Word: diagraming
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Dates: during 1950-1959
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Instead of cylinders and pistons, the Wankel engine has a single combustion chamber shaped like a fat-waisted figure eight (see diagram). Inside, it is a three-cornered rotor with curved sides. A shaft passes through the rotor and makes it move on an eccentric orbit by means of two gears. All three corners of the triangle stay in contact with the wall of the chamber at all times. To make the contacts gaslight, each corner is tipped with an inset metal strip that, as the drive shaft revolves, is pushed tight against the cavity's inner walls...
...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...
...steel spring is a single-strand steel wire for stiffening. As in the Syracuse housewife's case, polyethylene tubing is slipped over the steel spring. But in her case, the doctors did not go beyond the aorta. Now they go around the aorta's arch (see diagram) to its end at the aortic valve-the blood's exit from the left ventricle...
...between the atoms in adjoining layers is more than twice as great (3.35 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...
When they reach the hardware stage, Acoustica's engineers will build an experimental rocket engine with a cylindrical cavity running through the mass of fuel (see diagram). A "grain"' of this shape is simple and strong, but if left alone it burns at an uneven rate: as the fuel is consumed, the cavity gets bigger and exposes more surface to the heat. Since the amount of hot gas generated is proportional to the area of burning fuel, the gas pressure keeps rising until just before burnout. The effect is that solid-fuel rockets of this type must have...