A Scow

The A Scow is an American scow-hulled sailing dinghy that was designed by John O. Johnson as a racer and first built in 1901.

[2] The design was initially built by Johnson Boat Works in White Bear Lake, Minnesota United States, but that company closed in 1998 and production passed to Melges Performance Sailboats, who continue to build it.

[1] For sailing the design is equipped with an asymmetrical spinnaker of 1,200 sq ft (110 m2), flown from a retractable bowsprit.

[1] A film was made about racing A Scows, The Ultimate Ride, by racer Peter Crawford.

But a subtle tug on the tiller, a slight ease of the main and spinnaker sheets, and zingo, you're sailing at 25 knots.