Word: musts
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Dates: during 1950-1959
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...make solid rockets behave. One method, he said, is to put vanes in the gas jet. When their angles are changed, they deflect the stream of gas like a rudder. This system was used on the German wartime V2, but the vanes add a lot of drag, and they must be made of highly heat-resistant material if they are to last even the few minutes needed to do their...
...Pipe. Another system is to mount the nozzle at the end of a large, flexible coupling so it can switch from side to side like the combustion chamber of a liquid-fuel rocket. This is extremely difficult because the flexible pipe must carry the giant flow of hot, high-speed, high-pressure gas without leaking or burning out. But Ritchey implied that it can be done in an efficient way that causes little drag loss...
...guidance and control purposes, solid-fuel rockets are normally loaded with fuel to full capacity. Thus when one of them is fired at a target short of the maximum range, something must be done to cut off or slow the thrust when the rocket reaches the necessary speed. The flow of liquid fuels can be controlled by valves or pumps. Comparable control can be achieved with solids, said Ritchey, by opening small apertures upstream from the nozzle. The gas that leaks out through them reduces the pressure in the combustion chamber, and the thrust falls...
...great stage which faces the city. Another might have built a nice, safe building. I wanted something that would be contemporary for generations to come." Touring the building in a wheelchair to spare an ailing hip, Mies agrees: "Buildings last so much longer than any function, and you must design with that in mind. Good design does not grow...
...poetry reading is left mostly to poets -and there are not many poets around. Magazines devoted exclusively to verse are frail, poverty-stricken, ephemeral publishing ventures, subject to sudden collapse; Poetry, largest (5,500 subscribers) of about ten U.S. poetry magazines, must beg constantly to stay alive. In book circles, the sale of 5,000 copies of a volume of poetry is considered unusually brisk. Yet by last week An Introduction to Haiku, a book on one form of Japanese poetry released two months ago by Doubleday, had sold 9,500 copies and was still going strong...