CLASS HISTORY
The Viper 640 is the fast and fun one-design that almost didn't make it. Shortly after being named the 1997 Boat the the Year, the Viper lost its builder and went out of production. The design was so well loved that in 2005, a small group reestablished the class, recruited a new builder, and started a grassroots fleet. 20 hulls quickly grew to over 125. A keelboat in name only, the swift and highly responsive Viper 640 is a great fit for sailors looking for a modern, moderately athletic, and high-performance sportboat.
Boat Specifications
Length Overall: 21ft 4 in (6.40 m)
Length Waterline: 19 ft 1 in (5.7 m)
Beam: 8 ft (2.4 m)
Displacement:749 lb (340 kg)
Ballast: Lifting Bulb Keel:
271 lb (123 kg)
Sail Area: Main/Jib:
252 sq. ft (23.4 sq. m)
Sail Area:
Spinnaker:425 sq. ft (39.4 sq. m) Designer: Brian Bennett, Kiwi Yacht Design Builder: Rondar Boats
