Environmental Engineering Reference
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wind pressure on diferent sail profiles. With his Kratostate he was
able to produce a constant airflow through the wind tunnels with
a deviation of only one per mille.
Figure 4.11
The wind tunnels (left); Drawing showing the Kratostate
(right).
Both wind tunnels were 2.2 m in length. The big tunnel was 1 m
in diameter, and the small one 0.5 m. The mill model for testing
was placed in front of the big wind tunnel with a friction dynamo-
meter. The pressure measure instrument was placed in front of
the small tunnel.
Figure 4.12
The pressure measurer (left); Table with Poul la Cour's
measurements with a bend profile (right).
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