Word: oxygenate
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...into a fluid state by powerful refrigeration machines, it must be sealed in a double-walled vacuum container and kept constantly below its boiling point (-423° F.) to control vaporization. As a liquid, it is not readily flammable. It is when it vaporizes and comes in contact with oxygen that hydrogen becomes explosive. Which makes for a vicious problem: how to let off the inevitable vapors and avoid rupture of the tank as a result of the pressure of expanding gas, without running the risk of a fire outside the tank. Surprisingly, there have been few serious accidents...
...hydrogen is changed to its gaseous state, mixed with an oxydizing agent and ignited. Its explosive energy is greater per unit of weight than that of any other fuel now in use: one-third more thrust for each pound of liquid hydrogen than for the same weight of kerosene-oxygen fuels. "The difference in performance of liquid hydrogen over any other rocket fuel," says Norman C. Reuel of North American Aviation's Rocketdyne division, "represents the difference between man orbiting the earth and getting to the moon...
...McDivitt, he had a few flecks of caked blood in his nostrils. The medical men figured that this was caused by the dryness of his mucous membranes from inhaling pure oxygen for so long. Their solution for future space trips: a pinch of plain old petroleum jelly in the nostrils. X rays were taken of the astronauts' little fingers and heel bones both before and after the flight to see whether their long exposure to weight lessness and inactivity caused note worthy loss of calcium. The Soviet cosmonauts suffered such bone demineralization on their flights, and patients confined...
...Mickey Mouse. White also spent some twelve hours rehearsing with Y "handheld self-maneuvering unit"-the gadget that was to help him walk around in space. The device weighs 7½ lbs., has two small cylinders of compressed oxygen belted to a handle that also acts as a trigger to send jets of air through two hollow tubes, each 2 ft. long. Holding the contraption just below his midriff White could, in his weightless state, manipulate it so as to send him, like a bit of fluff in the wind, in any direction he desired...
During his 20 minutes outside the spacecraft, White took pictures, traded repartee with his partner and watched the earth slip by from Mexico to Bermuda. He used an oxygen-firing space gun to propel himself about...