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

2013 Viper North Americans - Day One Press Release
Written by Class Admin   
Wednesday, 09 October 2013 19:40
HOUSTON, Texas. (October 9): Thanks to all the hard work over the past couple of months, the newest location of the North Americans, Houston, has gotten underway. A total of 29 boats made the trip to the Republic of Texas, with boats representing 14 different states. Racing began today and will conclude on Saturday, October 12th.

After months of waiting, the fun finally started. The first race started with light winds of about 5-6 knots and was windward/leeward twice around. Malcolm, Gefter and crew (Wilem van Waay and Victor Diaz De Leon) took and early lead in the first race but Jay Golison and crew (Steve Flam and Ched Proctor) were able to edge out and take first place.

Breeze built from 5 to 8 knots throughout the day as a cold front from Tropical Storm Karen provided some relief (84 degrees) from the typical Texas heat. Winds were shifting from 90-130 degrees but on average competitors saw about 115 degree wind angle.

Viper's Got Talent
Written by Justin Scott   
Tuesday, 01 October 2013 08:27


David Chapman who has been sailing Fer De Lance with Glyn Locke and Ian Nicholson, showed the match racing circuit a bit of Viper talent when he won the Chicago Match Race Center Invitation A event last week. He had to snake past the #1 ranked World Match Racing Circuit skipper and tactician along the way.

David "Chappo" Chapman aka "The Closer" got talent!

From the Regatta Report: "The penultimate Grade 3 events in the 2013 season of the Chicago Match Race Center ended with young Australian talent David Chapman winning the Invitational A event (Sept 26-27). Chapman topped a field of eight teams from four nations.

Three Winners at CORK.
Written by EFG Pan American Blogger   
Tuesday, 27 August 2013 09:26

Vicious Panda wins CORK and Great Lakes Championship.

Rum Theory wins Canadian Championship (2nd in regatta and top Canadian Boat)

Argentinean sailor wins the online version of the CORK- EFG Pan American Series.

Young Olympic hopeful from South Africa takes the lead in the EFG online series (and would like to come to Miami)

All this, daily race recaps, and pictures at:

Full results from CORK

Day 2 at CORK – Flux Panda pitch a perfect “no hitter”.
Written by EFG Pan American Blogger   
Sunday, 25 August 2013 07:57

See EFG Pan Ams for updates on CORK

Better Know A Viperer: Ed Feo
Written by Viper 640 Admin   
Sunday, 18 August 2013 15:36
altThose of you on the West Coast and maybe some of you from the East Coast have had the pleasure to meet and sail against Ed Feo over the past couple years in the Viper. Ed has been very active in the fleet and a great addition to the group. Many of you might not know this, and he is much too humble to mention it, but Ed is one of the best Karaoke singers on the West Coast. Look for him at the NAs in Houston, buy him a beer and challenge him to a round of karaoke!

What is your home port: Long Beach, CA

Viper owned: "Locomotion" US 104. This was the boat sailed successfully by Tim Carter. I named the boat "Locomotion" after my prior boat, which was an Andrews 45. I had a bunch of gear with the name on it, so it made sense to keep the name! The Andrews 45 was called "Locomotion" by its original owner. He liked the song by that title, I guess. Anyway-- its a good name for a fast boat.

How long have you been racing Vipers: I have been racing Vipers for a couple of years. I was introduced to the boat by Tim Carter. One screaming reach with the kite up and I thought-- "I gotta have one of these."

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