Aerospace & Aviation

Generation of shock wave by flame in explosive gas during initial acceleration

Emissivity of luminous flames

Atomic and molecular line spectrum of organic- halide compounds and halides burning in alkali metal vapor

Power transistor cooling in space environment with heat sink radiation and conduction as mode of heat transfer

What does habitability mean? This word is commonly used and is bandied about as a thing which is necessary and desirable for all manned flight vehicles. But what does it really mean? A serious examination of the meaning of the term soon leads to attempts at definition into discussions of the interplay of such factors as the mission, the size and makeup of the crew, the jobs within the mission, the flight duration, the stress loads, the vehicle to be used, the comfort, and the deprivations inherent in the mission, the flight environment, et cetera. In other words, habitability might be considered the resultant of the interplay of all of the factors related to the man, his machine, his environment, and the mission to be accomplished. It is more easily visualized as the state of being at the completion of the interaction of all of the-factors rather than a discrete entity itself. Therefore, the provisions made to meet the habitability requirements can contribute to or be detrimental in meeting the program objectives. The requirement placed upon the space vehicle may be eased if necessary through the proper selection and training of the crewmen, The motivation of the crew may be an additional aid in providing a satisfactory solution to the habitability needs. The design and development of the space vehicle should avoid depending upon special selection and unusual training to meet the basic provisions needed to support the men in the space environment. The vehicle provisions should stand upon their own merit. Difficult and hazardous missions can he made more tolerable through augmentation of the provisions for habitability. For the sake of this discussion of habitability in a space station, this concept will be considered. This paper will emphasize a discussion of the interplay of some of these broader and little discussed factors as they reflect themselves in the development and operation of the space stations, rather than represent a list of items which have been established as essential for crew provisions. Ignoring these allied factors can lead to a successful mechanical system that will operate in space, yet a complete failure in providing the working, relaxing, and living areas so necessary for man if he is to maintain his productivity.

Pressure pulses, shock and vibratory loading on launch vehicle connectors - heat environment, vacuum and radiation effects on connector gaskets

Spectral emittance of electrode material for thermionic converter

Scanning mechanism for a satellite-borne x-ray spectrometer

Sampling studies downstream of hydrogen-nitrous oxide-diluent flames

A 90-degree flat-plate triode for direct energy conversion - thermionics

Tracking systems, mathematical models & errors

Determination of ionospheric electron density by analysis of faraday rotation records received from a transmitting satellite

Wing and fuselage concepts for supersonic aircraft

Waveguide windows made with polystyrene preformed plastic and sealed with foamed-in-place plastic are useful in any microwave waveguide system using cryogenic cooling.

Elimination of starting difficulties in SCR inverters is accomplished by the addition of two taps of the output winding of the inverter. On starting or under transient loads, the two additional taps deliver power through diodes without requiring quenching of SCR currents in excess of normal starting load.