Yeah Tim, I`d say no more than 15-18knots looking at the size of sail and kite being used, but for those multi`s to average over 30 in light wind is amazing.
I`m curious as to why the windsurfer wasn`t on a Formula board with 10-12sqm sail area, would have been faster than the slalom board in those conditions..
As we speak the records are being taken apart in Walvis Bay, Namibia. Not the outright 500m record yet, but the nautical mile records are falling.
The speedsailing circus is there until 23 November, could be we see a new world record, maybe even the big 5-0 ??

http://www.50-knots.com/index.php?o...ask=view&id=66&Itemid=42