Viper 640 Sailboats for Sale

Drawing Diagram

Builder drawing

Hull Type

Monohull · lifting

Rig

Fractional Sloop

LOA

21.08' · 6.43 m

Disp.

700 lbs · 318 kg

First year

1996

The Viper 640 represents a pivotal moment in the evolution of the modern sportboat, effectively bridging the gap between the visceral speed of a highperformance dinghy and the stability of a fixedkeel boat. Designed by Brian Bennett in 1996 and later revitalized through a partnership with Rondar Raceboats in 2005, the 21foot vessel was conceived to provide a highperformance racing experience that is both physically demanding and technically rewarding. Built using advanced composite construction, including a foamcored GRP hull and a carbon fiber mast, the Viper 640 is light enough to plane in moderate breezes yet remains manageable for a crew of three or four. Its design philosophy centers on simplicity, eliminating complex systems like backstays and runners in favor of a powerful, modern rig and a deep, lifting bulb keel. According to Sail Magazine, the boat’s resurgence under Rondar’s stewardship turned it into one of the most successful onedesign classes in North America and Europe, appealing to sailors who prioritize speedtocost ratios.