Droop

4000 600 0 Fig. 11.15 Effect of specific speed on pump performance curves. 1 Q Q* 2 0 1 Q Q* 2 0 1 Q Q* 2 A low-specific-speed pump (Ns 600) has a broad efficiency curve, a rising power curve, and a head curve which “droops’’ at shutoff, implying possible surge or hunting problems. Computational Fluid Dynamics The design of turbomachinery has traditionally been highly experimental, with simple theories, such as in Sec. 11.2, only able to predict…

its base. When its fronds (branches) Saguaro cacti among volcanic peaks in the Sonoran Desert of Arizona and Utah. (Reproduced by permission of Corbis. Photograph by David Muench.) U•X•L ENCYCLOPEDIA OF BIOMES [137] DESERT die, they droop down around the trunk and form a “skirt,” where animals like to live. The fan palm produces a datelike fruit, which is eaten by many desert inhabitants. A N N U A L S Long grasses, such as alpha or esparto grass, often flourish in the…

come and nestle there, as she had done, all unheeded, the day before, but never unheeded again. His heart throbbed loud and quick Strong man as he was, he trembled at the anticipation of what he had to say, and how it might be received. She might droop, and flush, and flutter to his arms, as to her natural home and resting-place. One moment, he glowed with impatience at the thought that she might do this, the next, he feared a passionate rejection, the very idea of which withered…

These trees will kill us if they can. She took off her helm and pushed back her sweat-soaked hair. “The sun will be up in a few hours. We’ll stop here and rest till break of day.” Stopping proved simple; rest came hard. No one slept, not even Droop-eye Dale, an oarsman who had been known to nap between strokes. Some of the men shared a skin of Galbart Glover’s apple wine, passing it from hand to hand. Those who had brought food shared it with those who had not. The riders fed and…