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

Great Racing, Great Friends, Great Beer, 30 Vipers
Written by V640 Press Office   
Tuesday, 14 October 2014 14:39

The High Performance Dinghy Open, better known as the “HPDO” has a slogan: “Great racing, great friends, great beer.”  Usually all of these things are present for the Viper 640 Class, and the 2014 edition was no exception: 30 boats competing in 8 races over two days, with the leaderboard constantly shuffling and 15 teams posting at least one race result in the top 5, a post-dinner fleet debrief that took over the bar at American YC, much to the surprise of AYC’s members, and plenty of mini kegs of Heineken.  Normally saying that the beer was warmer than the air temperature would be a major insult to the beer, but Saturday started with driving rain and unseasonably cool temperatures to cause some to reconsider their apparel choices a year in advance of the North Americans, to be sailed in the same waters at the same time of year.  The water in fact, was warmer than the air, which was a relief to some when the stiff easterly chop driven by an ENE breeze gusting into the high teens washed a wave over the boat.  The sun came out by Race 4, by which point local Jay Rhame and his team aboard Flux Capacitor had gotten off to a quick start with a 2,1,1.  Bermudians Somers Kempe and Butch Agnew and defending North American champs Brad Boston and Lee Shuckerow won Races 4 and 5 respectively to round out the top 3 heading into the final day.

Jeff Hankins and the Dragon Ladies saying "this is really warm compared to Maine."

Sunday brought sun and a dying breeze that started off around 12 knots.  The short courses with legs of 0.7 nm, tight competition, and shifty shore breeze bounced teams all over the scoreboard.  Dave Nickerson and Moise Solomon won back-to-back races, moving them up to fifth overall after a tough first day.  Jackpot jumped into the lead when Rhame got trapped on the left side of the beat on Race 6, and locals David Owen and Peter Beardsley on Ghost Panda jumped into second overall by a point after Race 7.  Race 8 saw even lighter winds with leftover chop and big shifts that kept the Race Committee busy moving marks.  Recent U.S Naval Academy graduate George Prieto and father Rich capped a strong regatta with a Race 8 win to move to sixth overall, with Jeff Hankins and Team Dragonfire rounding out the top 3 for their first podium results of the series.  Jackpot and Flux Capacitor finished neck and neck to end 1-2, Jackpot’s first HPDO win since the 2010 event, and Rhame’s first ever HPDO podium result and giving Rhame the overall 2014 Western Long Island Sound Circuit title.  The Bermudians avoided the holes to pass back Ghost Panda for the final podium spot.

In 2015, the HPDO will take place the weekend prior to the North Americans, three miles from the NAs host venue at Larchmont Yacht Club, and a huge Viper turnout is anticipated.  Results and photos, all of which are courtesy of our friends Allen and Daniela Clark at

Vermonstering: In Search of Champ
Written by Peter Beardsley   
Friday, 10 October 2014 16:10

Since it’s the day before the final major northeast Viper regatta of 2014, I realized it’d be a good idea to finish the writeup of the fantastic event from two weeks ago that I promised event chair Jason Hyerstay I’d write.  Normally HPDO ends the season for us, but the first (hopefully annual) Lake Champlain Viper Open made me wonder whether I got that right.  Jason emailed me a year ago asking what would be involved in getting sailors to join the 2 other Vipers already on Lake Champlain for a fall regatta.  The Vipers aren’t a demanding bunch.  Pick a windy time of year.  Keep costs down and the event charming.  Some fresh water and plentiful local beer can’t hurt.  Maybe have cheese falling from the clouds to keep the wives happy – let’s make this a family event.  Ask the leaves to change color, but not be so vibrant that the drive down I-89 is jam packed.  End racing early enough on Saturday to let people party with the UVM college kids in Burlington that night.  Find the best local ice cream sandwiches imaginable.  Do a weather dance to ensure enough visibility to make the not-too-distant Adirondacks sparkle.  Moose masseuses waiting on the lawn post-racing.  Embroidered flannel shirts for the winners.  Trophies made of maple syrup.   A high speed gondola from Lake Champlain Yacht Club to the top of Mount Mansfield.  A “Champ” sighting.  Oh, and plan to travel to a few events in 2014 to promote like crazy.  Jason nodded and said “ok, we can do that”, and enlisted a team of volunteers at LCYC to make one of the most memorable events of the year for the 11 Vipers in attendance.**  “We will all be back.  This is a special place and LCYC did an amazing job” said Tech Committee chair and regatta winner Dave Nickerson.

(nearly all photos courtesy Gerry Davis)

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.

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