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Average wind velocity,| | | | | | | | | | | |
miles per hour | 4 | 5 | 6 | 7 | 8 | 9 | 10| 11| 12| 13| 14| 15
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Co-efficient | 16| 8 | 5 | 3 | 2 |1.4|1. |.85|.70|.60|.54|.50
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