Search Results

The onboard “SODART” telescope silicon detector cooling system of the “Spectrum-X-Gamma” observatory, which is designed for the space objects X-ray radiation study, is described. The scale-down model of the passive cooling system description and thermal vacuum test results of this model are given. In the real cooling system the minimal detector temperature at 300 mW heat release is expected about 107 K.

The sweetpotato (Ipomoea batatas L. LAM.) is a versatile and underexploited food crop. Consumption of sweetpotato based processed foods provide β-carotene, which is the major precursor of vitamin A. The sweetpotato has the potential to provide antioxidants that may help reduce the radiation risks astronauts face while in space. Therefore the objective of this experiment was to evaluate β-carotene in dehydrated hydroponic sweetpotato cultivars. Hydroponic cultivars WHATLEY/LORETAN and NCC-58 were grown with and without 7-10 μmole of light. WHATLEY/LORETAN contained the highest amount of β-carotene content average of 31 μg/100g in dehydrated hydroponic sweetpotatoes compared to NCC-58 with 18.5 μg/100g.

RADIATION can produce almost instantaneous failure of modern aircraft lubricants, tests at Southwest Research Institute show. Two types of failures demonstrated are rapid viscosity rise and loss of heat conductivity. Furthermore, it was found that lubricants can become excessively corrosive under high-level radiation. Generally speaking, the better lubricants appeared to improve in performance while marginal ones deteriorated to a greater extent under radiation. When the better lubricants were subjected to static irradiation prior to the deposition test, there was a minor increase in deposition number as the total dose was increased.

This specification covers the requirements for producing a zinc phosphate coating on ferrous alloys and the properties of the coating.

The first element of the International Space Station (ISS), Zarya, was funded by NASA and built by the Russian aerospace company Khrunichev State Research and Production Space Center (KhSC). NASA Glenn Research Center (GRC) and KhSC collaborated in performing analytical predictions of the on-orbit electrical performance of Zarya’s solar arrays. GRC assessed the pointing characteristics of and shadow patterns on Zarya’s solar arrays to determine the average solar energy incident on the arrays. KhSC used the incident energy results to determine Zarya’s electrical power generation capability and orbit-average power balance. The power balance analysis was performed over a range of solar beta angles and vehicle operational conditions. This analysis enabled identification of problems that could impact the power balance for specific flights during ISS assembly and was also used as the primary means of verifying that Zarya complied with electrical power requirements.

This specification covers one type of organic fiber in the form of yarn. The product shall be formed as a multiplicity of filaments drawn together and gathered into an approximately parallel arrangement.

This specification covers one type of organic fiber in the form of yarn. The product shall be formed as a multiplicity of filaments drawn together and gathered into an approximately parallel arrangement.

This specification covers one type of organic fiber in the form of yarn. The product shall be formed as a multiplicity of filaments drawn together and gathered into an approximately parallel arrangement.

This specification covers one type of organic fiber in the form of yarn. The product shall be formed as a multiplicity of filaments drawn together and gathered into an approximately parallel arrangement.

MBB and Rockwell, under DARPA/NAVAIR and GMOD contract, are currently designing an experimental aircraft which will be dedicated to demonstrate “enhanced fighter maneuverability” (EFM) and supermaneuverability in particular. The aircraft is designed to break one of the last barriers left in aviation, the stall barrier. It will be able to perform tactical maneuvers up to 70° angle of attack and thus achieve very small radii of turn. Such highly instantaneous 3-dimensional maneuvers are of significant tactical value in future air combat with all aspect weapons. Key to the penetration into this unexplored flight regime is thrust vectoring in pitch and yaw. This feature is also used to enhance agility in critical flight conditions and to enhance the decoupling of fuselage aiming and flight path control as required for head-on gun firing.

The auxiliary power system of the X-15 airplane represents a uniqueness in its application. It must operate continuously in flight, in a space environment, during zero gravity, during reentry heating, and for a period of time which often exceeds the X-15 rocket engine operation by 1400 sec. The X-15 auxiliary power system must provide both hydraulic and closely regulated 400-cycle electrical power for operation of various X-15 systems. This paper describes the system, its functions, and its major components. A brief introduction to an X-15 research mission is included to illustrate the integration requirements of the auxiliary power system to the X-15 and the research system.

This specification establishes process controls for the repeatable production of preforms by Wire Fed Plasma Arc Directed Energy Deposition (PA-DED). It is intended to be used for aerospace parts manufactured using Additive Manufacturing (AM) metal alloys, but usage is not limited to such applications.

This specification establishes process controls for the repeatable production of preforms using the wire fed laser directed energy deposition (L-DED-wire) process for additive manufacturing. Preforms are intended to be used to manufacture aerospace parts, but usage is not limited to such applications.

This specification covers a loosely-woven cotton in the form of wipes supplied in rolls or cut sheets.

The ability to accurately and reliably annunciate the presence of aircraft wing contaminants greatly reduces the hazards of aircraft operation in winter precipitation environments. A new wing contamination detection system was designed to detect contaminants on the surface of an aircraft wing. Testing on a Fokker F100 aircraft was completed during the 1992-1993 winter icing season. The testing revealed that the system was able to detect ice, frost, hoar frost, and deicing fluid mixtures on the wing. The system performance was evaluated against Fokker's current requirements for an operational system.

A study was made to determine the effectiveness of low power wind energy harvesting for mobile applications. Experimental and simulated data has shown that harvesting of alternative energy resources is viable for potential mobile applications. This conducted study incorporated a mobile configuration consisting of a wind-photovoltaic hybrid in concert with a vehicle generator. The study has demonstrated an improvement in overall efficiency of the power generation system.

This technical paper and presentation addresses the need for more refined, pervasive and highly engaged technical leadership in the system safety discipline. Systems engineering disciplines have been led to believe that by following a single industry standard, generic plans, inflexible processes, proven methods and techniques a system with low safety risk will evolve with little rework. The truth is there is no prescriptive one size fits all approach, or a convention that will anticipate and cover all needs. In several domain areas, especially modern military and commercial airborne systems, diverse technology and functionality have been evolving with such high complexity and criticality that collective processes will not work unless seasoned leaders allow creativity and innovation to be part of the safety culture. Leaders must have intuitive engineering and operations judgment to determine how to best allocate effective resources to meet system safety goals and objectives.

This document recommends supplementary design criteria to enhance endurance and reliability of transport aircraft wheels and brakes.

This document recommends supplementary design criteria to enhance endurance and reliability of transport aircraft wheels and brakes.

This specification defines the requirements for joining metals and alloys using the gas-tungsten-arc welding (GTAW) methods.