The Viper 640 is a high-performance one-design sport boat. At 21 feet long and only 735 lbs, it combines the stiffness of a keelboat with the acceleration and planning abilities of a dinghy.
The design mandate was “Simple, Clean and Effective”. The Viper has a precise and exhilarating feel on the helm, a spacious cockpit for 3 people, strict one-design class rules and ease of launching by ramp or hoist.
Check out Sail1Design’s One-Design Class Profile on the Viper 640!
Class website:
http://www.viper640.org/
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