I have no idea where you are, since you have not created a profile.
But anyway I use www.dogpile.com, and find interesting stuff. There is
a weight calculator, and lots of information at this Lake Ontario
site.
http://www.alchemyextrusions.com/projects/default.asp They did
NOT list keels. They seem to be close to a railroad spur, If I had the
stones I think I would dig a mold in the ground. A bulb keel would be
problematic. I think you have an idea that this is extremely
dangerous. Can you post information re your project? Pics? Vessel
dimensions, etc. ? That way we can surmize, ooh and aw and such.
Den 48Ft YF EAGLE