So, Wouter, have you sailed the M18?
I've sailed many beach cats but not the M18. Like Hakan said, not many of these have been build. I don't think there is a single one in the Netherlands. I was only allowed to touch is a Round Texel event several years ago. Does that count ? <img src="http://www.catsailor.com/forums/images/graemlins/grin.gif" alt="" />
I've asked Hakan about his M18 because searching the forums showed there were 2 Acats with subtantial extra buoyancy
There is significant difference between having "substantial extra bouyancy" from a 1-up crew weight perspective and having "substantial extra bouyancy' to take a much larger, heavier and much more powerful rig with a crew of 2.
How much does your P19 mast weight including its battens ? Note that every kg difference to the 15 all-up weight of the A-cat rig is going up there and will be swinging about. Last time I checked an alu P19 rig weighted just over 25 kg. Also the P19 mainsail still has 17.70 sq. mtr. surface area, the A-cat only 13.85 sq.mtr. This means you are overclocking the rig by 28 % already. You don't solve that by adding a few liters of bouyancy here and there.
With respect to equalizing the righting moment, think about adding no less then 3 feet of extra width just to break even. Making the overall boat 3.2 mtr wide, or wider then the Tornado. When you think the H16 is dive happy then you should try to sail this contraption in a big blow.
Come to think of it. These numbers are almost identical to a 18 sq. so why don't just by one of those ?
Do the math and you'll see that the specs really don't fit well to one another.
Wouter
