Morgan says:

Yes, and that is my question.... does the maker know what kind of sail
pattern he has.

If he doesn't, he isn't much of a sail-maker.

If I like to make a mast I need data... just knowing wich
mast it may suit isn't much information to me... what I can see from here.

Before you design the mast, talk to a sailmaker. Custom sails are more
expensive than sails for an established class, which will already have patterns
available. It may be much cheaper to buy a pre-made rig for a known boat.

Steve
Stephen C. Baker - Yacht Designer
http://members.aol.com/SailDesign/pr...cbweb/home.htm