When Corsair Marine introduced the F-27 folding trimaran in 1985, it quickly became the dominant builder of practical, trailerable, cruiser/racer trimarans in the United States. Several hundred were sold, encouraging the company to introduce the F-24 Mark 1, a smaller version, in 1992. The sailing performance of the F-24 was considerably less than the F-27, which disappointed the racing crowd. Corsair responded by updating the F-24 with a rotating mast, daggerboard, reduced accommodations, and a lighter weight, but it was still no barnburner. So, when we sailed the new Sprint 750, which is essentially an upgrade of the F-24, I was unprepared for its stunning performance.