I've attached a picture of my track from a couple of days ago. I sailed my Mystere 6.0, solo, with only a mainsail, in about 12-16 knot winds.

The sail used was a Tornado sail which is about twelve inches shorter in the foot than the stock Mystere sail. [take 12 inches from a foot and you have...nothing! ] The builder says that a stock main sail is 18.1 square meters. I believe a Tornado main sail is 15 squares. So I'm sailing this thing with an 83% main.

Wind is from the West and my circuit direction is counter-clockwise; first upwind moving West, then downwind moving East.

My distance sailed was 17.7 nautical miles.
My time was 2.1 hours.
My average boat speed was 8.4 knots.
My average boat speed upwind was 8.4 knots.
My average boat speed downwind was 8.4 knots.
My average upwind tacking angle (true, over the ground) was 96º (48º
off the wind)
My average downwind tacking angle (true, over the ground) was 117º
(121.5º off the wind)

I never could understand why this boat points so much better than other centerboarded catamarans that I've sailed on. I have come to think that it is the narrow, vertical bow acting as a lifting surface. I wonder if a 10 foot wide Mystere 6.0*XL* can point this well. I know that the Tornados that I've sailed on can't do it. And the shape of the centerboards are not a whole lot different than the Mystere centerboards.

Would anyone care to comment, compare, or speculate?

Cheers,
GARY