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Why is the Challenge Double Header Wind Engine unique?

April 26, 2017challenge double engine header wind

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Why is the Challenge Double Header Wind Engine unique?

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The Challenge Double Header Wind Engine is the last surviving wind engine of its kind that we know of. Its unusual “double header” design means that it has two 30-foot wind wheels which rotate in opposite directions. In addition, two smaller side wheels rotate and cause the wind engine to face the direction of the wind.