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Castor
noun
A pivoting roller attached to the bottom of furniture to allow it to be moved.
Exact(57)
In a wet year, peanuts give the best returns, but if the rains are poor, the more drought-tolerant castor is a better bet.
Now, 15 federal ministries are pondering every conceivable consequence of paving the road, from greater prostitution to opportunities for organic derivatives of castor oil.
Why this should be so is usually explained by two things: the gyroscopic precession caused by the spinning front wheel, and the castor effect resulting from the front wheel's contact point with the road trailing behind the steering axis of the front forks—in much the same way that the trailing wheels of a shopping trolley allow it to be steered easily.
To understand what is really needed to make a bicycle self-stablising, a team headed by Jodi Kooijman of Delft University of Technology in the Netherlands, several years ago took a simplified version of the Whipple model and set both the gyroscopic terms and the trail to zero, thereby eliminating both gyro and castor.
One firm, for example, has devised a way to make glue using oil from locally-grown castor beans instead of petroleum-based chemicals.
Although their experiments showed that gyroscopic and castor effects were not necessary to make a bicycle stable, both seemed to help in some way to make it more ridable.
As he goes around kicking tyres, one thing your correspondent has noticed about battery-powered bikes is how many have more positive trail (ie, castor) than one would normally expect.
Most farmers in the region grow one crop of peanuts or castor per year.
Similar(3)
Derived from castor-bean plants, ricin is a powerful toxin.
A team led by Charles Davis at Harvard University examined eight genes of R. arnoldii and determined that the plant belongs to the Euphorbiaceae family, which includes poinsettias and bells of Ireland as well as commercially important crops such the rubber tree, castor-oil plant, and cassava.
It is an important market and processing centre for cotton, peanuts (groundnuts), sesame, corn (maize), coffee, tobacco, castor-oil seeds, tea, tropical fruits, and vegetables.
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