Split-tailed surfboard design, refined by Hawaiian surfer-boardmaker Ben Aipa in 1972. "With a swallowtail," TransWorld Surf magazine noted in 2003, "you have the width and volume for speed, while the split at the end means the wide planing surface will loosen up, making the board easier to turn." Prototypes for the double-pinned swallowtail were developed in the early and mid-'50s by California ...

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