Environmental Engineering Reference
In-Depth Information
Figure 4.15
Above: La Cour's drawing of the pressure resultant lying over
the axis from his research report. Below: The author's drawing
showing the pressure resultant lying to the favourable side of
the chord normal of a bent wing profile.
4.6
The “Ideal” Windmill
According to la Cour, the specifications of the ideal windmill are as
follows:
(1) The resistant surfaces in the four sails should be as few as
possible, especially near the tip of the sail.
(2) The width of the sail should be nearly 1/4 or 1/5 of the
length of the sail, and almost same all over.
Search WWH ::




Custom Search