A friend of mine in the US runs a Viking reanactment society that has a couple of reproduction Viking ships.
They are selling one of them in preperation for taking delivery of a new and bigger (and better researched) boat and we have been talking alot about the old Fradreca. She is of oak and pine and lapstrake contruction in the viking manner. 32feet LOA with 29feet waterline and 9 feet of beem. Has twelve oars and a crew of 16-18 with a slightly too small viking square sail.
A couple of years ago Attli was quite surprised to find that this viking boat was also considerably faster then a Westsail32 under full sail. They caught it, passed by it and arrived at the dock in time to lower sail, tie up and, and have half the unloading done before the Westail32 entered the channel.
This is all I know about them (having only seen the pictures he took), but it is an amusing story.