Word: offs
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Dates: during 1950-1959
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¶ Food angina can be equally bad: some patients, accustomed to pain after eating, develop a conditioned reflex so that the mere sight of food produces an attack; some, from fear of the pain, starve themselves into another kind of illness. ¶ Physicians can induce angina if, instead of relieving...
Solid-fuel rockets are the dream weapons of military rocketeers. They have no pumps or valves to go wrong and are always ready to fire. Their big trouble is that they are harder to control than liquid-fuel rockets, whose small combustion chambers, fed by flexible pipes, can be mounted...
For 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...
Vacuum Extinguisher. If the power is to be cut off entirely, it can be done by extinguishing the rocket's fire. This is almost impossible at atmospheric pressure; if the flaming propellant is extinguished, it tends to relight. But in the vacuum of space all that is necessary is...
Another control problem is how to supply small bursts of power to alter the course of a rocket deep in space, to land it softly on the moon or swing it around Mars. Fuel systems now in use do not operate efficiently at low throttle, and once the fuel is...