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

Announcing the Inaugural Miami Viper Scorch
Written by EFG Pan Am Committee   
Saturday, 25 January 2014 17:23

What the heck is a scorch??

Class Governor Kay Van Valkenburg started the Viper Scorch tradition in Marblehead many years ago. It's a fun, fast, reach or downwind sail in the company of other Vipers. It normally involves sailing fast to somewhere, stopping ashore for some lunch and drinks, then sailing home. While there are standing elapsed time records for the Marblehead scorches (if anyone can remember) , if you call it a race, you might be taking it too seriously! Think of it as the Viper take on a rondevous or gam...

For details click here.

Written by Justin Scott   
Wednesday, 22 January 2014 22:07



The 2014 EFG Pan American Championships  in Miami in March will be our first truly World championship level event with multiple Viper teams coming from three continents .  We have three Viper teams coming from Australia and at least two teams coming from Europe in addition to class regulars from the USA, Canada and Caribbean.  Previous North American, Canadian and Atlantic Coast Champions will be going head to head with the winner of the Australian Sport Boat National Championship, the winner of Cowes Week Sport Boat Class and the winner of the Lake Garda European Sport Boat Cup.  Please extend warm welcomes to Tim Reger, Australian National Sport Boat Champion, Jon Powell British Sport Boat Class Champion  and all of the overseas competitors.

The Australians are sending three teams as part of a strategy to  win the party as well as the sailing. The Marblehead fleet however is putting together a very strong team,determined not to let the Aussies beat us in our own bars! The frigid winter conditions have been ideal for a series of practice events in Maddys and the Three Cods.

As a quick update:-

1. Our concept for Miami is that teams take 5 days off work, but get 5 days of racing and 2 additional days of fun sailing & beach in Miami.

· Friday Night - Sunday Morning is for travel. The first start on Sunday will allow time for rigging

· Sunday/Monday is the tune up regatta called the EFG Winter Cup. The emphasis is on good racing in an informal atmosphere.

· On Tuesday, teams will be able to participate in the Miami Scorch. This will be a screaming reach from Coconut Grove to  No Name Harbor at the end of Key Biscayne where we raft up off a bar called "Boater Grill". The participation of wives, husbands, girlfriends, kids from the dock and anyone you picked up at Mango's the previous evening will be encouraged.   Tuesday Evening is a Viper dinner in coconut grove + some awards.

· Wednesday can be a lay day to explore Miami but there will also be a coaching session led by a combination of pro sailors  and the more experienced Viper sailors .

· Thursday – Saturday will be the three day high quality Racing at the Pan Ams.


On Sunday, we all drive home or leave our boats at Charleston. More Updates coming soon.



Fangin' it
Sunday, 05 January 2014 22:38

Australian slang saying

1. to drive at great speed eg He was fangin' it around the corner.


The 7th Australian Sports Boat Association National Titles were sailed from the Fremantle Sailing Club.

The Fremantle Doctor lived up to its reputation with only one race under ten knots and the most in the high teens to gear busting 25+ knots.


November Sailing at Hampton Yacht Club - Fall Fling
Written by Mike Gravitt   
Sunday, 24 November 2013 22:20
On November 15, 16 and 17, Hampton Yacht Club hosted the Fall Fling one design regatta. This annual regatta included 505s, Sonars, J 70s, Viper 640s, 420s and Albacores. HYC has expressed great interest in developing a Viper fleet so with the help of RONDAR and reps Dan Tucker and Tyler Moore, factory boats were brought down and local sailors were able to crew and drive the boats in the racing. On Friday Tyler Moore conducted a racing clinic to help newcomers learn the boat and to also help more experienced Viper sailors with speed tips. On Saturday the conditions were less than spectacular with light air for November and being the right place at the right time made all the difference. The after race party was held at the beautiful home of a club member with roasted oysters, BBQ and many home made dishes that were amazing not to mention an abundance of adult beverages of all flavors. Sunday the breeze teased all morning but never filled in enough to get in a race. There is a lot of talent at HYC with the make-up teams of local sailors taking the top three spots. The top spot was taken by Olympic sailor Geoff Ewenson, second place went to local J 36 sailor David Eberwine, and third going to Mark Wheeler. HYC really put on a great regatta and RONDAR threw all it had into helping Hampton get on the map with Viper One Design sailing.
Day 4 Viper 640 North Americans: Jason Carroll and Argo Win Championship
Written by Class Admin   
Sunday, 13 October 2013 16:40


















HOUSTON, Texas. (October 12): The final day of the Viper 640 North Americans hoped to clear out a cluster at the top of the leaderboard, but forecasted thunderstorms meant that the fleet would be fortunate to get in two races in a 7-10 knot SSE breeze. Jason Carroll with his team of Chad Corning and Danny Pletsch aboard Argo entered with a 13-point lead, but the next five boats were separated by fewer than 15 points, with a few ties mixed in.

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