Environmental Engineering Reference
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side. The term “favourable” refers to a case where the resulting
pressure has a component, which causes the sail to rotate in the
right direction. The task was then to find the right shape and give it
the right bevel angle.
Figure 4.14
Two drawings showing the pressure of a flow from diferent
angles on a plane surface: (above) la Cour´s own description
from his research report; (below) the authors interpretation.
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