From RC Helicopter Wiki
A type of linkage that changes motion around a 90 degree angle. The name comes from its first use, changing the vertical pull on a rope to a horizontal pull on the striker of a bell, used for calling servants in upper class British households.
|This page uses content from Wikipedia. The original article was at Bell crank. The list of authors can be seen in the page history. The text of Wikipedia is available under the GNU Free Documentation License.|
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