Remember weight x arm = moment... so the deeper your lead, the more efficient it is... and the less you require. This works to a point, then you start getting into heeling moment and designed heel for optimum waterline length, lateral resisitance, pitch oscillation and inherant stability, and the list goes on.

So.. how much do you need? The numbers you provided are for an EXTREMELY powerful rig, highly efficient in light air, but if you get over 10 kts of wind, you are going to be so over powered, you are probably going to break something.

If you want to compare some numbers, you are describing a beamy Marblehead which carries by Class rule 800 sq in, and you are 1200+ (which is what an EC-12 carries) and you are doing it on a hull that is 7 inches shorter.

IMHO, your beam is too large for the project... unless you are trying for a planing hull, essentially a Laser type... and even then, I would think that you are still a little much.

I sail a Bantock "Strad" Marblehead, and I am looking for my "B" rig sails when the winds get over 11 kts (steady) The boat is just on the edge of having enough sail to make control difficult... although it FLIES when you can hold it right. With 1200+ in that wind it would bury the bow and bring the rudder completely out of the water.

If you are looking at sailing in "drifter" conditions which we have here more than 75% of the time, you would be OK, and probably out ghost most other boats, but I am guessing with that much horsepower you are looking for more wind than that. It would be a screamer around 8 kts, but after that... well.. I would not find it enjoyable wondering if I could get my boat back before it sank.

I *highly* recommend a good watertight hatch cover.

PS, my Marblehead has the bulb down around 20" and weighs... I am guessing off the top of my head... around 8 lbs.

Good Luck with it though, hope you get a good one