I did a little compensation for the upwind leg and come out at 26.9 knot average speed over the whole course using data you provided Steve.

I think this may well be the best example of a top speed. Relatively sheltered and flat waters, very large portion of beam reaches and ideal windconditions with a Tornado that still has the optimal jib cut for reaching (the old cut)

I don't think that any spi equipped boats is faster under spi than the same boat on a flying reach.

I would put the top sustainable speed for a beach cat at 27 knots with this example and expect most modern cat to be slightly below that (around 23 knots) due to optimation to windward-leeward courses.

I think you guys got some very optimal conditions for that record attempt and therefor very rare conditions.

So were still some way off the Tornado class claim of 33 knots.