASA-LLIS-0886
Abstract: Abstract:
Although a mission assurance manager was assigned to MCO during project development, there was no independent mission assurance function established for the work performed at JPL following ...Subject(s) : Documentation , Failure Reporting and Corrective Action System , Flight Operations , FRACAS , Management Oversight , Policy & Planning , Product Assurance , Risk Management/Assessment , Safety & Mission Assurance , Software , Software Quality Assurance , Software Test , Spacecraft , SQA , Test & Verification , -
NACA-TN-2502
Abstract: Force, moment, pressure-distribution, and boundary-layer measurements are presented for a series of five airfoil sections. The stalling characteristics of these airfoil sections at low speeds are of three types:
1. ...Subject(s) : BOUNDARY , DESIGNATED , LAYER , PROFILES , SECTION , SECTIONS , STALLING , VARIABLES , WING , -
NASA-CR-413
Abstract: Linear aerodynamic loads for cone-cylinder configurations in trisonic rangeSubject(s) : AERODYNAMIC , CONE , CONES , CYLINDER , CYLINDERS , DISTRIBUTION , FORCES , LOAD , LOADS , SPEED , SUBSONIC , TRISONIC , TUNNELS , WIND , -
NACA-RM-A52L04 REV A
Abstract: INTRODUCTION
In the classical study of the longitudinal motion of an aircraft, it is usually found that the motion resulting from a small equilibrium destroying disturbance consist of two modes: one, a lightly damped, ... -
NACA-TR-971
Abstract: The stability derivatives valid for a limited range of supersonic speeds are presented for a series of sweptback wings tapered to a point with sweptback or sweptforward trailing edges. These wings were derived by ...Subject(s) : AERODYNAMIC , AIRCRAFT , COMPUTATIONAL , DELTA , DISTRIBUTION , DYNAMICS , EDGES , EFFECT , FLOW , FLUID , LOADING , PARTS , PRESSURE , STABILITY , SUPERSONIC , SWEEP , SWEPT , THIN , TRAILING , WING , WINGS , -
NASA-LLIS-0178
Abstract: Description of Driving Event:
During processing, employees failed to perform checks of the mandatory inspection points of the orings as specified in the acceptance criteria. However, a review of ...Subject(s) : Risk Management/Assessment , Test & Verification , -
NACA-TN-167
Abstract: In the first series of wind tunnel tests, the drag and cross wing force of all the struts were measured at a wind speed of 30 mph and at angles of yaw from 0 degrees to 20 degrees. To determine the magnitude of the VL ...Subject(s) : METAL , PROPELLERS , -
NASA-LLIS-5061
Abstract: One of the major goals of the Constellation Program was to reduce life-cycle costs and the logistics footprint. A comprehensive set of supportability requirements was needed at the Program level to minimize the logistics ... -
NASA-LLIS-1199
Abstract: Description of Driving Event:
On October 3, 1990, at approximately 0940 hours at the Vertical Assembly Building Transfer Aisle, the OV-104 Orbiter was being rotated toward the vertical position when ...Subject(s) : Configuration Management , Facilities , Flight Equipment , Flight Operations , Ground Equipment , Ground Operations , Hardware , Human Factors , Launch Process , Logistics , Mishap Reporting , Parts Materials & Processes , -
NASA-LLIS-0821
Abstract: Practice:
This practice provides proven techniques for enhancing the reliability of Automatic Transfer Switches (ATS) used in critical applications. Systems which require the use of ATS may be optimized ... -
NACA-TN-1705
Abstract: INTRODUCTION
In structural members, discontinuities such as holes produce stress concentrate ions but the effects of plastic flow on such stress concentrations, especially under repeated loads, are not generally known. ...Subject(s) : ALUMINUM ALLOYS , SHEET - ALCOA 24ST , EFFECT OF HOLES , LOADS - PLATES , FLAT , PLATES - PLASTICITY , PLATES - TENSION , PLATES , FLAT - STRESSES , STRESS DISTRIBUTION - HOLES , -
NASA-LLIS-0031
Abstract: Description of Driving Event:
Post launch checkout and semi-annual GOX vent arm maintenance requires technicians to service the GOX vent arm upper hinge and associated flexhoses. The GOX vent arm upper ...Subject(s) : Facilities , Ground Equipment , Ground Operations , Hardware , Human Factors , Industrial Operations , Personal Protective Equipment , Safety & Mission Assurance , -
NASA-LLIS-0963
Abstract: Description of Driving Event:
Computer mathematical models had shown the engine to be sensitive to small changes in propellant conditions, and that timing relative to opening the propellant valves was ...Subject(s) : Configuration Management , Cryogenic Systems , Ground Equipment , Hardware , Launch Vehicle , Parts Materials & Processes , Safety & Mission Assurance , Spacecraft , Test Article , Test Facility , -
NASA-LLIS-0619
Abstract: Description of Driving Event:
The primary objective of the Advanced Composition Explorer (ACE) Project was to determine and compare the elemental and isotopic composition of several distinct samples ...Subject(s) : Administration/Organization , Policy & Planning , Test & Verification , -
NASA-LLIS-1421
Abstract: Abstract:
The training and development of new or inexperienced Project Managers (PM) can be greatly enhanced by pairing them with a Deputy Project Manager (DPM) that is experienced in at least one ...Subject(s) : management best-practices , management team , personnel assignments , Program and Project Management , Training and development , -
NASA-TM-78533
Abstract: Wind-tunnel tests were conducted to investigate the side forces and yawing moments that can occur at high angles of attack and zero sideslip for cylindrical bodies of revolution. Two bodies having several tangent ogive ...Subject(s) : AERODYNAMIC , AFTERBODIES , ANGLE , ATTACK , BODIES , CHARACTERISTICS , CYLINDERS , FINENESS , FOREBODIES , MACH , NOSES , NUMBER , RATIO , REVOLUTION , REYNOLDS , ROTATING , TESTS , TUNNEL , WIND , -
NASA-LLIS-3116
Abstract: Abstract:
The Space Shuttle Orbital Maneuvering System (OMS) pod rotator (a 5-ton jack screw) was bent on three occasions because of overloading. As a result, Boeing designed a system consisting of two ...Subject(s) : Ground Equipment , Hardware , Lifting Devices , Simulators and Training Systems , Systems analysis - cost analysis , Vehicle concepts , -
NASA-TN-D-7815
Abstract: The characteristics, which include the cornering-force and drag-force friction coefficients and self-alining torque, were obtained on dry, damp, and flooded runway surfaces over a range of yaw angles from 0 deg to 12 deg ...Subject(s) : AERODYNAMIC COEFFICIENTS , AIRCRAFT TIRES , FRICTION DRAG , HYDROPLANING , RUNWAY CONDITIONS , SELF ALIGNMENT , TORQUE , TRACTION , TREADS , -
NASA-STD-8709.20
Abstract: PURPOSE
This NASA-Standard (NASA-STD) defines the process requirements for managing the application of NASA's SMA requirements, under the SMA TA. This is a broad-scope document with six main objectives: ...