Aerospace & Aviation

Estimation of space radiation exposure during lunar mission - spacecraft shielding

Radiation dose from primary cosmic rays compared to dose from gamma rays produced by proton-proton reactions in solar flare - spacecraft shield

Transport calculations for proton shielding

Biological effect of solar flare radiation - lethal dose in rats

Biological effect of high energy proton radiation, radiation hazard

Hazardous late effects of radiation exposure in man

Correlation of solar flares in time with indices of activity of solar regions - prediction of solar proton events

Energy spectra, intensity and radiation of cosmic rays from solar proton events

Composition of solar cosmic rays - radiation hazard

Charged particle measurement in venus magnetosphere with geiger-mueller detector on mariner ii

Map of lunar limb areas - part iii

Wing and flap loads of v/stol aircraft - wind tunnel study

This final report describes the work that was done to determine the state-of-the-art of valves required for space exploration vehicles and the steps that were taken to advance the technology. Interviews were held with personnel of major prime manufacturers to determine current problems and current and future requirements. Manufacturers were surveyed by mail to determine what equipment is presently being produced. An extensive search of patent office files was made to determine if any novel valve concepts not already applied to aerospace valves might exist. A literature search was conducted to provide the necessary technical information that was required for the program. Several extensive studies were made to determine the effects on materials resulting from use in space applications, and an investigation of the basic phenomena of valve seat wear was initiated. With the information developed in the surveys and studies, the significant problems associated with valves were identified and are described under "Discussion of Problems. " A novel valve concept was developed and a prototype valve was built and successfully tested. A seal compound of Teflon and stainless steel was developed which possesses superior cold flow characteristics while retaining the desirable properties of the basic Teflon material.

Satellite instrumentation tested aboard a sounding rocket - atmospheric drag tests

Materials science - metallurgy, chemical engineering, ceramics