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19 April, 12:47

At what rate should the blades of the offshore turbine rotate if the speed at the tip is to be the same as that of the turbine on land?

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  1. 19 April, 13:02
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    The question is incomplete it should be:

    Wind turbines designed for offshore installations are much larger than ones designed for use on land. One company makes a turbine for use on land with blades 39 m long that spin at 17 rpm, and a turbine for use offshore with blades that are twice as long.

    The answer is t o obtain the same tip speed, the RPM would need to be reduced to 1/2, or 8.5 RPM.
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