Word: heat
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Dates: during 1950-1959
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...While passing through the flame, the air gets hotter, expands and rushes out of the furnace at high speed. A small amount of potassium chloride fed into it increases its ionization and makes it a better electrical conductor. Then the stream shoots into a hollow cone made of a heat-resisting, nonconducting material (see diagram). Electrical coils outside the cone create a strong magnetic field. As the gas speeds through, a powerful current of electricity flows across it and is collected by two electrodes inside the cone...
...Bill Gundy, off the first team. SI, on the other hand, took the easy way out of the halfback problem and named a twelve-man team, with Boulris, Crouthamel, and Fred Doelling at halfback, saying that the three were "inseparable." Boulris, Crouthemal, and Doelling might deny this with some heat...
Pyrographite is in limited production now, mostly for military purposes, but Raytheon sees many commercial possibilities, e.g., as lightweight insulation against extreme heat...
...angstroms*) as the distance between the atoms in the individual sheets (1.42 angstroms). In ordinary commercial graphite, microscopic crystals are jumbled almost at random, but in Pyrographite they are mostly aligned with their sheets parallel (see diagram). This builds up a layered structure that resists the motion of heat across the layers but permits easy passage along them...
Pyrographite can be deposited in sheets up to ½ in-thick, can be shaped to form rocket nozzles and caps for nose cones. Both these parts get punishing heat concentrated on rather small areas. The beauty of Pyrographite is that it conducts heat away from these danger points as fast as copper can, but it does not permit nearly as much heat to pass through it. A Pyrographite nose cone, for instance, spreads the heat of air friction over a large area and permits it to be radiated harmlessly away, but it does not let heat strike through the cone...