Welcome to the Viper 640 Class

The Viper 640 is a high-performance one-design sport boat.
At 21 feet long and only 748 lbs, it combines the stiffness of a keelboat with the acceleration and planing 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.


Want to test drive a Viper 640? Find and contact one of our builder's reps to go for a ride near you.  Life is too short to sail slow boats!
Viper 640 fun at the Newport Regatta

EFG Bank Pan American Championship

Click here for all the information about the 2014 EFG Bank Viper 640 Pan American Championship, presented by Rondar Raceboats.

How to Buy a Viper

Buying a Viper 640 is easy! Our sole Class approved builder, Rondar Raceboats, has reps covering all of North America. They're all enthusiastic Viper owners who are here to help introduce you to the Viper with a demo sail and guide you through the process of buying your own Viper 640. CLICK HERE to locate and contact the rep nearest you!

Upcoming Major Events

Pacific Coast Championship / LBRW
Long Beach, CA
June 27-29

New England Championship / Marblehead NOOD
Corinthian YC
July 25-27

Brad Boston Wins Viper 640 2014 North American Championship
Written by Buttons Padin, V640 Class Administrator   
Sunday, 07 September 2014 18:37

Brad Boston (Sarnia, Ont.), sailing with Curtis Florence (Cleveland, OH) and Chad Corning (New Rochelle, NY) sat in third place after 11 races over three days of sailing from Alamitos Bay Yacht Club. That trio executed a classic come-from-behind finish on the fourth and final day to claim the 2014 Viper 640 North American Championship. Boston presided over a sailmakers’ boat handling seminar Friday night and was overheard commenting how it was unusual for him to be only four points off the lead without having won any of the 11 races sailed over the first three days. That quickly changed as the fleet of 35 Viper 640s headed out through the breakwater for the final day of racing.

No Pain, No Gain on Day 3 of Viper North Americans
Written by Buttons Padin, Class Administrator   
Friday, 05 September 2014 19:58

A solid sea breeze and short chop made the third day of the 2014 Viper North Americans one for the record books.  Epic conditions prevailed for the third day in a row, with a bit more breeze added for extra measure.  With three straight days of planing conditions, Viper sailors will remember this regatta for a while.  Local sailors Jay Golison, Steve Flam, and Mike Bradley dominated the day with a 2-1-1-1 to move up to fourth, but Jeff Grange, Tedd White and Chris Parker held onto their lead, with second and third only four points behind going into the final day.

Photos courtesy and copyright Bronny Daniels /

Viper 640 North Americans – Screaching in Long Beach
Written by Buttons Padin, V640 Class Administrator   
Friday, 05 September 2014 10:39

With planing conditions forecast and the sun shining, Viper sailors awoke happy but sore and groggy from a 4-race first day and evening festivities. “You have to really work hard to not have fun when sailing out here” said outgoing Class President Peter Beardsley. “The wind is great, the competition top notch, and the shore side activities are well hydrated.” The forecast was for 15 knots from the west with Day 1 leaders Jeff Grange, Tedd White and Chris Parker able to hold onto their overall lead despite not winning the day.

Jeff Grange Takes Control of Viper 640 North Americans After First Day
Written by Buttons Padin, V640 Class Administrator   
Wednesday, 03 September 2014 22:02

September 3, 2014

Long Beach, CA

Some championship regattas fall into the trope of “it’s never like this here.”  In Long Beach, California, this was not true thankfully for the Viper 640 fleet.  Despite dire forecasts, several days of light winds during practice, and an hour on-shore postponement, the Viper 640 North American Championship enjoyed Chamber of Commerce conditions with a classic Long Beach seabreeze for the 34 boats in attendance.  Sailing the inside course, the fleet sailed briskly through the relatively flat seas where hard hiking proved key for the day.

Long Beach NAs: Are You Ready to RUMmmmmble?
Written by V640 Press Office   
Friday, 29 August 2014 09:23

For the first time in the Viper 640 Class’s history, the North American championship will be contested on the west coast. Hosted by Alamitos Bay Yacht Club, the 2014 NAs will feature 40 boats with teams from seven states, as well as three Canadian and two Australian teams.  “We’re thrilled to bring the North Americans to a very deserving venue” said Class President Peter Beardsley.  “Long Beach is a fantastic place to sail, and the Southern California Viper fleet has become one of the largest in the country.”   READ MORE. Event website.

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