Add Yahoo as a preferred source to see more of our stories on Google. The Propel Foil in its classic (and fastest) mode. (photo/Propel Foil) Like most activities that require a delicate balancing act, ...
DETROIT – On a calm, rippling Detroit River, three swimmers tow a trio of boards equipped with long masts and carbon fiber wings toward a clear patch of water. They flip the boards, climb on top, ...